Real Estate [Abstract] Schedule of Real Estate Properties [Table] Schedule of Real Estate Properties [Table] Real Estate Property Ownership [Axis] Real Estate Property Ownership [Axis] Real Estate Properties [Domain] Real Estate Properties [Domain] Commercial Operating Properties Commercial Operating Properties [Member] Commercial Operating Properties [Member] Residential Operating Properties Residential Operating Properties [Member] Residential Operating Properties [Member] Condominium Units Condominium Units [Member] Condominium Units [Member] Net Lease Net Lease Asset [Member] Represents details pertaining to net lease assets. Real Estate Properties [Line Items] Real Estate Properties [Line Items] Property transferred to held for sale, aggregate, carrying value Property Transferred to Held for Sale, Aggregate, Carrying Value Property Transferred to Held for Sale, Aggregate, Carrying Value Number of residential units Number of Residential Units Number of Residential Units Property transferred from held for sale, aggregate, carrying value Property Transferred from HFS, Aggregate, Carrying Value Property Transferred from HFS, Aggregate, Carrying Value Land and Land Improvements [Abstract] Land Land [Member] Land and land development, at cost Land and Land Improvements Less: accumulated depreciation Real Estate Investment Property, Accumulated Depreciation and Amortization Real Estate Investment Property, Accumulated Depreciation and Amortization Total land and development, net Inventory, Real Estate, Land and Land Development Costs Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Unsecured Credit Facilities Unsecured Credit Facilities [Member] Represents the unsecured credit facility of the entity. 2012 Secured Credit Facilities Secured Credit Facilities, 2012 [Member] Represents the secured credit facility of the entity entered into in 2012. 2015 Revolving Credit Facility Secured Credit Facility Revolver Due March 2018 [Member] Secured Credit Facility Revolver Due March 2018 [Member] Total secured credit facilities and mortgages Secured Credit Facilities [Member] Represents the secured credit facility of the entity. Debt Instrument [Line Items] Debt Instrument [Line Items] Minimum ratio of unencumbered assets to unsecured indebtedness Debt Instrument Covenant Ratio of Unencumbered Assets to Unsecured Indebtedness Represents the minimum ratio of encumbered assets to unsecured indebtedness required under the terms of the debt covenant. Multiple of the minimum collateral coverage on outstanding borrowings Debt Instrument Covenant Multiple of Minimum Collateral Coverage on Outstanding Borrowings Represents the multiple of the minimum collateral coverage on outstanding borrowings required under the terms of the debt covenant. Multiple of minimum fixed charges on outstanding borrowings Debt Instrument Covenant Multiple of Minimum Fixed Charges on Outstanding Borrowings Debt Instrument Covenant Multiple of Minimum Fixed Charges on Outstanding Borrowings Percentage of REIT taxable income permitted for distribution under debt convenants Debt Instrument Covenant Percentage of Taxable Income Permitted for Distribution if Reit classification is Maintained Represents the percentage of taxable income that is permitted for distribution, under the terms of the debt covenant, if the entity maintains its REIT qualification. SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure [Abstract] SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward] SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward] Balance at January 1 SEC Schedule III, Real Estate Accumulated Depreciation Additions SEC Schedule III, Real Estate Accumulated Depreciation, Depreciation Expense Dispositions SEC Schedule III, Real Estate Accumulated Depreciation, Real Estate Sold Balance at December 31 Schedule of land and land improvements land and land improvements [Table Text Block] [Table Text Block] for land and land improvements [Table] Accounting Policies [Abstract] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Building Building [Member] Furniture and Equipment Furniture and Equipment [Member] Furniture and Equipment [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Useful life Property, Plant and Equipment, Useful Life Fair Value Disclosures [Abstract] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Beginning balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Repayments Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Unrealized gains recorded in other comprehensive income Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Ending balance Entities [Table] Entities [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Taxable REIT Subsidiaries Taxable REIT Subsidiaries [Member] Represents the taxable REIT subsidiaries ("TRSs") through which the entity is engaged in various real estate related opportunities, including but not limited to managing various investments in equity affiliates and managing activities related to certain foreclosed assets. Entity Information [Line Items] Entity Information [Line Items] Assets with foreclosure elections Assets With Foreclosure Elections Carrying Value Assets With Foreclosure Elections Carrying Value Operating loss carryforwards Operating Loss Carryforwards Assets owned taxable subsidiaries Assets Owned By Taxable Real Estate Investment Trust Subsidiaries Assets Owned By Taxable Real Estate Investment Trust Subsidiaries Current tax benefit (expense) Current Income Tax Expense (Benefit) Deferred tax benefit (expense) Deferred Income Tax Expense (Benefit) Total income tax (expense) benefit Income Tax Expense (Benefit) REIT income tax benefit Effective Income Tax Rate Reconciliation, REIT Income Tax Benefit Effective Income Tax Rate Reconciliation, REIT Income Tax Benefit Income (loss) of subsidiaries Combined Taxable Income of Taxable Reit Subsidiaries Represents income of taxable REIT subsidiaries subject to tax during the period. Provision adjustment Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Income taxes paid Income Taxes Paid Deferred tax assets Deferred Tax Assets, Gross Valuation allowance Deferred Tax Assets, Valuation Allowance Net deferred tax assets (liabilities) Deferred Tax Assets, Net Real estate asset basis differences Real Estate Asset Basis Differences The difference in the tax basis and carrying amounts of real estate assets of owned assets, before tax effects. Other credits Deferred Tax Assets, Tax Credit Carryforwards, Other Deferred expenses and other items Deferred Tax Assets, Tax Deferred Expense, Other Mortgage Loans on Real Estate [Abstract] Movement in Mortgage Loans on Real Estate [Roll Forward] Movement in Mortgage Loans on Real Estate [Roll Forward] Balance at January 1 Mortgage Loans on Real Estate, Carrying Amount of Mortgages Additions: Additions [Abstract] Additions [Abstract] New mortgage loans Mortgage Loans on Real Estate, New Mortgage Loans Additions under existing mortgage loans Mortgage Loans on Real Estate, Additions under Existing Mortgage Loans Total amount of additions under existing mortgage loans on real estate during the reporting period. Other Mortgage Loans on Real Estate, Other Additions Deductions: Deductions [Abstract] Deductions [Abstract] Collections of principal Mortgage Loans on Real Estate, Collections of Principal Recovery of (provision for) loan losses Mortgage Loans on Real Estate, Provision for Loan Losses The provision for loan losses on mortgage loans on real estate amortized during the reporting period. Transfers (to) from real estate and equity investments Mortgage Loan on Real Estate, Transfers From Real Estate and Equity Investments Mortgage Loan on Real Estate, Transfers From Real Estate and Equity Investments Amortization of premium Mortgage Loans on Real Estate, Amortization of Premium Balance at December 31 Charge offs Mortgage Loans on Real Estate, Charge Offs The charge-offs on mortgage loans on real estate recognized during the reporting period. Organization, Consolidation and Presentation of Financial Statements [Abstract] Business and Organization Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Receivables [Abstract] Schedule of Impaired Financing Receivable [Table] Schedule of Impaired Financing Receivable [Table] Impaired Loans Related Allowance [Axis] Impaired Loans Related Allowance [Axis] Attributes of impaired loans classified as impaired with or without specific allowance related to the loans, by class of financial receivable. Impaired Loans Related Allowance [Domain] Impaired Loans Related Allowance [Domain] Represents a subset of a class of impaired loans that have or do not have the specific allowances related to the impaired receivables. With no related allowance recorded Receivables Without Allowance [Member] Receivables Without Allowance [Member] With an allowance recorded Receivables With Allowance [Member] Receivables With Allowance [Member] Receivable Type [Axis] Receivable Type [Axis] Receivable [Domain] Receivable [Domain] Subordinate mortgages Second Mortgage [Member] Senior mortgages First Mortgage [Member] Corporate/Partnership loans Corporate/Partnership Loan [Member] Corporate/Partnership Loan [Member] Nonperforming Financial Instruments Nonperforming Financial Instruments [Member] Financing Receivable, Impaired [Line Items] Financing Receivable, Impaired [Line Items] Recorded Investment Impaired Financing Receivable, Recorded Investment Unpaid Principal Balance Impaired Financing Receivable, Unpaid Principal Balance Related Allowance Impaired Financing Receivable, Related Allowance Average Recorded Investment Impaired Financing Receivable, Average Recorded Investment Interest Income Recognized Impaired Financing Receivables Interest Income Cash or Accrual Method The interest income recognized on a cash-basis or accrual method of accounting during the time within that period that the financing receivables were impaired. Impaired financing receivable, interest income, cash basis method Impaired Financing Receivable, Interest Income, Cash Basis Method Schedule of debt obligations Schedule of Debt [Table Text Block] Schedule of future scheduled maturities of outstanding long-term debt obligations, net Schedule of Maturities of Long-term Debt [Table Text Block] Schedule of carrying value of encumbered assets by asset type Schedule of Encumbered Assets [Table Text Block] Tabular disclosure of assets which were encumbered with mortgages or pledged as collateral for borrowings at the end of the reporting period(s). Land and Development Land and Development [Text Block] Land and Development [Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of changes in non-vested restricted stock units Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] Requisite service period Defined Contribution Plan, Service Requirement Represents the period of continuous service with the Company required in order to be eligible to participate in the 401(k) Plan. Defined contribution plan maximum percentage of matching contribution Defined Contribution Plan Maximum Percentage Of Matching Contribution Company May Make Of First Ten Percentage Of Participating Employees Annual Compensation At Discretion Of Board Of Directors At the discretion of the Board of Directors, represents the maximum percentage matching contribution which the Company may make of the first ten percent of the participant's annual compensation. Defined contribution plan maximum percentage of employee compensation Defined Contribution Plan Maximum Percentage Of Employee Compensation Upon Which Company Matching Contribution Is Based Represents the maximum percentage of a participant's annual compensation upon which the matching Company contribution is based. Gross contributions made by the Company Defined Contribution Plan, Cost Recognized Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Net Lease Asset Two Net Lease Asset Two [Member] Net Lease Asset Two [Member] Operating Properties Operating Property [Member] Operating Property [Member] Operating Properties Operating Properties [Member] Operating Properties [Member] Net Lease Asset One Net Lease Asset One [Member] Net Lease Asset One [Member] Investment, Name [Axis] Investment, Name [Axis] Investment, Name [Domain] Investment, Name [Domain] RCC RCC [Member] [Member] RCC [Member] [Member] iStar Net Lease I LLC iStar Net Lease I LLC [Member] iStar Net Lease I LLC [Member] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Proceeds from sale of other real estate Proceeds from Sale of Other Real Estate Income from sales of real estate Residential Property Profit (Loss) The gain resulting from the sale or other disposition of residential properties or components of those assets during the period. Property sold, aggregate, carrying value Property Sold, Aggregate, Carrying Value Property Sold, Aggregate, Carrying Value Income from sales of real estate Gain (Loss) on Sale of Properties Sales price of real estate held for investment Sales price of real estate held for investment Sales price of real estate held for investment iStar's ownership percentage Equity Method Investment, Ownership Percentage Net proceeds from sales of real estate Proceeds from Sale of Real Estate Held-for-investment Operating leases, term Lessor Leasing Arrangements, Operating Leases, Term of Contract Other finite-lived intangible assets Other Finite-Lived Intangible Assets, Gross Payments for repurchase of redeemable noncontrolling interest Payments for Repurchase of Redeemable Noncontrolling Interest Number of real estate properties sold Number of Real Estate Properties Sold Number of Real Estate Properties Sold Noncontrolling interest, ownership percentage by parent Noncontrolling Interest, Ownership Percentage by Parent Transfer mortgage payable Transfer Mortgage Payable Commitments and Contingencies Disclosure [Abstract] Rent expense Operating Leases, Rent Expense, Net 2017 Operating Leases, Future Minimum Payments Due, Next Twelve Months 2018 Operating Leases, Future Minimum Payments, Due in Two Years 2019 Operating Leases, Future Minimum Payments, Due in Three Years 2020 Operating Leases, Future Minimum Payments, Due in Four Years 2021 Operating Leases, Future Minimum Payments, Due in Five Years Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Derivative Instruments and Hedging Activities Disclosure [Abstract] Risk Management and Derivatives Derivative Instruments and Hedging Activities Disclosure [Text Block] Equity [Abstract] Dividends [Abstract] Dividends [Abstract] Minimum percentage of taxable income excluding capital gains Minimum Percentage of Taxable Income Excluding Capital Gains to be Distributed to Qualify as REIT Represents the minimum percentage of taxable income (excluding capital gains) to be distributed in order to qualify as REIT. Percentage of taxable income (including net capital gains) to be distributed in order to qualify as REIT Percentage of Taxable Income Including Capital Gains to be Distributed to Qualify as REIT Represents the percentage of taxable income (including capital gains) to be distributed in order to qualify as REIT. Segment Reporting [Abstract] Number of reportable segments Number of Reportable Segments Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Operating Segments Operating Segments [Member] Corporate/Other Corporate Reconciling Items And Eliminations [Member] Corporate Reconciling Items And Eliminations [Member] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Real Estate Finance Real Estate Lending [Member] Represents the Real Estate Lending segment that includes all of the Company's activities related to senior and mezzanine real estate debt and corporate capital investments. Net Lease Net Leasing [Member] Represents the Net Leasing segment that includes all of the company's activities related to the ownership and leasing of corporate facilities. Operating Properties Land and Development Land and Development Segment [Member] Land and Development Segment [Member] Segment Reporting Segment Reporting Information [Line Items] Operating lease income Operating Leases, Income Statement, Lease Revenue Interest income Interest and Fee Income, Loans, Commercial Other income Other Income Land development revenue Land Sales Earnings (loss) from equity method investments Income (Loss) from Equity Method Investments Total revenue and other earnings Revenue and Other Earnings The sum of the Company's total revenue and other earnings related to the Company's business segments. Real estate expense Cost of Real Estate Held-for-Sale and Other Real Estate Owned This element represents the aggregate of the holding and operating costs related to real estate held for investment and the net costs related to other real estate owned. Land development cost of sales Costs of Land Sales Costs of Land Sales Other expense Other Expenses Allocated interest expense Interest Expense Allocated general and administrative General and Administrative Expense Excluding Stock-based Compensation Expense The aggregate total of expenses of managing and administering the affairs of the entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line, excluding stock-based compensation expense. Segment profit (loss) Segment Profit (Loss) Amount of profit or loss during the period recognized by the reportable segment. (Recovery of) provision for loan losses Provision for Loan Losses Expensed Impairment of assets Asset Impairment Charges Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Capitalized expenditures Real Estate and Accumulated Depreciation Costs, Capitalized Subsequent to Acquisition Carrying amount as of the balance sheet date of costs that were capitalized after acquisition, including property improvements and carrying costs (for example, real estate taxes and insurance), but excluding the initial purchase price. Real estate, net Real Estate Investment Property, Held for Use, Net Real Estate Investment Property, Held for Use, Net Real estate available and held for sale Real Estate Available and Held for Sale Carrying amount as of the balance sheet date of investments in land and buildings held for sale, including real estate considered to be inventory of the entity. Total real estate Real Estate Investment Property, Net Land and development, net Loans receivable and other lending investments, net Loans and Other Lending Investments Amount representing an agreement for an unconditional promise by the maker to pay the Entity (holder) a definite sum of money at a future date, net of any write-downs taken for collection uncertainty on the part of the holder. Such amount may include accrued interest receivable in accordance with the terms of the note. The note also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among myriad other features and characteristics. In addition, amount also includes total debt and equity financial instruments including: securities held-to-maturity and securities available-for-sale. Other investments Other Investments Total portfolio assets Portfolio Assets The aggregate of Total real estate, loans receivable, net and Other investments. Cash and other assets Cash and Other Assets Sum of all assets excluding the Company's Total Portfolio Assets. Total assets Assets Stock-based compensation expense Allocated Share-based Compensation Expense Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Title of Individual [Axis] Title of Individual [Axis] Schedule of Share-based Compensation Arrangement by Title of Individual with Relationship to Entity [Domain] Relationship to Entity [Domain] Director [Member] Director [Member] Award Type [Axis] Award Type [Axis] Award Type [Domain] Equity Award [Domain] CSE CSE [Member] CSE [Member] Restricted Stock Restricted Stock [Member] CSE and Restricted Stock Awards CSE and Restricted Stock Award [Member] CSE and Restricted Stock Award [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Number of shares granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Options, grants in period, weighted average grant date fair value (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Non-vested, outstanding (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Aggregate intrinsic value for directors Share based Compensation Arrangement by Share based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value for Directors The aggregate intrinsic value of outstanding equity awards on equity-based plans excluding option plans for which the Company is contingently obligated to issue equity instruments or transfer assets to an director as calculated by applying the disclosed pricing methodology. Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Series D Series D Preferred Stock [Member] Series E Series E Preferred Stock [Member] Series F Series F Preferred Stock [Member] Series G Series G Preferred Stock [Member] Series I Series I Preferred Stock [Member] Outstanding nonredeemable series I preferred stock or outstanding series I preferred stock. Classified within stockholders' equity if nonredeemable or redeemable solely at the option of the issuer. Classified within temporary equity if redemption is outside the control of the issuer. Series J (convertible) Series J Preferred Stock [Member] Series J Preferred Stock [Member] Class D, E, F, G, I Class D, E, F, G, I [Member] Class D, E, F, G, I [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Maximum Maximum [Member] Minimum Minimum [Member] Class of Stock [Line Items] Class of Stock [Line Items] Shares Issued and Outstanding Preferred Stock Shares Issued and Outstanding Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury) and held by stockholders. May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt and preferred shares that have been repurchased. Par Value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Liquidation Preference (in dollars per share) Preferred Stock, Liquidation Preference Per Share Rate per Annum Preferred Stock, Dividend Rate, Percentage Equivalent to Fixed Annual Rate (in dollars per share) Preferred Stock, Dividend Rate, Per-Dollar-Amount Number of days in year used in the computation of preferred stock dividends for any partial dividend period Preferred Stock, Dividends Computation of Dividends Payable for Any Partial Dividend Period, Number of Days in Year Represents the number of days in year used in the computation of preferred stock dividends for any partial dividend period. Number of months used in the computation of preferred stock dividends for any partial dividend period Preferred Stock, Dividends Computation of Dividends Payable for Any Partial Dividend Period, Number of Months Represents the number of months used in the computation of preferred stock dividends for any partial dividend period. Number of days in month, dividends computation of dividends payable for any partial dividend period Preferred Stock, Dividends Computation of Dividends Payable for Any Partial Dividend Period, Number of Days in Month Represents the number of days in month used in the computation of preferred stock dividends for any partial dividend period. Number of days prior to dividend payment date that Board of Directors may elect to designate as the payment date Preferred Stock Dividends, Number of Days Prior to Dividend Payment Date That Board of Directors May Elect to Designate as Payment Date Represents the number of days prior to dividend payment date that Board of Directors may elect to designate as the payment date. Dividends declared and paid Dividends declared and paid Aggregate dividends declared and paid during the period for each share of common stock outstanding. Capital gains distribution percentage Capital Gains Distribution, Percentage Capital Gains Distribution, Percentage Unrecaptured Section 1250 gain percentage Unrecaptured Section 1250 Gain, Percentage of Dividend Unrecaptured Section 1250 Gain, Percentage of Dividend Long term capital gain percentage Long Term Capital Gain, Percentage of Dividend Long Term Capital Gain, Percentage of Dividend Ordinary income percentage Ordinary Income, Percentage of Dividend Ordinary Income, Percentage of Dividend Amount of preferred dividends in arrears Preferred Stock, Amount of Preferred Dividends in Arrears Shares issued upon conversion Convertible Preferred Stock, Shares Issued upon Conversion Conversion price (in dollars per share) Convertible Preferred Stock, Conversion Price Per Share Convertible Preferred Stock, Conversion Price Per Share Redemption price as a percentage of liquidation preference Preferred Stock, Redemption Price as a Percentage of Liquidation Preference Preferred Stock, Redemption Price as a Percentage of Liquidation Preference Statement of Financial Position [Abstract] Statement [Table] Statement [Table] Series D, E, F, G and I Preferred Stock Series D, E, F, G and I Preferred Stock [Member] Series D, E, F, G and I Preferred Stock [Member] Series J convertible perpetual preferred stock Statement [Line Items] Statement [Line Items] Liquidation preference (in dollars per share) Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, shares issued (in shares) Common Stock, Shares, Issued Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Held-to-Maturity Securities, Amortized Cost Basis Held-to-maturity Securities, Debt Maturities, Net Carrying Amount [Abstract] Within one year Held-to-maturity Securities, Debt Maturities, within One Year, Net Carrying Amount After one year through 5 years Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Net Carrying Amount After 5 years through 10 years Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount After 10 years Held-to-maturity Securities, Debt Maturities, after Ten Years, Net Carrying Amount Total Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment Held-to-Maturity Securities, Estimated Fair Value Held-to-maturity Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] Within one year Held-to-maturity Securities, Debt Maturities, Next Twelve Months, Fair Value After one year through 5 years Held-to-maturity Securities, Debt Maturities, Year Two Through Five, Fair Value After 5 years through 10 years Held-to-maturity Securities, Debt Maturities, Year Six Through Ten, Fair Value After 10 years Held-to-maturity Securities, Debt Maturities, after Ten Years, Fair Value Total Held-to-maturity Securities, Fair Value Available-for-Sale Securities, Amortized Cost Basis Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] Within one year Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis After one year through 5 years Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis After 5 years through 10 years Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis After 10 years Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis Total Available-for-sale Debt Securities, Amortized Cost Basis Available-for-Sale Securities, Estimated Fair Value Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] Within one year Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value After one year through 5 years Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value After 5 years through 10 years Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value After 10 years Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value Total Available-for-sale Securities, Debt Securities, Fair Value Available-for-sale Securities, Debt Securities, Fair Value Reconciliation of segment profit (loss) to income (loss) from continuing operations Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Abstract] Segment profit Less: Recovery of (provision for) loan losses Less: Impairment of assets Less: Depreciation and amortization Less: Stock-based compensation expense Less: Income tax benefit (expense) Less: Loss on early extinguishment of debt, net Gains (Losses) on Extinguishment of Debt Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Earnings Per Share [Abstract] Reconciliation of income (loss) from continuing operations used in the basic and diluted EPS calculations Schedule of Income (Loss) from Continuing Operations Used in Basic and Diluted Earnings Per Share Calculations [Table Text Block] Tabular disclosure of the reconciliation of income (loss) from continuing operations used in the basic and diluted EPS calculations. Schedule of earnings per share allocable to common shares and HPU shares Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of anti-dilutive shares Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Capitalization and depreciation Property, Plant and Equipment, Policy [Policy Text Block] Purchase price allocation Business Combinations Policy [Policy Text Block] Impairments Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Real estate available and held for sale Real Estate Available and Held for Sale Policy [Policy Text Block] Real Estate Available and Held for Sale Policy [Policy Text Block] Dispositions Revenue Recognition, Real Estate Transactions, Policy [Policy Text Block] Loans receivable and other lending investments, net Policy Loans Receivable, Policy [Policy Text Block] Debt securities, other than temporary impairment Debt Securities, Other Than Temporary Impairment Policy [Policy Text Block] Debt Securities, Other Than Temporary Impairment Policy [Policy Text Block] Loans and leases receivable, real estate acquired through foreclosure Loans and Leases Receivable, Real Estate Acquired Through Foreclosure, Policy [Policy Text Block] Equity and cost method investments Equity and Cost Method Investments, Policy [Policy Text Block] Cash and cash equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Restricted cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Variable interest entities Consolidation, Variable Interest Entity, Policy [Policy Text Block] Deferred expense and other assets Deferred Charges, Policy [Policy Text Block] Identified intangible assets and liabilities Intangible Assets, Finite-Lived, Policy [Policy Text Block] Loan participations payable, net Transfers and Servicing of Financial Assets, Policy [Policy Text Block] Revenue recognition Revenue Recognition, Policy [Policy Text Block] Reserve for loan losses Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block] Loss on debt extinguishments Gain (Loss) on Debt Extinguishment, Policy [Policy Text Block] Gain (Loss) on Debt Extinguishment, Policy [Policy Text Block] Derivative instruments and hedging activity Derivatives, Policy [Policy Text Block] Stock-based compensation Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Income taxes Income Tax, Policy [Policy Text Block] Earnings per share Earnings Per Share, Policy [Policy Text Block] New accounting pronouncements New Accounting Pronouncements, Policy [Policy Text Block] 2016 Senior Secured Credit Facility 2016 Senior Secured Credit Facility [Member] 2016 Senior Secured Credit Facility [Member] Mortgages collateralized by net lease assets Secured Term Loans Collateralized by Loans Net Lease Assets Due Through 2026 [Member] Secured Term Loans Collateralized by net lease assets due through 2026 debt instrument of the entity. 2012 Tranche A-2 Facility Secured Credit Facilities Tranche A-2 Facility Due March, 2017 [Member] Represents the Secured Tranche A-2 Facility of the entity maturing in March 2017. Total secured credit facilities and mortgages 5.875% senior notes Unsecured Notes 5 point 875 Percent Senior Notes Due March 2016 [Member] Unsecured Notes 5.875% due March 2016 senior notes debt instrument of the entity. 3.875% senior notes Unsecured Notes 3 point 875 Percent Senior Notes Due July 2016 [Member] Unsecured Notes 3 point 875 Percent Senior Notes Due July 2016 [Member] 3.00% senior convertible notes Senior Convertible Three Point Zero Percent Notes Due November 2016 [Member] Senior Convertible Three Point Zero Percent Notes Due November 2016 [Member] 1.50% senior convertible notes Senior Convertible One Point 50 Percent Notes Due November 2016 [Member] Senior Convertible One Point 50 Percent Notes Due November 2016 [Member] 5.85% senior notes Unsecured Notes 5 point 85 Percent Senior Notes Due March 2017 [Member] Unsecured Notes 5.85% due March 2017 senior notes debt instrument of the entity. 9.00% senior notes Unsecured Notes Nine Percent Senior Notes Due June 2017 [Member] Unsecured Notes Nine Percent Senior Notes Due June 2017 [Member] 4.00% senior notes Unsecured Notes Four Percent Senior Notes Due November 2017 [Member] Unsecured Notes Four Percent Senior Notes Due November 2017 [Member] 7.125% senior notes Unsecured Notes Seven Point One Two Five Percent Senior Notes Due February 2018 [Member] Unsecured Notes Seven Point One Two Five Percent Senior Notes Due February 2018 [Member] 4.875% senior notes Unsecured Notes 4 point 875 Percent Senior Notes Due July 2018 [Member] Unsecured Notes 4 point 875 Percent Senior Notes Due July 2018 [Member] 5.00% senior notes Unsecured Notes Five Percent Senior Notes Due July 2019 [Member] Unsecured Notes Five Percent Senior Notes Due July 2019 [Member] 6.50% senior notes Unsecured Notes Six Point Five Percent Senior Notes Due July 2021 [Member] Unsecured Notes Six Point Five Percent Senior Notes Due July 2021 [Member] Unsecured Notes Unsecured Senior Notes [Member] Represents the unsecured senior notes of the entity. Trust preferred securities Other Debt Securities, Due October 2035 [Member] Represents other debt obligations due in October, 2035. Term Loan for Remaining Balance After Maturity Secured Credit Facility Revolver Due March 2018, Term Loan for Remaining Balance After Maturity [Member] Secured Credit Facility Revolver Due March 2018, Term Loan for Remaining Balance After Maturity [Member] 2012 Tranche A-1 Facility Secured Credit Facilities Tranche A-1 Facility Due March, 2016 [Member] Represents the Secured Tranche A-1 Facility of the entity maturing in March 2016. Maximum Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] London Interbank Offered Rate (LIBOR) London Interbank Offered Rate (LIBOR) [Member] Federal Funds Effective Swap Rate Federal Funds Effective Swap Rate [Member] Interest Rate Type [Axis] Interest Rate Type [Axis] Interest Rate Type [Axis] Interest Rate Type [Domain] Interest Rate Type [Domain] [Domain] for Interest Rate Type [Axis] Base Rate Base Rate [Member] Total debt obligations Long-term Debt, Gross Debt discounts and deferred financing costs, net Debt Instrument, Unamortized Discount (Premium) and Deferred Financing Costs, Net Debt Instrument, Unamortized Discount (Premium) and Deferred Financing Costs, Net Total long-term debt obligations, net Long-term Debt Debt instrument, face amount Debt Instrument, Face Amount Stated interest rate Debt Instrument, Interest Rate, Stated Percentage Variable interest rate, spread Debt Instrument, Basis Spread on Variable Rate Stated interest rate, minimum Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum Stated interest rate, maximum Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum Debt instrument, margin Debt Instrument, Margin Debt Instrument, Margin Debt instrument term Debt Instrument, Term Weighted average interest rate Debt, Weighted Average Interest Rate Convertible debt conversion ratio Debt Instrument, Convertible, Conversion Ratio Conversion price (in dollars per share) Debt Instrument, Convertible, Conversion Price Conversion of senior unsecured convertible notes into common stock Debt Conversion, Converted Instrument, Amount Shares of common stock converted (in shares) Debt Conversion, Converted Instrument, Shares Issued Interest costs capitalized Interest Costs Capitalized SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward] SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward] Balance at January 1 SEC Schedule III, Real Estate, Gross Improvements and additions Real Estate Improvements and Additions Amount of improvements and additions made to real estate investments during the period. Acquisitions through foreclosure SEC Schedule III, Real Estate, Acquisitions Through Foreclosures Other acquisitions SEC Schedule III, Real Estate, Other Acquisitions Dispositions SEC Schedule III, Real Estate, Cost of Real Estate Sold Impairments SEC Schedule III, Real Estate, Write-down or Reserve, Amount Balance at December 31 Investments, All Other Investments [Abstract] Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Marina Palms Marina Palms, LLC [Member] Marina Palms, LLC [Member] Marine Palms, LLC, North Tower Marine Palms, LLC, North Tower [Member] Marine Palms, LLC, North Tower [Member] Marine Palms, LLC, South Tower Marine Palms, LLC, South Tower [Member] Marine Palms, LLC, South Tower [Member] Other real estate equity investments Other Real Estate Equity Investments [Member] Other Real Estate Equity Investments [Member] Newly Formed Unconsolidated Entity Newly Formed Unconsolidated Entity [Member] Newly Formed Unconsolidated Entity [Member] Equity Method Investee Two Real Estate Equity Investment Two [Member] Real Estate Equity Investment Two [Member] Real Estate Equity Investment Four Real Estate Equity Investment Four [Member] Real Estate Equity Investment Four [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Other Income Other Income [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Loans Receivable and Other Lending Investments, Net Loans Receivable and Other Lending Investments, Net [Member] Loans Receivable and Other Lending Investments, Net [Member] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Partners' capital account, contributions (up to) Partners' Capital Commitment Partners' Capital Commitment Equity method investment, related party ownership percentage Equity Method Investment, Related Party Ownership Percentage Equity Method Investment, Related Party Ownership Percentage Equity method investment, related party promote fee percentage Equity Method Investment, Related Party Promote Fee Percentage Equity Method Investment, Related Party Promote Fee Percentage Equity method investment, partner ownership percentage Equity Method Investment, Partner Ownership Percentage Equity Method Investment, Partner Ownership Percentage Contributions to other investments Payments for Contributions to Unconsolidated Entities This element represents payments for contributions to unconsolidated entities. Net proceeds from sales of real estate Number of properties acquired Number of Properties Acquired Number of Properties Acquired Acquisitions of real estate assets Payments to Acquire Real Estate by Equity Method Investee Payments to Acquire Real Estate by Equity Method Investee Total assets Equity Method Investment, Summarized Financial Information, Assets Management fees revenue Management Fees Revenue Impairment Equity Method Investment, Other than Temporary Impairment Number of units for sale Number of Units in Real Estate Property Remaining for Sale End of Period Number of Units in Real Estate Property Remaining for Sale End of Period Distributions from other investments Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital Number of units Number of Units in Real Estate Property Percentage of units pre-sold Real Estate Property, Percentage of Units Pre-sold Real Estate Property, Percentage of Units Pre-sold Carrying value Equity Method Investments Land development cost of sales Proceeds from sale of other real estate, net of equity contribution Proceeds from Sale of Other Real Estate, Net of Equity Contribution Proceeds from Sale of Other Real Estate, Net of Equity Contribution Loans commitment Loans Commitments,Related Party Loans Commitments,Related Party Payments for funding under loan commitments Loans Receivable, Related Party Loans Receivable, Related Party Interest and fee income InterestAndFeeIncomeLoansCommercialRelatedParty InterestAndFeeIncomeLoansCommercialRelatedParty Payments for investments Payments to Acquire Investments Cost investments Cost Method Investments Proceeds from sale of available-for-sale securities Proceeds from Sale of Available-for-sale Securities, Equity Available-for-sale securities, realized gain Available-for-sale Securities, Gross Realized Gain (Loss) Asset Class [Axis] Asset Class [Axis] Asset Class [Domain] Asset Class [Domain] Encumbered Assets Encumbered Assets [Member] Encumbered Assets [Member] Unencumbered Assets Unencumbered Assets [Member] Unencumbered Assets [Member] Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] Loan Participations Payable Loan Participations Payable [Member] Loan Participations Payable [Member] Evaluation Type [Axis] Evaluation Type [Axis] Evaluation Type [Axis] Evaluation Type [Domain] Evaluation Type [Domain] [Domain] for Evaluation Type [Axis] Collectively Evaluated for Impairment Collectively Evaluated for Impairment [Member] Collectively Evaluated for Impairment [Member] Real estate available and held for sale Loans receivable and other lending investments, net Other investments Cash and other assets General reserves for loan losses Financing Receivable, Allowance for Credit Losses Loan participations Loans Receivable, Net Stock-Based Compensation Plans and Employee Benefits Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Income Statement [Abstract] Revenues: Revenues [Abstract] Total revenues Revenues Costs and expenses: Costs and Expenses [Abstract] Interest expense Real estate expense General and administrative General and Administrative Expense Other expense Total costs and expenses Costs and Expenses Income (loss) before earnings from equity method investments and other items Income (Loss) from Continuing Operations before Income (Loss) from Equity Method Investments and Other Items This element represents the income (loss) from continuing operations before income (loss) from equity method investments, gains (losses) on early extinguishment of debt, and other items. Loss on early extinguishment of debt, net Earnings from equity method investments Income (loss) from operations before income taxes Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Income tax benefit (expense) Income (loss) from operations Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest Net (income) loss attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Net income (loss) attributable to iStar Inc. Net Income (Loss) Attributable to Parent Preferred dividends Preferred Stock Dividends, Income Statement Impact Net (income) loss allocable to HPU holders and Participating Security holders Net Income (Loss) Available to HPU Holders and Participating Security Holders, Basic Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period) available to HPU holders and Participating Security holders. Net income (loss) allocable to common shareholders Net Income (Loss) Available to Common Stockholders, Basic Income (loss) attributable to iStar Inc. from operations: Income (Loss) from Operations before Extraordinary Items, Per Basic and Diluted Share [Abstract] Basic (in dollars per share) Income (Loss) from Continuing Operations, Per Basic Share Diluted (in dollars per share) Income (Loss) from Continuing Operations, Per Diluted Share Net income (loss) attributable to iStar Inc.: Earnings Per Share, Basic and Diluted [Abstract] Basic (in dollars per share) Earnings Per Share, Basic Diluted (in dollars per share) Earnings Per Share, Diluted Weighted average number of common shares: Weighted Average Number of Shares Outstanding, Basic [Abstract] Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Per HPU share data: Net Income (Loss) Attributable to Parent [Abstract] Income (loss) attributable to iStar Inc. from operations—Basic and diluted (in dollars per share) Income (Loss) From Continuing Operations, Per HPU Basic and Diluted Share Income (Loss) From Continuing Operations, Per HPU Basic and Diluted Share Net income (loss) attributable to iStar Inc.—Basic and diluted (in shares) Earnings Per HPU Share, Basic and Diluted Earnings Per HPU Share, Basic and Diluted Weighted average number of HPU share—Basic and diluted (in shares) Weighted Average Number of HPU Shares Outstanding Basic and Diluted The average number of shares of High Performance common stock (a separate class of stock) issued and outstanding that are used in calculating basic and diluted EPS. Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] External Credit Rating by Grouping [Axis] External Credit Rating by Grouping [Axis] External Credit Rating by Grouping [Domain] External Credit Rating by Grouping [Domain] Real Estate Finance Performing Financial Instruments [Member] Recorded Investments in loans, presented by class and by credit quality, as indicated by risk rating Financing Receivable, Recorded Investment [Line Items] Performing Loans Financing Receivable, Net Weighted Average Risk Ratings Weighted Average Risk Ratings Represents the weighted average risk rating of the instrument. Other Assets and Other Liabilities [Abstract] -- None. No documentation exists for this element. -- Other Significant Noncash Transactions [Table] Other Significant Noncash Transactions [Table] Assets Held-for-Sale Real Estate Asses Held-for-Sale [Member] Real Estate Asses Held-for-Sale [Member] Other Significant Noncash Transactions [Line Items] Other Significant Noncash Transactions [Line Items] Other liabilities Other Liabilities Accrued expenses Accrued Liabilities Other than Interest Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include property accounts payable, legal liabilities, loan costs, general and administrative liabilities, but exclude interest. Accrued interest payable Interest Payable Intangible liabilities, net Below Market Lease, Net Accounts payable, accrued expenses and other liabilities Accounts Payable and Accrued Liabilities Profit sharing payable Profit Sharing Payable Profit Sharing Payable Special assessment bond Special Assessment Bond Below market lease, accumulated amortization Below Market Lease, Accumulated Amortization Amortization of below market lease Amortization of Below Market Lease Statement of Comprehensive Income [Abstract] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Member] Reclassification out of Accumulated Other Comprehensive Income [Member] Earnings from equity method investments Earnings Per Share Earnings Per Share [Text Block] 2017 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 2018 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Five Schedule of the Company's loans and other lending investments by class Schedule of Loans and Other Lending Investments [Table Text Block] Tabular disclosure of loans and other lending investments by class. Includes the gross carrying value of a loan by class, reserve for loan losses, and the net carrying value as of the Balance Sheet date. Schedule of changes in the Company's reserve for loan losses Allowance for Credit Losses on Financing Receivables [Table Text Block] Schedule of recorded investment in loans and associated reserve for loan losses Schedule of Investment in Loans and Associated Reserve for Loan Losses [Table Text Block] Tabular disclosure of the Company's recorded investment in loans and the associated reserve for loan losses. Schedule of investment in performing loans, presented by class and by credit quality, as indicated by risk rating Financing Receivable Credit Quality Indicators [Table Text Block] Schedule of recorded investment in loans, aged by payment status and presented by class Past Due Financing Receivables [Table Text Block] Schedule of recorded investment in impaired loans, presented by class Impaired Financing Receivables [Table Text Block] Schedule of average recorded investment in impaired loans and interest income recognized, presented by class Impaired Financing Receivables Average Recorded Investment and Interest Income Recognized [Table Text Block] Tabular disclosure by class of the average recorded investment in impaired loans and the related interest income recognized. Schedule of other lending investments - securities Marketable Securities [Table Text Block] Schedule of contractual maturities of the Company's securities Investments Classified by Contractual Maturity Date [Table Text Block] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Loans Receivable One Loans Receivable One [Member] Loans Receivable One [Member] Investment [Axis] Investment [Axis] Investment [Domain] Investment [Domain] Loan 1 Loan 1 [Member] Loan 1 [Member] Accounts, Notes, Loans and Financing Receivable [Line Items] Total gross carrying value of loans Loans Receivable Net of Deferred Income Reflects the aggregate gross carrying amount of all categories of loans held in portfolio, after deducting deferred income, but before deducting the allowance for losses on loans. Reserves for loan losses Total loans receivable, net Other lending investments—securities Held-to-Maturity and Available-for-sale Securities This item represents investments in debt securities which are categorized as held-to-maturity and securities classified as available for sale. Total loans receivable and other lending investments, net Fair value reduction Loans Receivable Net of Deferred Income, Reduction in Principal Balance Loans Receivable Net of Deferred Income, Reduction in Principal Balance Interest receivable Interest Receivable Carrying value of loans sold Loans, Sold Loans Carrying Value Represents the carrying value of loans sold during the period. Realized investment gains (losses) Realized Investment Gains (Losses) Pro forma total revenues Business Acquisition, Pro Forma Revenue Pro forma net income Business Acquisition, Pro Forma Net Income (Loss) Schedule of Debt Securities [Table] Schedule of Available-for-sale Securities [Table] Debt Security [Axis] Debt Security [Axis] Major Types of Debt Securities [Domain] Major Types of Debt Securities [Domain] Municipal Bonds Municipal Bonds [Member] Corporate Debt Securities Debt Securities [Member] Schedule of Debt Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract] Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract] Face Value Available-for-sale Securities, Debt Security, Face Amount Available-for-sale Securities, Debt Security, Face Amount Net Unrealized Gain (Loss) Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax Estimated Fair Value Net Carrying Value Available-for-sale Securities, Debt Securities Held-to-Maturity Securities, Debt Maturities [Abstract] Held-to-maturity Securities, Debt Maturities [Abstract] Face Value Held-to-maturity Securities, Debt Security, Face Amount Held-to-maturity Securities, Debt Security, Face Amount Net Unrealized Gain (Loss) Held-to-maturity Securities, Accumulated Unrecognized Holding Gain Estimated Fair Value Net Carrying Value Held-to-maturity Securities Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Face Value Debt Securities, Face Amount Debt Securities, Face Amount Amortized Cost Basis Debt Securities, Amortized Cost Basis Debt Securities, Amortized Cost Basis Net Unrealized Gain (Loss) Debt Securities, Unrealized Holding Gains Debt Securities, Unrealized Holding Gains Estimated Fair Value Debt Securities, Fair Value Debt Securities, Fair Value Net Carrying Value Debt Securities, Net Carrying Amount Debt Securities, Net Carrying Amount Transfers and Servicing [Abstract] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Loan Participation Payable One Loan Participation Payable One [Member] Loan Participation Payable One [Member] Accounts, Notes, Loans and Financing Receivable [Line Items] Loan Participations Payable, gross Loan Participations Payable, gross Loan Participations Payable, gross Debt discounts and deferred financing costs, net Loan participations payable, net Loan Participations Payable, net Loan Participations Payable, net Number of debt instruments Number of Debt Instruments Number of Debt Instruments Loans receivable Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping, Disclosure Item Amounts [Axis] Measurement Basis [Axis] Fair Value, Disclosure Item Amounts [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Fair Value Estimate of Fair Value Measurement [Member] Book and estimated fair values of financial instruments Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Financial assets: Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Financial liabilities: Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Debt obligations, net Percentage of capital committed to strategic investments that may be drawn down Percentage of Capital Committed that May be Drawn Down Represents the percentage of capital committed to strategic investments by the entity that may be drawn down. Unfunded Financial Commitments [Table] Unfunded Financial Commitments [Table] Summarization of information required or determined to be disclosed about arrangements in which the entity has committed to off-balance sheet financial commitments. Unfunded Financial Commitments [Axis] Unfunded Financial Commitments [Axis] Information by arrangements in which the entity has committed to off-balance sheet financial commitments. Unfunded Financial Commitments [Domain] Unfunded Financial Commitments [Domain] This item is intended to be populated, by the entity, with Members identifying each off-balance sheet financial commitment. Loans and Other Lending Investments Loans Receivable [Member] Real Estate Real Estate [Member] Other Investments Other Investments [Member] Unfunded Financial Commitments [Line Items] Unfunded Financial Commitments [Line Items] Performance-Based Commitments Performance-Based Commitments Represents the off-balance sheet unfunded maximum amount of funds for construction and development loans and build-outs of space in net lease assets over a period of time if and when the borrowers and tenants meet established milestones and other performance criteria. Strategic Investments Other Commitments Represents the off-balance sheet maximum other commitments of the entity. Total Unfunded Commitments Represents certain off-balance sheet unfunded commitments of the entity. Segment Reporting Segment Reporting Disclosure [Text Block] Unsecured Debt Unsecured Debt [Member] Secured Debt Secured Debt [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Maturities of Long-term Debt [Abstract] Maturities of Long-term Debt [Abstract] 2017 Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 2018 Long-term Debt, Maturities, Repayments of Principal in Year Two 2019 Long-term Debt, Maturities, Repayments of Principal in Year Three 2020 Long-term Debt, Maturities, Repayments of Principal in Year Four 2021 Long-term Debt, Maturities, Repayments of Principal in Year Five Thereafter Long-term Debt, Maturities, Repayments of Principal after Year Five Total principal maturities Obligations maturing in February 2018 Long-term Debt, Maturities, Repayments of Principal in Next Rolling Twelve Months Available capacity Available cash and borrowing capacity Available cash and borrowing capacity Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Dilutive Securities [Axis] Dilutive Securities [Axis] Dilutive Securities [Axis] Dilutive Securities [Domain] Dilutive Securities [Domain] [Domain] for Dilutive Securities [Axis] Joint venture shares Joint Venture Shares [Member] Incremental common shares attributable to joint venture shares that were not included in diluted earnings per share (EPS) because to do so would increase EPS amounts or decrease loss per share amounts during the period presented. 1.50% convertible senior unsecured notes Unsecured Notes 1 point 50 Percent Senior Convertible Notes Due November 2016 [Member] [Member] Unsecured Notes 1 point 50 Percent Senior Convertible Notes Due November 2016 [Member] [Member] 3.00% convertible senior unsecured notes Unsecured Notes 3 Percent Senior Convertible Notes Due October 2016 [Member] Unsecured Notes 3 Percent Senior Convertible Notes Due October 2016 Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Income (loss) from operations Income from sales of real estate Net (income) loss attributable to noncontrolling interests Income (loss) from continuing operations attributable to iStar Inc. and allocable to common shareholders, HPU holders and Participating Security Holders for basic earnings per common share Income (Loss) from Continuing Operations Attributable to Parent and Available to Common Shareholders Hpu Holders and Participating Security Holders The income or loss from continuing operations during the period which is attributable to the parent and is available to common shareholders, HPU holders and Participating Security holders. Dilutive securities, effect on basic earnings per share, dilutive convertible securities Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities Income (loss) from continuing operations attributable to iStar Inc. and allocable to common shareholders, HPU holders and Participating Security Holders for diluted earnings per common share Income (Loss) from Continuing Operations Attributable to Parent and Available to Common Shareholders HPU Holders and Participating Security Holders, Diluted Income (Loss) from Continuing Operations Attributable to Parent and Available to Common Shareholders HPU Holders and Participating Security Holders, Diluted Stated interest rates Undistributed earnings (loss) allocated to participating securities, basic Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Undistributed earnings (loss) allocated to participating securities, diluted Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted Loan Participations Payable, Net Transfers and Servicing of Financial Assets [Text Block] Repurchase of common stock, authorized amount Stock Repurchase Program, Authorized Amount Stock repurchased and retired during period, shares Stock Repurchased and Retired During Period, Shares Common stock value acquired including acquisition costs Common Stock Value Acquired Including Acquisition Costs Common Stock Value Acquired Including Acquisition Costs Average cost per share Common Stock Acquired, Average Cost Per Share Common Stock Acquired, Average Cost Per Share Available repurchase of common stock, authorized amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Valuation and Qualifying Accounts [Abstract] Valuation and Qualifying Accounts Disclosure [Table] Valuation and Qualifying Accounts Disclosure [Table] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves [Domain] Valuation Allowances and Reserves [Domain] Reserve for loan losses Loans Receivable Allowance [Member] The allowance for loan losses represents the reserve to cover probable credit losses related to specifically identified loans, as well as probable credit losses inherent in the remainder of the loan portfolio as of the balance sheet date. Allowance for doubtful accounts Allowance for Doubtful Accounts [Member] Allowance for deferred tax assets Valuation Allowance of Deferred Tax Assets [Member] Valuation and Qualifying Accounts Disclosure [Line Items] Valuation and Qualifying Accounts Disclosure [Line Items] Movement in Valuation Allowances and Reserves [Roll Forward] Movement in Valuation Allowances and Reserves [Roll Forward] Balance at Beginning of Period Valuation Allowances and Reserves, Balance Charged to Costs and Expenses Valuation Allowances and Reserves, Charged to Cost and Expense Adjustments to Valuation Accounts Valuation Allowances and Reserves, Adjustments Deductions Valuation Allowances and Reserves, Deductions Balance at End of Period Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) [Table] Interest Expense Interest Expense [Member] Earnings from equity investments Earnings from Equity Method Investments [Member] Earnings from Equity Method Investments [Member] Other Expense Other Expense [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Interest rate cap Interest Rate Cap [Member] Interest rate swaps Interest Rate Swap [Member] Foreign exchange contracts Foreign Exchange Contract [Member] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Designated as hedge Designated as Hedging Instrument [Member] Not designated as hedge Not Designated as Hedging Instrument [Member] Derivative financial instruments on consolidated statements of operations Derivative Instruments, Gain (Loss) [Line Items] Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Effective Portion) Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Earnings (Effective Portion) Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Earnings (Ineffective Portion) Derivative Instruments, Loss Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing Amount of Gain or (Loss) Recognized in Income Derivative, Gain (Loss) on Derivative, Net Mortgage Loans on Real Estate Schedule [Table] Mortgage Loans on Real Estate Schedule [Table] Mortgage Loans on Real Estate, Loan Type [Axis] Mortgage Loans on Real Estate, Loan Type [Axis] Mortgage Loans on Real Estate, Loan Type [Domain] Mortgage Loans on Real Estate, Loan Type [Domain] Borrower A Borrower A [Member] Details pertaining to Borrower A. Borrower B Borrower B [Member] Details pertaining to Borrower B. Borrower C Borrower C [Member] Details pertaining to Borrower C. Borrower D Borrower D [Member] Details pertaining to borrower D. Borrower E Borrower E [Member] Details pertaining to borrower E. Borrower F Borrower F [Member] Details pertaining to borrower F. Senior Mortgages Individually Less than 3 Percent Senior Mortgages Individually Less than 3 Percent [Member] Details pertaining to Senior mortgages individually less than 3%. Senior Mortgages Senior Mortgages [Member] Details pertaining to Senior Mortgages. Subordinate Mortgages Individually Less than 3 Percent Subordinate Mortgages Individually Less than 3 Percent [Member] Details pertaining to subordinate mortgages individually less than 3%. Subordinate Mortgages Subordinate Mortgages [Member] Details pertaining to subordinate mortgages. Minimum Contractual Interest Rates [Axis] Contractual Interest Rates [Axis] This element represents the categories used to group the different contractual interest rates. Contractual Interest Rates [Domain] Contractual Interest Rates [Domain] The description of different contractual interest rates. Contractual Interest Accrual Rates Contractual Interest Accrual Rates [Member] Details pertaining to Contractual Interest Accrual Rates. Contractual Interest Payment Rates Contractual Interest Payment Rates [Member] Details pertaining to Contractual Interest Payment Rates. Mortgage Loans on Real Estate [Line Items] Mortgage Loans on Real Estate [Line Items] Prior Liens Mortgage Loans on Real Estate, Prior Liens Face Amount of Mortgages Mortgage Loans on Real Estate, Face Amount of Mortgages Carrying Amount of Mortgages Reserves on impaired loans Mortgage Loans on Real Estate, Write-down or Reserve, Amount Variable spread on LIBOR Loans Receivable, Basis Spread on Variable Rate Minimum interest rate Mortgage Loans on Real Estate, Minimum Interest Rate in Range Maximum interest rate Mortgage Loans on Real Estate, Maximum Interest Rate in Range Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Noncontrolling Interests Noncontrolling Interest [Member] Real Estate Investment Real Estate Investment [Member] Other Strategic Investments Other Strategic Investments [Member] Other Strategic Investments [Member] Equity method Investee Three Equity method investee 2 [Member] Equity method investee 2 [Member] Oak Hill Funds Group Oak Hill Funds Group 2 [Member] Represents information pertaining to Oak Hill group two, which includes OHA Strategic Master Fund, L.P. Net proceeds from sale of other investments Proceeds from Sale of Equity Method Investments Recognized earnings Equity Method Investment, Realized Gain (Loss) on Disposal Equity method investee Equity Method Investee Equity Method Investee Schedule of cumulative redeemable and convertible perpetual preferred stock outstanding Schedule of Stock by Class [Table Text Block] Accumulated other comprehensive income (loss) reflected in the Company's shareholders' equity Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule IV - Mortgage Loans on Real Estate Mortgage Loans on Real Estate, by Loan Disclosure [Text Block] Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Variable Interest Entities by Classification of Entity [Axis] Variable Interest Entities [Axis] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Classification [Domain] Consolidated VIEs Variable Interest Entity, Primary Beneficiary, Aggregated Disclosure [Member] Unconsolidated VIEs Variable Interest Entity, Not Primary Beneficiary [Member] Variable interest entities Variable Interest Entity [Line Items] Total revenues and total expenses related to consolidated VIEs Variable Interest Entity, Measure of Activity [Abstract] Variable interest entity, consolidated, carrying amount, assets Variable Interest Entity, Consolidated, Carrying Amount, Assets Variable interest entity, consolidated, carrying amount, liabilities Variable Interest Entity, Consolidated, Carrying Amount, Liabilities Carrying value of the investments Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net Variable interest entity unfunded commitment Variable Interest Entity Unfunded Commitment The amount of unfunded commitments that the entity has to the Variable Interest Entity. Schedule of Financing Receivables Past Due [Table] Schedule of Financing Receivables Past Due [Table] Recorded investment in loans, aged by payment status and presented by class Financing Receivable, Recorded Investment, Past Due [Line Items] Current Financing Receivable, Recorded Investment, Current Less Than and Equal to 90 Days Financing Receivable Recorded Investment Equal to Less than 90 Days Past Due Financing receivables that are equal to or less than 90 days past due. Greater Than 90 Days Financing Receivable Recorded Investment Greater than 90 Days Past Due Financing receivables that are greater than 90 days past due. Total Past Due Financing Receivable, Recorded Investment, Past Due Financing receivable, total Financing Receivable, Gross Financing receivable, number of loans greater than 90 days past due Financing Receivable, Number of Loans Greater than 90 Days Past Due Financing Receivable, Number of Loans Greater than 90 Days Past Due Financing receivables, past due time period Financing Receivables, Past Due Time Period Financing Receivables, Past Due Time Period Schedule II - Valuation and Qualifying Accounts and Reserves Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Other Investments Other Investments [Text Block] This element represents the disclosures for equity method investments, cost method investments, and marketable securities. Real Estate Real Estate Disclosure [Text Block] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Recurring basis Fair Value, Measurements, Recurring [Member] Non-recurring basis Fair Value, Measurements, Nonrecurring [Member] Total Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Quoted market prices in active markets (Level 1) Fair Value, Inputs, Level 1 [Member] Significant other observable inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Significant unobservable inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Valuation Technique [Axis] Valuation Technique [Axis] Valuation Technique [Domain] Valuation Technique [Domain] Liquidation liquidation [Member] Fair value based on expected proceeds from liquidation. Comparable sales comparable sales [Member] comparable sales [Member] Discounted cash flow Discounted Cash Flow Valuation Technique [Member] Discounted cash flow valuation technique used to measure fair value. Loans Receivable Loans Receivable Two [Member] Loans Receivable Two [Member] Assets and liabilities recorded at fair value Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Derivative assets Derivative Asset Derivative liabilities Derivative Liability Available-for-sale securities Available-for-sale Securities Impaired loans Impaired Loans Receivable Fair Value Disclosure This element represents impaired loans as of the end of the reporting period that are valued by the entity at fair value on the balance sheet date. Impaired real estate Impaired Other Real Estate Owned Fair Value Disclosure This element represents impaired OREOs held by the Company as of the end of the reporting period that are valued by the entity at fair value on the balance sheet date. Weighted average discount rate Fair Value Inputs, Discount Rate Sellout period Impaired Real Estate Asset, Sellout Period Impaired Real Estate Asset, Sellout Period Number of impaired loans Number of Impaired Loans Number of Impaired Loans Real Estate Tenant Receivables Real Estate Tenant Receivables [Member] Real Estate Tenant Receivables [Member] Deferred Operating Lease Deferred Operating Lease [Member] Deferred Operating Lease [Member] Allowance for doubtful accounts receivable Allowance for Doubtful Accounts Receivable Quarterly Financial Information Disclosure [Abstract] Common Stock Common Stock [Member] HPU HPU [Member] This element represents HPU's (High Performance Units). Revenue Net income (loss) Earnings per common share data: Earnings Per Common Share [Abstract] Earnings Per Common Share [Abstract] Net income (loss) attributable to iStar Inc. Net income (loss) attributable to iStar Inc., diluted Net Income (Loss) Attributable to Parent, Diluted Weighted average number of shares, Basic (in shares) Weighted average number of shares, Diluted Earnings per HPU share data: Basic Earnings Per HPU Share [Abstract] Basic Earnings Per HPU Share [Abstract] Net income (loss) attributable to iStar Inc. Net Income (Loss) Available to Hpu Holders Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred (accumulated for the period) available to HPU holders. Basic and diluted (in dollars per share) Weighted average number of HPU shares—basic and diluted Schedule of components of income tax expense (benefit) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of deferred tax assets and liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Schedule of financial measures for each segment based on which performance is evaluated Schedule of Segment Reporting Information, by Segment [Table Text Block] Reconciliation of segment profit to income (loss) from continuing operations Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] Stock Performance Award, Program [Axis] Stock Performance Award, Program [Axis] Pertinent data describing and reflecting disclosures pertaining to a stock performance award program, by plan. Stock Performance Award, Program [Domain] Stock Performance Award, Program [Domain] Stock performance plans and award types. High Performance Unit Program High Performance Unit Program [Member] Represents the details pertaining to high performance unit program of the entity. High Performance Unit Program 2002 Plan High Performance Unit Program 2002 Plan [Member] Represents the details pertaining to high performance unit program 2002 plan of the entity. High Performance Unit Program 2003 Plan High Performance Unit Program 2003 Plan [Member] Represents the details pertaining to high performance unit program 2003 plan of the entity. High Performance Unit Program 2004 Plan High Performance Unit Program 2004 Plan [Member] Represents the details pertaining to high performance unit program 2004 plan of the entity. Stock Performance Award, Program by Participant [Axis] Stock Performance Award, Program by Participant [Axis] Pertinent data describing and reflecting disclosures pertaining to a stock performance award program, by participant. Stock Performance Award, Program Participant [Domain] Stock Performance Award, Program Participant [Domain] Stock performance plans and participants. Employee Stock Performance Award Participant Employee Stock Performance Award Participant [Member] Represents the employees participating in a stock performance award plan. Stock performance award initial purchase price of participant interest Stock Performance Award Initial Purchase Price of Participant Interest, Cumulative Stock Performance Award Initial Purchase Price of Participant Interest, Cumulative Stock performance award, number of plans, not meet performance thresholds Stock Performance Award, Number of Plans which Did Not Meet Performance Thresholds Represents the number of High Performance programs which did not meet performance thresholds and were not funded. Stock performance award common stock shares basis for distribution calculation Stock Performance Award Common Stock Shares Basis for Distribution Calculation Represents the number of shares of the entity's common stock which are used as the basis for determining the amount of distributions to be paid to the holders of the stock performance awards. Stock performance award, shares outstanding, number Stock Performance Award, Shares Outstanding, Number Represents the number of High Performance Common Stock shares outstanding in the plan. Stock performance award, number of voting rights per share Stock Performance Award, Number of Voting Rights Per Share Represents the number of votes per stock performance award. HPUs outstanding (in shares) HPUs outstanding HPUs outstanding Common stock equivalent underlying HPUs (in shares) Common stock equivalent underlying HPUs Common stock equivalent underlying HPUs Cash exchange rate for CSE underlying HPU (in dollars per share) Cash exchange rate for CSE underlying HPU Cash exchange rate for CSE underlying HPU Common stock exchange rate for CSE underlying HPU, Shares Common stock exchange rate for CSE underlying HPU, Shares Common stock exchange rate for CSE underlying HPU, Shares Percentage of holders with binding commitments to tender, cash redemption Stock Performance Award Percentage of Holders with Binding Commitments To Tender, Cash Redemption Stock Performance Award Percentage of Holders with Binding Commitments To Tender, Cash Redemption HPU cash value acquired HPU Cash Value Acquired The amount of cash paid to redeem outstanding HPUs. Percentage of holders with binding commitments to tender Stock Performance Award Percentage of Holders with Binding Commitments To Tender Stock Performance Award Percentage of Holders with Binding Commitments To Tender Stock issued during period (in shares) Stock Issued During Period, Shares, New Issues Stock issued Stock Issued High performance units, value High Performance Units This element represents equity based compensation which qualifies as a second class of stock. Schedule of deferred expenses and other assets, net Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block] Schedule of accounts payable, accrued expenses and other liabilities Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Schedule of expense from the amortization of lease intangible assets and liabilities Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Statement of Stockholders' Equity [Abstract] Preferred Stock Preferred Stock [Member] Common Stock at Par Additional Paid-In Capital Additional Paid-in Capital [Member] Retained Earnings (Deficit) Retained Earnings [Member] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Series J Preferred Stock HPU's Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning Balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Dividends declared—preferred Dividends, Preferred Stock, Cash Issuance of stock/restricted stock unit amortization, net Issuance of Stock and Restricted Stock Unit Amortization Net Value of stock related to restricted stocks awards issued during the period and the amortization of restricted stock units and other restricted stock activity. Issuance of common stock for conversion of senior unsecured convertible notes Stock Issued During Period, Value, Conversion of Convertible Securities Net income (loss) for the period Profit (Loss) Adjusted for Income (Loss) Attributable to Redeemable Noncontrolling Interest The consolidated profit or loss for the period including the portion attributable to the noncontrolling interest, net of income taxes and income (loss) attributable to redeemable noncontrolling interest. Change in accumulated other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Repurchase of stock Stock Repurchased During Period, Value Redemption of HPUs HPUs Acquired During Period, Value HPUs Acquired During Period, Value Change in additional paid in capital attributable to noncontrolling interests(5) Adjustments to Additional Paid in Capital, Other Contributions from noncontrolling interests Noncontrolling Interest, Increase from Subsidiary Equity Issuance Distributions to noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Change in noncontrolling interests Noncontrolling Interest, Decrease from Deconsolidation Ending Balance Net income (loss) Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Reclassification of (gains)/losses on available-for-sale securities into earnings upon realization Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Reclassification of (gains)/losses on cash flow hedges into earnings upon realization Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax Realization of (gains)/losses on cumulative translation adjustment into earnings upon realization Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax Unrealized gains/(losses) on available-for-sale securities Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Unrealized gains/(losses) on cash flow hedges Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Unrealized gains/(losses) on cumulative translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Other comprehensive income (loss) Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive (income) loss attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive income (loss) attributable to iStar Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Schedule of quarterly financial information Schedule of Quarterly Financial Information [Table Text Block] Loans Receivable and Other Lending Investments, net Loans and Other Lending Investments Net [Text Block] This element represents a summarization of loans and other lending investments held by the company. Statement of Cash Flows [Abstract] Land Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income (loss) to cash flows from operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Impairment of assets Asset Impairment Charges, Cash Flow Impact Asset Impairment Charges, Cash Flow Impact Depreciation and amortization Depreciation, Depletion and Amortization Payments for withholding taxes upon vesting of stock-based compensation Stock Based Compensation Shares Withheld For Employee Taxes Upon Vesting Shares withheld for employee taxes upon vesting of stock-based compensation arrangements. Non-cash expense for stock-based compensation Share-based Compensation Amortization of discounts/premiums and deferred financing costs on debt obligations, net Amortization of Financing Costs and Discounts Amortization of discounts/premiums on loans, net Amortization of Discounts or Premiums Deferred Interest and Costs on Lending Investments The component of interest income representing the noncash interest earned in the period on loans and other lending investments as well as the amortization of deferred costs or fees over the related loan investments. Deferred interest on loans, net Deferred Interest on Loans Deferred Interest on Loans, net Gain from sales of loans Gain (Loss) on Sales of Loans, Net Distributions from operations of other investments Proceeds from Equity Method Investment, Dividends or Distributions Deferred operating lease income Straight Line Rent Income from sales of real estate and development revenue in excess of cost of sales Loss on early extinguishment of debt, net Gains (Losses) on Extinguishment of Debt, Cash Flow Impact Amount represents the cash flow impact of the difference between the fair value of the payments made and the carrying amount of the debt at the time of its extinguishment. Debt discount on repayments and repurchases of debt obligations Repayments and repurchases of debt discount The component of debt repayments representing repayment of original issue discounts, classified as operating cash flows. Other operating activities, net Other Operating Activities, Cash Flow Statement Changes in assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Changes in accrued interest and operating lease income receivable, net Increase (Decrease) in Accrued Interest and Operating Lease and Income Receivable This element represents net change during the reporting period in accrued interest income and operating lease income receivable earned but not yet received. Changes in deferred expenses and other assets, net Increase (Decrease) in Prepaid Expense and Other Assets Changes in accounts payable, accrued expenses and other liabilities, net Increase (Decrease) in Accounts Payable and Accrued Liabilities Cash flows provided by (used in) operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Originations and fundings of loans receivable, net Payments to Acquire Notes Receivable Capital expenditures on real estate assets Payments for Capital Improvements Capital expenditures on land and development assets Payment for Capital Expenditures on Land and Development Assets Payment for Capital Expenditures on Land and Development Assets Acquisitions of real estate assets Payments to Acquire Real Estate Repayments of and principal collections on loans receivable and other lending investments, net Proceeds from Principal Repayments on Portfolio of Assets Proceeds from Principal Repayments on Portfolio of Assets Net proceeds from sales of loans receivable Proceeds from Sale of Loans Held-for-investment Net proceeds from sales of real estate Proceeds from Sale of Real Estate Net proceeds from sale of other investments Proceeds from sale of land development Proceeds from sale of land development Contributions to other investments Changes in restricted cash held in connection with investing activities Increase (Decrease) in Restricted Cash Other investing activities, net Payments for (Proceeds from) Other Investing Activities Cash flows provided by investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Borrowings from debt obligations Proceeds from Issuance of Debt Repayments and repurchases of debt obligations Repayments of Debt Proceeds from loan participations payable Proceeds from Loan Participations Payable Proceeds from Loan Participations Payable Preferred dividends paid Payments of Ordinary Dividends, Preferred Stock and Preference Stock Repurchase of stock Payments for Repurchase of Common Stock Redemption of HPUs CashpaidforredemptionofHPUs CashpaidforredemptionofHPUs Payments for deferred financing costs Payments of Financing Costs Other financing activities, net Proceeds from (Payments for) Other Financing Activities Cash flows provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate changes on cash Effect of Exchange Rate on Cash and Cash Equivalents Changes in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents at beginning of period Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at end of period Supplemental disclosure of cash flow information: Supplemental Cash Flow Information [Abstract] Cash paid during the period for interest, net of amount capitalized Interest Paid, Net Supplemental disclosure of non-cash investing and financing activity: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Fundings and repayments of loan receivables and loan participations, net Loans Assumed (Issued) Loans Assumed (Issued) Developer fee payable Profit Sharing Payable1 Profit Sharing Payable1 Acquisitions of real estate and land and development assets through deed-in-lieu Real Estate Owned, Transfer to Real Estate Owned Acquisitions of equity method investment assets through deed-in-lieu Acquisition of Equity Method Investment Assets Through Deed-in-Lieu Acquisition of Equity Method Investment Assets Through Deed-in-Lieu Contributions of real estate and land and development assets to equity method investments, net Transfer to Investments Accounts payable for capital expenditures on land and development assets Capital Expenditures Incurred but Not yet Paid on Land and Development Assets Capital Expenditures Incurred but Not yet Paid on Land and Development Assets Accounts payable for capital expenditures on real estate assets Capital Expenditures Incurred but Not yet Paid on Real Estate Assets Capital Expenditures Incurred but Not yet Paid on Real Estate Assets Redemption of HPUs in exchange for common stock Noncash or Part Noncash, Redemption of High Performance Units Noncash or Part Noncash, Redemption of High Performance Units Receivable from sales of real estate and land parcels Receivable for sales proceeds Receivable for sales proceeds 2017 Operating Leases, Future Minimum Payments Receivable, Current 2018 Operating Leases, Future Minimum Payments Receivable, in Two Years 2019 Operating Leases, Future Minimum Payments Receivable, in Three Years 2020 Operating Leases, Future Minimum Payments Receivable, in Four Years 2021 Operating Leases, Future Minimum Payments Receivable, in Five Years Fair Values Fair Value Disclosures [Text Block] Document and Entity Information [Abstract] -- None. No documentation exists for this element. -- Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Entity Public Float Entity Public Float Individually Evaluated for Impairment Individually Evaluated for Impairment [Member] Individually Evaluated for Impairment [Member] Non-performing mortgage Non-Performing First Mortgage [Member] Represents the non-performing loans secured by real property that have a first (highest) lien on such property in the event of default by the borrower. Loan Payment Extension Period [Axis] Loan Payment Extension Period [Axis] Loan Payment Extension Period [Axis] Loan Payment Extension Period [Domain] Loan Payment Extension Period [Domain] [Domain] for Loan Payment Extension Period [Axis] One Year Payment Extension One Year Payment Extension [Member] One Year Payment Extension [Member] Pre-modification outstanding recorded investment Financing Receivable, Pre Modification Recorded Investment The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings before the financing receivable has been modified. Number of loans Finance Receivable, Troubled Loans The number of financing receivables that have been modified by troubled debt restructurings. Recorded investment of loans whose maturity was extended Financing Receivable Modifications Recorded Investment of Contracts Whose Maturity Extended Represents the amount of the outstanding recorded investment related to financing receivables for which the maturity was extended and that has been modified by troubled debt restructurings. Finance receivable, trouble debt restructuring time period Finance Receivable, Trouble Debt Restructuring Time Period Represents the weighted average maturity period of loans. Unfunded commitments, troubled debt restructurings Financing Receivable Modifications Unfunded Commitments Represents the amount of the outstanding unfunded commitment related to financing receivables that has been modified by troubled debt restructurings. Schedule of other investments and its proportionate share of results for equity method investments Equity Method Investments [Table Text Block] Summary of financial information of the equity method investments Equity Method Investments, Summarized Financial Information [Table Text Block] [Table Text Block] for Equity Method Investments, Summarized Financial Information [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Other Assets Other Assets [Member] Other Liabilities Other Liabilities [Member] Derivative financial instruments on consolidated balance sheets Derivatives, Fair Value [Line Items] Derivative Assets, Fair Value Derivative Asset, Fair Value, Gross Asset Derivative Liabilities, Fair Value Derivative Liability, Fair Value, Gross Liability Tenant reimbursements Tenant Reimbursements ASSETS Assets [Abstract] Real estate, at cost Real Estate Investment Property, Held for Use, Gross Real Estate Investment Property, Held for Use, Gross Less: accumulated depreciation Real Estate Investment Property, Accumulated Depreciation Real estate, net Cash and cash equivalents Accrued interest and operating lease income receivable, net Accrued Interest and Operating Lease Income Receivable Net This element represents interest, rents, ancillary and operating lease income earned but not yet received by the entity on its loans and other lending investments and net lease assets. Deferred operating lease income receivable, net Deferred Rent Receivables, Net Deferred expenses and other assets, net Deferred Expenses and Other Assets Net This element represents net amount of other deferred expenses and other assets capitalized at the end of the reporting period. LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Liabilities: Liabilities [Abstract] Accounts payable, accrued expenses and other liabilities Loan participations payable, net Total liabilities Liabilities Commitments and contingencies (refer to Note 11) Commitments and Contingencies Redeemable noncontrolling interests (refer to Note 5) Redeemable Noncontrolling Interest, Equity, Carrying Amount Equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] iStar Inc. shareholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred Stock Preferred Stock, Value, Issued Common Stock, $0.001 par value, 200,000 shares authorized, 72,042 and 81,109 shares issued and outstanding as of December 31, 2016 and 2015, respectively Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Retained earnings (deficit) Retained Earnings (Accumulated Deficit) Accumulated other comprehensive income (loss) (refer to Note 13) Accumulated Other Comprehensive Income (Loss), Net of Tax Total iStar Inc. shareholders' equity Stockholders' Equity Attributable to Parent Noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest Total equity Total liabilities and equity Liabilities and Equity Other Commitments [Table] Other Commitments [Table] Land Transaction Type [Axis] Transaction Type [Axis] Transaction [Domain] Transaction [Domain] Real Estate Sales Real Estate Sales [Member] Real Estate Sales [Member] Other Commitments [Line Items] Other Commitments [Line Items] Land subject to litigation LandSubjecttoLitigation Land acreage subject to litigation. Unpaid purchase price Unpaid Purchase Price Unpaid Purchase Price Unpaid purchase price, interest rate Unpaid Purchase Price, Interest Rate Unpaid Purchase Price, Interest Rate Noncontrolling interest, ownership percentage by noncontrolling owners Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners Derivative [Table] Derivative [Table] Derivative, by Nature [Axis] Derivative, by Nature [Axis] Derivative, Name [Domain] Derivative, Name [Domain] Forward Contracts Forward Contracts [Member] Derivative [Line Items] Derivative [Line Items] Collateral posted for hedges Collateral Posted For Hedges Collateral Posted For Hedges Net exposure under contracts Derivative Liability, Fair Value, Amount Offset Against Collateral Financial Instrument Performance Status [Axis] Financial Instrument Performance Status [Axis] Financial Instrument Performance Status [Domain] Financial Instrument Performance Status [Domain] Recorded investment (comprised of a loans carrying value plus accrued interest) in loans and the associated reserve for loan losses Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] Financing receivable, gross Individually evaluated for impairment, reserves for loan losses Total Individually evaluated for impairment, net discount Unamortized Discount Premium Deferred Fees and Costs, Individually Evaluated for Impairment Represents the unamortized discounts, premiums, deferred fees and costs relating to loans individually evaluated for impairment and shown as a net premium (discount). Release of general reserve Allowance for Loan Losses Write-Offs Reflects the amount of loans that have been removed, or charged off, from both loan receivables and the reserve for credit losses, typically because they are considered to be not salvageable or have been purchased by unconsolidated collection entities. Collectively evaluated for impairment, net discount Unamortized Discount Premium Deferred Fees and Costs Collectively Evaluated for Impairment Represents the unamortized discounts, premiums, deferred fees and costs relating to loans collectively evaluated for impairment and shown as a net premium (discount). Loans Receivable Allowance Allowance for Loan Losses [Roll Forward] Allowance for Loan and Lease Losses [Roll Forward] Reserve for loan losses at beginning of period Loans Receivable Allowance The allowance for loan losses represents the reserve to cover probable credit losses related to specifically identified loans, as well as probable credit losses inherent in the remainder of the loan portfolio as of the balance sheet date. Provision for (recovery of) loan losses Charge-offs Reserve for loan losses at end of period Recoveries of previously recorded loan loss reserves Allowance for Loan and Lease Loss, Recovery of Bad Debts Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Accumulated other comprehensive income (loss) Unrealized gains (losses) on available-for-sale securities Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] Unrealized gains (losses) on cash flow hedges Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] Unrealized losses on cumulative translation adjustment Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Accumulated other comprehensive income (loss) Total liabilities Equity Method Investment, Summarized Financial Information, Liabilities Noncontrolling interests Equity Method Investment, Summarized Financial Information, Noncontrolling Interest Total equity Equity Method Investment, Summarized Financial Information, Equity Excluding Noncontrolling Interests Revenues Equity Method Investment, Summarized Financial Information, Revenue Expenses Equity Method Investment, Summarized Financial Information, Cost of Sales Net income attributable to parent entities Equity Method Investment, Summarized Financial Information, Net Income (Loss) SEC Schedule III, Real Estate and Accumulated Depreciation, by Property [Table] SEC Schedule III, Real Estate and Accumulated Depreciation, by Property [Table] Real Estate and Accumulated Depreciation Type of Property [Axis] Real Estate and Accumulated Depreciation Type of Property [Axis] The axis of a table defines the relationship between the domain members or categories in the table and the line items or concepts that complete the table. The axis of a table defines the relationship between the domain members or categories in the table a Real Estate and Accumulated Depreciation Type of Property [Domain] Real Estate and Accumulated Depreciation Type of Property [Domain] Real Estate and Accumulated Depreciation Type of Property [Domain] Office Facilities Commercial Office Real Estate [Member] Represents property that is used for offices. Industrial Facilities Commercial Industrial Research and Development Real Estate [Member] Represents commercial property that is used for industrial or research and development activities. Entertainment Commercial Entertainment and Leisure Real Estate [Member] Represents commercial property that is used for entertainment and leisure activities. Retail Retail Site [Member] Hotel Hotel [Member] Apartment/Residential Residential Real Estate [Member] Mixed Use Collateral Mixed Use Collateral [Member] Represents real estate properties that have mixed use. Land and Land Development Assets Land and Land Development Assets [Member] Land and Land Development Assets [Member] Name of Property [Axis] Name of Property [Axis] Name of Property [Domain] Name of Property [Domain] Arizona OAZ 002 Arizona OAZ 002 [Member] Represents information pertaining to Arizona OAZ002. Arizona OAZ 003 Arizona OAZ 003 [Member] Represents information pertaining to Arizona OAZ003. Arizona OAZ 004 Arizona OAZ 004 [Member] Represents information pertaining to Arizona OAZ004. Arizona OAZ 005 Arizona OAZ 005 [Member] Represents information pertaining to Arizona OAZ005. Colorado OCO 001 Colorado OCO 001 [Member] Represents information pertaining to Colorado OCO001. Colorado OCO 002 Colorado OCO 002 [Member] Represents information pertaining to Colorado OCO002. Maryland OMD 001 Maryland OMD 001 [Member] Represents information pertaining to Maryland OMD001. Massachusetts OMA 001 Massachusetts OMA 001 [Member] Represents information pertaining to Massachusetts OMA001. New Jersey ONJ 001 New Jersey ONJ 001 [Member] Represents information pertaining to New Jersey ONJ001. New Jersey ONJ 002 New Jersey ONJ 002 [Member] Represents information pertaining to New Jersey ONJ002. New Jersey ONJ 003 New Jersey ONJ 003 [Member] Represents information pertaining to New Jersey ONJ003. Pennsylvania OPA 001 Pennsylvania OPA 001 [Member] Represents information pertaining to Pennsylvania OPA 001. Texas OTX 001 Texas OTX 001 [Member] Represents information pertaining to Texas OTX 001. Texas OTX 002 Texas OTX 002 [Member] Represents information pertaining to Texas OTX 002. Texas OTX 004 Texas OTX 004 [Member] Represents information pertaining to Texas OTX 004. Arizona IAZ 001 Arizona IAZ 001 [Member] Represents information pertaining to Arizona IAZ 001. Arizona IAZ 002 Arizona IAZ 002 [Member] Represents information pertaining to Arizona IAZ 002. California ICA 001 California ICA 001 [Member] Represents information pertaining to California ICA 001. California ICA 006 California ICA 006 [Member] Represents information pertaining to California ICA 006. California ICA 016 California ICA 016 [Member] Represents information pertaining to California ICA 016. Colorado ICO 001 Colorado ICO 001 [Member] Represents information pertaining to Colorado ICO 001. Florida IFL 002 Florida IFL 002 [Member] Represents information pertaining to Florida IFL 002. Florida IFL 004 Florida IFL 004 [Member] Represents information pertaining to Florida IFL 004. Florida IFL 005 Florida IFL 005 [Member] Represents information pertaining to Florida IFL 005. Georgia IGA 001 Georgia IGA 001 [Member] Represents information pertaining to Georgia IGA 001. Indiana IIN 001 Indiana IIN 001 [Member] Represents information pertaining to Indiana IIN001. Massachusetts IMA 001 Massachusetts IMA 001 [Member] Represents information pertaining to Massachusetts IMA001. Michigan IMI 001 Michigan IMI 001 [Member] Represents information pertaining to Michigan IMI001. Minnesota IMN 001 Minnesota IMN 001 [Member] Represents information pertaining to Minnesota IMN001. Minnesota IMN 002 Minnesota IMN 002 [Member] Represents information pertaining to Minnesota IMN002. New Jersey INJ 001 New Jersey INJ 001 [Member] Represents information pertaining to New Jersey INJ001. Oklahoma IOK 001 Oklahoma IOK 001 [Member] Oklahoma IOK 001 [Member] Texas ITX 004 Texas ITX 004 [Member] Texas ITX 004 [Member] Texas ITX 005 Texas ITX 005 [Member] Texas ITX 005 [Member] Virginia IVA 001 Virginia IVA 001 [Member] Represents information pertaining to Virginia IVA 001. Arizona LAZ 002 Arizona LAZ 002 [Member] Arizona LAZ 002 [Member] Arizona LAZ 003 Arizona LAZ 003 [Member] [Member] Arizona LAZ 003 [Member] [Member] Arizona LAZ 001 Arizona LAZ 001 [Member] Represents information pertaining to Arizona LAZ001. California LCA 002 California LCA 002 [Member] Represents information pertaining to California LCA002. California LCA 003 California LCA 003 [Member] Represents information pertaining to California LCA003. California LCA 004 California LCA 004 [Member] Represents information pertaining to California LCA004. California LCA 005 California LCA 005 [Member] Represents information pertaining to California LCA005. California LCA 006 California LCA 006 [Member] Represents information pertaining to California LCA006. Florida LFA 001 Florida LFA 001 [Member] Represents information pertaining to Florida LFA001. Florida LFA 002 Florida LFA 002 [Member] Represents information pertaining to Florida LFA002. Florida LFA 007 Florida LFA 007 [Member] Florida LFA 007 [Member] Flordia LFA 006 Florida LFA 006 [Member] Florida LFA 006 [Member] Florida LFA 003 Florida LFA 003 [Member] Represents information pertaining to Florida LFA003. Florida LFA 004 Florida LFA 004 [Member] Represents information pertaining to Florida LFA004. Florida LFA 005 Florida LFA 005 [Member] Represents information pertaining to Florida LFA005. Georgia LGA 001 Georgia LGA 001 [Member] Georgia LGA 001 [Member] Georgia LGA 002 Georgia LGA 002 [Member] Georgia LGA 002 [Member] Georgia LGA 003 Georgia LGA 003 [Member] Georgia LGA 003 [Member] Illinois LIL 001 Illinois LIL 001 [Member] Illinois LIL 001 [Member] Maryland LMD 001 Maryland LMD 001 [Member] Represents information pertaining to Maryland LMD001. Maryland LMD 002 Maryland LMD 002 [Member] Represents information pertaining to Maryland LMD002. Michigan LMI 001 Michigan LMI 001 [Member] Michigan LMI 001 [Member] New Jersey LNJ 001 New Jersey LNJ 001 [Member] Represents information pertaining to New Jersey LNJ001. New York LNY 002 New York LNY 002 [Member] Represents information pertaining to New York LNY002. New York LNY 003 New York LNY 003 [Member] New York LNY 003 [Member] New York LNY 001 New York LNY 001 [Member] Represents information pertaining to New York LNY001. Oregon LOR 001 Oregon LOR 001 [Member] Oregon LOR 001 [Member] Pennsylvania LPA 001 Pennsylvania LPA 001 [Member] Pennsylvania LPA 001 [Member] Texas LTX 001 Dallas, Texas LTX001 [Member] Dallas, Texas LTX001 [Member] Texas LTX 002 Dallas, Texas LTX002 [Member] Dallas, Texas LTX002 [Member] Virginia LVA 001 Chesterfield County, Virginia LVA001 [Member] Chesterfield County, Virginia LVA001 [Member] West Virginia LWV 001 Ranson, West Virginia LWV001 [Member] Ranson, West Virginia LWV001 [Member] Alabama EAL 001 Alabama EAL 001 [Member] Represents information pertaining to Alabama EAL001. Alabama EAL 002 Alabama EAL 002 [Member] Represents information pertaining to Alabama EAL002. Arizona EAZ 001 Arizona EAZ 001 [Member] Represents information pertaining to Arizona EAZ001. Arizona EAZ 002 Arizona EAZ 002 [Member] Represents information pertaining to Arizona EAZ002. Arizona EAZ 004 Arizona EAZ 004 [Member] Represents information pertaining to Arizona EAZ004. Arizona EAZ 005 Arizona EAZ 005 [Member] Represents information pertaining to Arizona EAZ005. Arizona EAZ 006 Arizona EAZ 006 [Member] Represents information pertaining to Arizona EAZ006. Arizona EAZ 007 Arizona EAZ 007 [Member] Represents information pertaining to Arizona EAZ007. Arizona EAZ 008 Arizona EAZ 008 [Member] Represents information pertaining to Arizona EAZ008. Arizona EAZ 009 Arizona EAZ 009 [Member] Represents information pertaining to Arizona EAZ009. California ECA 001 California ECA 001 [Member] Represents information pertaining to California ECA001. California ECA 002 California ECA 002 [Member] Represents information pertaining to California ECA002. California ECA 003 California ECA 003 [Member] Represents information pertaining to California ECA003. California ECA 005 California ECA 005 [Member] Represents information pertaining to California ECA005. California ECA 006 California ECA 006 [Member] Represents information pertaining to California ECA006. California ECA 007 California ECA 007 [Member] Represents information pertaining to California ECA007. California ECA 008 California ECA 008 [Member] Represents information pertaining to California ECA008. California ECA 009 California ECA 009 [Member] Represents information pertaining to California ECA009. California ECA 010 California ECA 010 [Member] Represents information pertaining to California ECA010. California ECA 011 California ECA 011 [Member] Represents information pertaining to California ECA011. California ECA 013 California ECA 013 [Member] Represents information pertaining to California ECA013. California ECA 014 California ECA 014 [Member] Represents information pertaining to California ECA014. California ECA 015 California ECA 015 [Member] Represents information pertaining to California ECA015. California ECA 004 California ECA 004 [Member] Represents information pertaining to California ECA004. Colorado ECO 002 Colorado ECO 002 [Member] Represents information pertaining to Colorado ECO002. Colorado ECO 003 Colorado ECO 003 [Member] Represents information pertaining to Colorado ECO003. Colorado ECO 004 Colorado ECO 004 [Member] Represents information pertaining to Colorado ECO004. Colorado ECO 006 Colorado ECO 006 [Member] Represents information pertaining to Colorado ECO006. Connecticut ECT 001 Connecticut ECT 001 [Member] Represents information pertaining to Connecticut ECT001. Delaware EDE 001 Delaware EDE 001 [Member] Represents information pertaining to Delaware EDE001. Florida EFL 001 Florida EFL 001 [Member] Represents information pertaining to Florida EFL001. Florida EFL 002 Florida EFL 002 [Member] Represents information pertaining to Florida EFL002. Florida EFL 003 Florida EFL 003 [Member] Represents information pertaining to Florida EFL003. Florida EFL 004 Florida EFL 004 [Member] Represents information pertaining to Florida EFL004. Florida EFL 006 Florida EFL 006 [Member] Represents information pertaining to Florida EFL006. Florida EFL 008 Florida EFL 008 [Member] Represents information pertaining to Florida EFL008. Florida EFL 009 Florida EFL 009 [Member] Represents information pertaining to Florida EFL009. Florida EFL 011 Florida EFL 011 [Member] Represents information pertaining to Florida EFL011. Florida EFL 012 Florida EFL 012 [Member] Represents information pertaining to Florida EFL012. Florida EFL 014 Florida EFL 014 [Member] Represents information pertaining to Florida EFL014. Florida EFL 016 Florida EFL 016 [Member] Represents information pertaining to Florida EFL016. Florida EFL 018 Florida EFL 018 [Member] Represents information pertaining to Florida EFL018. Florida EFL 019 Florida EFL 019 [Member] Represents information pertaining to Florida EFL019. Florida EFL 020 Florida EFL 020 [Member] Represents information pertaining to Florida EFL020. Florida EFL 021 Florida EFL 021 [Member] Represents information pertaining to Florida EFL021. Florida EFL 022 Florida EFL 022 [Member] Represents information pertaining to Florida EFL022. Florida EFL 023 Florida EFL 023 [Member] Represents information pertaining to Florida EFL023. Georgia EGA 001 Georgia EGA 001 [Member] Represents information pertaining to Georgia EGA001. Georgia EGA 002 Georgia EGA 002 [Member] Represents information pertaining to Georgia EGA002. Georgia EGA 003 Georgia EGA 003 [Member] Represents information pertaining to Georgia EGA003. Georgia EGA 004 Georgia EGA 004 [Member] Represents information pertaining to Georgia EGA004. Georgia EGA 005 Georgia EGA 005 [Member] Represents information pertaining to Georgia EGA005. Georgia EGA 007 Georgia EGA 007 [Member] Represents information pertaining to Georgia EGA007. Illinois EIL 001 Illinois EIL 001 [Member] Represents information pertaining to Illinois EIL001. Illinois EIL 002 Illinois EIL 002 [Member] Represents information pertaining to Illinois EIL002. Illinois EIL 003 Illinois EIL 003 [Member] Represents information pertaining to Illinois EIL003. Illinois EIL 004 Illinois EIL 004 [Member] Represents information pertaining to Illinois EIL004. Illinois EIL 005 Illinois EIL 005 [Member] Represents information pertaining to Illinois EIL005. Indiana EIN 001 Indiana EIN 001 [Member] Represents information pertaining to Indiana EIN001. Kentucky EKY 001 Kentucky EKY 001 [Member] Represents information pertaining to Kentucky EKY001. Kentucky EKY 002 Kentucky EKY 002 [Member] Represents information pertaining to Kentucky EKY002. Maryland EMD 001 Maryland EMD 001 [Member] Represents information pertaining to Maryland EMD001. Maryland EMD 002 Maryland EMD 002 [Member] Represents information pertaining to Maryland EMD002. Maryland EMD 003 Maryland EMD 003 [Member] Represents information pertaining to Maryland EMD003. Maryland EMD 004 Maryland EMD 004 [Member] Represents information pertaining to Maryland EMD004. Maryland EMD 006 Maryland EMD 006 [Member] Represents information pertaining to Maryland EMD006. Maryland EMD 007 Maryland EMD 007 [Member] Represents information pertaining to Maryland EMD007. Maryland EMD 008 Maryland EMD 008 [Member] Represents information pertaining to Maryland EMD008. Maryland EMD 009 Maryland EMD 009 [Member] Represents information pertaining to Maryland EMD009. Maryland EMD 011 Maryland EMD 011 [Member] Represents information pertaining to Maryland EMD011. Massachusetts EMA 001 Massachusetts EMA 001 [Member] Represents information pertaining to Massachusetts EMA001. Massachusetts EMA 002 Massachusetts EMA 002 [Member] Represents information pertaining to Massachusetts EMA002. Massachusetts EMA 003 Massachusetts EMA 003 [Member] Represents information pertaining to Massachusetts EMA003. Massachusetts EMA 004 Massachusetts EMA 004 [Member] Represents information pertaining to Massachusetts EMA004. Michigan EMI 002 Michigan EMI 002 [Member] Represents information pertaining to Michigan EMI002. Michigan EMI 003 Michigan EMI 003 [Member] Represents information pertaining to Michigan EMI003. Michigan EMI 004 Michigan EMI 004 [Member] Represents information pertaining to Michigan EMI004. Michigan EMI 005 Michigan EMI 005 [Member] Represents information pertaining to Michigan EMI005. Minnesota EMN 001 Minnesota EMN 001 [Member] Represents information pertaining to Minnesota EMN001. Minnesota EMN 002 Minnesota EMN 002 [Member] Represents information pertaining to Minnesota EMN002. Minnesota EMN 004 Minnesota EMN 004 [Member] Represents information pertaining to Minnesota EMN004. Missouri EMO 001 Missouri EMO 001 [Member] Represents information pertaining to Missouri EMO001. Missouri EMO 004 Missouri EMO 004 [Member] Represents information pertaining to Missouri EMO004. New Jersey ENJ 001 New Jersey ENJ 001 [Member] Represents information pertaining to New Jersey ENJ001. New Jersey ENJ 002 New Jersey ENJ 002 [Member] Represents information pertaining to New Jersey ENJ002. Nevada ENV 001 Nevada ENV 001 [Member] Represents information pertaining to Nevada ENV001. New York ENY 001 New York ENY 001 [Member] Represents information pertaining to New York ENY001. New York ENY 002 New York ENY 002 [Member] Represents information pertaining to New York ENY002. New York ENY 004 New York ENY 004 [Member] Represents information pertaining to New York ENY004. New York ENY 005 New York ENY 005 [Member] Represents information pertaining to New York ENY005. New York ENY 007 New York ENY 007 [Member] Represents information pertaining to New York ENY007. New York ENY 006 New York ENY 006 [Member] Represents information pertaining to New York ENY006. New York ENY 008 New York ENY 008 [Member] Represents information pertaining to New York ENY008. New York ENY 009 New York ENY 009 [Member] Represents information pertaining to New York ENY009. New York ENY 010 New York ENY 010 [Member] Represents information pertaining to New York ENY010. New York ENY 011 New York ENY 011 [Member] Represents information pertaining to New York ENY011. New York ENY 012 New York ENY 012 [Member] Represents information pertaining to New York ENY012. New York ENY 013 New York ENY 013 [Member] Represents information pertaining to New York ENY013. New York ENY 014 New York ENY 014 [Member] Represents information pertaining to New York ENY014. New York ENY 015 New York ENY 015 [Member] Represents information pertaining to New York ENY015. New York ENY 016 New York ENY 016 [Member] Represents information pertaining to New York ENY016. New York ENY 017 New York ENY 017 [Member] Represents information pertaining to New York ENY017. New York ENY 018 New York ENY 018 [Member] Represents information pertaining to New York ENY018. North Carolina ENC 001 North Carolina ENC 001 [Member] Represents information pertaining to North Carolina ENC001. North Carolina ENC 002 North Carolina ENC 002 [Member] Represents information pertaining to North Carolina ENC002. North Carolina ENC 003 North Carolina ENC 003 [Member] Represents information pertaining to North Carolina ENC003. North Carolina ENC 004 North Carolina ENC 004 [Member] Represents information pertaining to North Carolina ENC004. North Carolina ENC 005 North Carolina ENC 005 [Member] Represents information pertaining to North Carolina ENC005. North Carolina ENC 006 North Carolina ENC 006 [Member] Represents information pertaining to North Carolina ENC006. North Carolina ENC 007 North Carolina ENC 007 [Member] Represents information pertaining to North Carolina ENC007. North Carolina ENC 008 North Carolina ENC 008 [Member] Represents information pertaining to North Carolina ENC008. North Carolina ENC 009 North Carolina ENC 009 [Member] Represents information pertaining to North Carolina ENC009. North Carolina ENC 010 North Carolina Enc 010 [Member] Represents information pertaining to North Carolina ENC010. North Carolina ENC 011 North Carolina ENC 011 [Member] Represents information pertaining to North Carolina ENC011. North Carolina ENC 012 North Carolina ENC 012 [Member] Represents information pertaining to North Carolina ENC012. Ohio EOH 001 Ohio EOH 001 [Member] Represents information pertaining to Ohio EOH001. Ohio EOH 002 Ohio EOH 002 [Member] Represents information pertaining to Ohio EOH002. Ohio EOH 003 Ohio EOH 003 [Member] Represents information pertaining to Ohio EOH003. Ohio EOH 004 Ohio EOH 004 [Member] Represents information pertaining to Ohio EOH004. Oklahoma EOK 001 Oklahoma EOK 001 [Member] Represents information pertaining to Oklahoma EOK001. Oklahoma EOK 002 Oklahoma EOK 002 [Member] Represents information pertaining to Oklahoma EOK002. Oregon EOR 002 Oregon EOR 002 [Member] Represents information pertaining to Oregon EOR002. Pennsylvania EPA 001 Pennsylvania EPA 001 [Member] Represents information pertaining to Pennsylvania EPA001. Pennsylvania EPA 002 Pennsylvania EPA 002 [Member] Represents information pertaining to Pennsylvania EPA002. Pennsylvania EPA 003 Pennsylvania EPA 003 [Member] Represents information pertaining to Pennsylvania EPA003. Pennsylvania EPA 004 Pennsylvania EPA 004 [Member] Represents information pertaining to Pennsylvania EPA004. Puerto Rico EPR 001 Puerto Rico EPR 001 [Member] Represents information pertaining to Puerto Rico EPR001. Rhode Island ERI 001 Rhode Island ERI 001 [Member] Represents information pertaining to Rhode Island ERI001. South Carolina ESC 002 South Carolina ESC 002 [Member] Represents information pertaining to South Carolina ESC002. Texas ETX 001 Texas ETX 001 [Member] Represents information pertaining to Texas ETX001. Texas ETX 002 Texas ETX 002 [Member] Represents information pertaining to Texas ETX002. Texas ETX 004 Texas ETX 004 [Member] Represents information pertaining to Texas ETX004. Texas ETX 005 Texas ETX 005 [Member] Represents information pertaining to Texas ETX005. Texas ETX 006 Texas ETX 006 [Member] Represents information pertaining to Texas ETX006. Texas ETX 007 Texas ETX 007 [Member] Represents information pertaining to Texas ETX007. Texas ETX 008 Texas ETX 008 [Member] Represents information pertaining to Texas ETX008. Texas ETX 009 Texas ETX 009 [Member] Represents information pertaining to Texas ETX009. Texas ETX 010 Texas ETX 010 [Member] Represents information pertaining to Texas ETX010. Texas ETX 011 Texas ETX 011 [Member] Represents information pertaining to Texas ETX011. Texas ETX 013 Texas ETX 013 [Member] Represents information pertaining to Texas ETX013. Texas ETX 014 Texas ETX 014 [Member] Represents information pertaining to Texas ETX014. Texas ETX 017 Texas ETX 017 [Member] Represents information pertaining to Texas ETX017. Texas ETX 018 Texas ETX 018 [Member] Represents information pertaining to Texas ETX018. Texas ETX 019 Texas ETX 019 [Member] Represents information pertaining to Texas ETX019. Texas ETX 020 Texas ETX 020 [Member] Represents information pertaining to Texas ETX020. Texas ETX 021 Texas ETX 021 [Member] Represents information pertaining to Texas ETX021. Texas ETX 022 Texas ETX 022 [Member] Represents information pertaining to Texas ETX022. Virginia EVA 001 Virginia EVA 001 [Member] Represents information pertaining to Virginia EVA001. Virginia EVA 002 Virginia EVA 002 [Member] Represents information pertaining to Virginia EVA002. Virginia EVA 003 Virginia EVA 003 [Member] Represents information pertaining to Virginia EVA003. Virginia EVA 004 Virginia EVA 004 [Member] Represents information pertaining to Virginia EVA004. Virginia EVA 005 Virginia EVA 005 [Member] Represents information pertaining to Virginia EVA005. Virginia EVA 006 Virginia EVA 006 [Member] Represents information pertaining to Virginia EVA006. Virginia EVA 007 Virginia EVA 007 [Member] Represents information pertaining to Virginia EVA007. Virginia EVA 008 Virginia EVA 008 [Member] Represents information pertaining to Virginia EVA008. Virginia EVA 009 Virginia EVA 009 [Member] Represents information pertaining to Virginia EVA009. Virginia EVA 010 Virginia EVA 010 [Member] Represents information pertaining to Virginia EVA010. Virginia EVA 011 Virginia EVA 011 [Member] Represents information pertaining to Virginia EVA011. Virginia EVA 012 Virginia EVA 012 [Member] Represents information pertaining to Virginia EVA012. Virginia EVA 013 Virginia EVA 013 [Member] Represents information pertaining to Virginia EVA013. Washington EWA 001 Washington EWA 001 [Member] Represents information pertaining to Washington EWA001. Wisconsin EWI 001 Wisconsin EWI 001 [Member] Represents information pertaining to Wisconsin EWI001. Wisconsin EWI 002 Wisconsin EWI 002 [Member] Represents information pertaining to Wisconsin EWI002. Wisconsin EWI 004 Wisconsin EWI 004 [Member] Represents information pertaining to Wisconsin EWI004. Wisconsin EWI 005 Wisconsin EWI 005 [Member] Represents information pertaining to Wisconsin EWI005. Arizona RAZ 003 Arizona RAZ 003 [Member] Represents information pertaining to Arizona RAZ003. Arizona RAZ 004 Arizona RAZ 004 [Member] Represents information pertaining to Arizona RAZ004. Arizona RAZ 005 Arizona RAZ 005 [Member] Represents information pertaining to Arizona RAZ005. Colorado RCO 001 Colorado RCO 001 [Member] Represents information pertaining to Colorado RCO001. Florida RFL 003 Florida RFL 003 [Member] Represents information pertaining to Florida RFL003. Hawaii RHI 001 Hawaii RHI 001 [Member] Represents information pertaining to Hawaii RHI001. Illinois RIL 002 Illinois RIL 002 [Member] Illinois RIL 002 [Member] Illinois RIL 001 Illinois RIL 001 [Member] Represents information pertaining to Illinois RIL001. New Mexico RNM 001 New Mexico RNM 001 [Member] Represents information pertaining to New Mexico RNM001. New York RNY 001 New York RNY 001 [Member] Represents information pertaining to New York RNY001. South Carolina RSC 001 South Carolina RSC 001 [Member] Represents information pertaining to South Carolina RSC001. Texas RTX 001 Texas RTX 001 [Member] Represents information pertaining to Texas RTX001. Utah RUT 001 Utah RUT 001 [Member] Represents information pertaining to Utah RUT001. Virginia RVA 001 Virginia RVA 001 [Member] Represents information pertaining to Virginia RVA001. California HCA 002 California HCA 002 [Member] Represents information pertaining to California HCA002. California HCA 003 California HCA 003 [Member] Represents information pertaining to California HCA003. Colorado HCO 001 Colorado HCO 001 [Member] Represents information pertaining to Colorado HCO001. Georgia HGA 001 Georgia HGA 001 [Member] Georgia HGA 001 [Member] Hawaii HHI 001 Hawaii HHI 001 [Member] Represents information pertaining to Hawaii HHI001. Hawaii HHI 002 Hawaii HHI 002 [Member] Represents information pertaining to Hawaii HHI002. New Jersey HNJ 001 New Jersey HNJ 001 [Member] New Jersey HNJ 001 [Member] Utah HUT 001 Utah HUT 001 [Member] Represents information pertaining to Utah HUT001. Washington HWA 004 Washington HWA 004 [Member] Represents information pertaining to Washington HWA004. Arizona AAZ 001 Arizona AAZ 001 [Member] Represents information pertaining to Arizona AAZ001. Arizona AAZ 002 Arizona AAZ 002 [Member] Arizona AAZ 002 [Member] California ACA 002 California ACA 002 [Member] Represents information pertaining to California ACA002. Georgia AGA 001 Georgia AGA 001 [Member] Georgia AGA 001 [Member] New Jersey ANJ 001 New Jersey ANJ 001 [Member] Represents information pertaining to New Jersey ANJ001. Pennsylvania APA 001 Pennsylvania APA 001 [Member] Pennsylvania APA 001 [Member] Pennsylvania APA 002 Pennsylvania APA 002 [Member] Pennsylvania APA 002 [Member] Washington AWA 002 Washington AWA 002 [Member] Washington AWA 002 [Member] Wisconsin OWI 001 Wisconsin OWI 001 [Member] Represents information pertaining to Wisconsin OWI 001. Arizona MAZ 002 Arizona MAZ 002 [Member] Arizona MAZ 002 [Member] California MCA 001 California MCA 001 [Member] Represents information pertaining to California MCA001. Florida MFL 002 Florida MFL 002 [Member] Florida MFL 002 [Member] Florida MFL 003 Florida MFL 003 [Member] Florida MFL 003 [Member] Florida MFL 004 Florida MFL 004 [Member] Florida MFL 004 [Member] Georgia MGA 001 Georgia MGA 001 [Member] Represents information pertaining to Georgia MGA001. SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items] SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items] Encumbrances SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances Initial Cost to Company, Land SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land Initial Cost to Company, Building and Improvements SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements Cost Capitalized Subsequent to Acquisition SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements Gross Amount Carried at Close of Period, Land SEC Schedule III, Real Estate and Accumulated Depreciation, Carrying Amount of Land Gross Amount Carried at Close of Period, Building and Improvements SEC Schedule III, Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements Gross Amount Carried at Close of Period, Total Accumulated Depreciation Depreciable Life SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation Properties pledged as collateral Properties Pledged as Collateral Book Value Represents the book value of properties pledged as collateral. Aggregate cost for federal income tax purposes Aggregate Cost for Federal Income Tax Purposes Aggregate Cost for Federal Income Tax Purposes Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Earnings Per Share Type [Axis] Earnings Per Share Type [Axis] Earnings Per Share Type [Axis] Earnings per share type [Domain] Earnings per share type [Domain] [Domain] for Earnings per share type [Axis] Basic Basic [Member] Basic [Member] Diluted Diluted [Member] Diluted [Member] Basic and Diluted Basic and Diluted [Member] Basic and Diluted [Member] Earnings allocable to common shares: Share-based Compensation, Allocation and Classification in Financial Statements [Abstract] Numerator for basic earnings per share: Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Income (loss) from operations attributable to iStar Inc. and allocable to common shareholders Income (Loss) from Continuing Operations, Attributable to Parent and Available to Common Shareholders The income or loss from continuing operations during the period which is attributable to the parent and is available to common shareholders. Net income (loss) attributable to iStar Inc. and allocable to common shareholders Net Income (Loss) Attributable to Parent and Available to Common Shareholders Net Income (Loss) Attributable to Parent and Available to Common Shareholders Denominator for basic and diluted earnings per share: Denominator for Basic and Diluted Earnings Per Share or Hpu Share [Abstract] -- None. No documentation exists for this element. -- Add: Effect of assumed shares issued under treasury stock method or restricted stock units (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Add: Effect of joint venture shares (in shares) Incremental Common Shares Attributable to Joint Venture Shares Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of joint venture shares. Add: Effect of senior convertible unsecured notes (in shares) Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities Weighted average common shares outstanding for diluted earnings per common share (in shares) Basic earnings per common share: Income (loss) from continuing operations attributable to iStar Inc. and allocable to common shareholders (in dollars per share) Earnings per share, basic (in dollars per share) Diluted earnings per common share: Earnings Per Share, Diluted [Abstract] Income (loss) from continuing operations attributable to iStar Inc. and allocable to common shareholders (in dollars per share) Net income (loss) attributable to iStar Inc. and allocable to common shareholders (in dollars per share) Earnings allocable to HPUs: Earnings Allocable to High Performance Units [Abstract] Earnings Allocable to High Performance Units [Abstract] Numerator for basic and diluted earnings per HPU share: Numerator for Basic Earnings Per HPU Share [Abstract] Numerator for Basic Earnings Per HPU Share [Abstract] Net income (loss) attributable to iStar Inc. and allocable to HPU holders Net Income (Loss) Attributable to Parent and Available to HPU Holders Net Income (Loss) Attributable to Parent and Available to HPU Holders Denominator for basic and diluted earnings per HPU share: Denominator for Basic and Diluted Earnings Per HPU Share [Abstract] Denominator for Basic and Diluted Earnings Per HPU Share [Abstract] Weighted average HPUs outstanding for basic and diluted earnings per share (in shares) Basic and diluted earnings per HPU share: Net income (loss) attributable to iStar Inc. and allocable to HPU holders (in dollars per share) Real Estate Properties Real Estate Properties [Member] Real Estate Properties [Member] Land, at cost Land Buildings and improvements, at cost Investment Building and Building Improvements Schedule of real estate assets Schedule of Real Estate Assets [Table Text Block] Schedule of Real Estate Assets [Table Text Block] Schedule of pro forma revenues and net income Business Acquisition, Pro Forma Information [Table Text Block] Schedule of future minimum rental payments for operating leases Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Interest rate swap Interest Rate Swap One [Member] Forward based contracts first in which two parties agree to swap periodic payments that are fixed at the outset of the swap contract with variable payments based on a market interest rate (index rate) over a specified period. Secured term loan Derivative, Amount of Hedged Item Notional Amount Derivative, Notional Amount Derivative, Variable Rate Derivative, Basis Spread on Variable Rate Derivative, Fixed Rate Derivative, Fixed Interest Rate Realized loss on interest rate hedge Derivative, Net Hedge Ineffectiveness Gain (Loss) Fixed Rate Derivative, Cap Interest Rate Hedge gain to be reclassified within next 12 months Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months Quarterly Financial Information (Unaudited) Quarterly Financial Information [Text Block] Sells Indian rupee (INR)/Buys USD Forward Sells INR Buys USD Forward [Member] Sells INR Buys USD Forward [Member] Sells euro (EUR)/Buys USD Forward Sells EUR Buys USD Forward [Member] Represents the Sells EUR /Buy USD Forward Foreign currency contract member. Sells pound sterling (GBP)/Buys USD Forward Sells GBP Buys USD Forward [Member] Represents the Sells GBP/ Buy USD Forward Foreign currency contract member. Foreign currency transaction gain (loss) Foreign Currency Transaction Gain (Loss), before Tax Line of Credit Facility [Table] Line of Credit Facility [Table] 2016 Secured Term Loan 2016 Secured Term Loan [Member] 2016 Secured Term Loan [Member] Unsecured Notes 3.875 Percent Senior Notes Due July 2016 Other Expense Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Percentage of par credit facilities were issued at Line of Credit Facility Issue Price as Percentage of Principal Amount Represents the percentage of principal amount used in the computation of issue price for the line of credit facility. Minimum amortization payment Minimum amortization payment Minimum quarterly amortization payment as a percentage of the outstanding principal amount. Repayment of principal amount Lender fees Debt Instrument, Lender Fees, Amount Debt Instrument, Lender Fees, Amount Third party fees recognized Debt Instrument, Third Party Fees, Amount Recognized Debt Instrument, Third Party Fees, Amount Recognized Third party fees capitalized Debt Instrument, Third Party Fees, Amount Capitalized Debt Instrument, Third Party Fees, Amount Capitalized Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Commitment fee percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Line of credit facility, interest rate Line of Credit Facility, Interest Rate During Period Converted loan, term Converted Term Loan, Term Converted Term Loan, Term Number of tranches Number of Tranches under Term Loans Represents the number of tranches under term loans. Loss on early extinguishment of debt, net Schedule of assets and liabilities recorded at fair value on a recurring and non-recurring basis Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Summary of changes in Level 3 available-for-sale securities reported at fair value Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Investment across a range of real estate sectors over the past two decades (more than $35 billion) Real Estate Investment Real Estate Investment Unvested Time Based Units Unvested Time Based Units [Member] Unvested Time Based Units [Member] Market-based Units Performance Shares [Member] Anti-dilutive shares Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure [Text Block] Schedule of unfunded commitments Unfunded Financial Commitments [Table Text Block] Tabular disclosure of off-balance sheet unfunded financial commitments which includes performance-based commitments, discretionary funding arrangements and strategic investment commitments. Schedule of fair value of derivative financial instruments as well as their classification on Consolidated Balance Sheets Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Schedule of derivative financial instruments on Consolidated Statements of Operations Derivative Instruments, Gain (Loss) [Table Text Block] Schedule of notional amounts of outstanding derivative positions Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] Intangible assets, accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Intangible assets, net Finite-Lived Intangible Assets, Net Other receivables Other Receivables Other assets Other Assets Restricted cash Restricted Cash and Cash Equivalents Leasing costs, net Deferred Costs, Leasing, Net Corporate furniture, fixtures and equipment, net Furniture Fixtures and Leasehold Improvements, Net Net amount, at the balance sheet date, of long-lived, depreciable assets commonly used in offices that are additions or improvements to assets held under lease arrangement. Deferred expenses and other assets, net Amortization of above market lease and lease incentives Amortization of Above Market Lease and Lease Incentives Amortization of Above Market Lease and Lease Incentives Amortization of intangible assets Amortization of Intangible Assets Accumulated amortization on leasing costs Deferred Costs, Leasing, Accumulated Amortization Accumulated depreciation on corporate furniture, fixtures and equipment Accumulated Depreciation Furniture Fixtures and Leasehold Improvements The cumulative amount of depreciation, related to leasehold improvements, corporate furniture, fixtures and equipment that has been recognized in the income statement. Other Assets and Other Liabilities Other Assets and Other Liabilities Disclosure [Text Block] This element may be used as a single block of text to encapsulate the entire disclosure for other assets and other liabilities including data and tables. Impairment of real estate Impairment of Real Estate Number of properties impaired Number of Properties Impaired Number of Properties Impaired Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Not Currently Redeemable Not Currently Redeemable [Member] Not Currently Redeemable [Member] Real Estate, Type of Property [Axis] Real Estate, Type of Property [Axis] Real Estate [Domain] Real Estate [Domain] Acquisition Type [Axis] Acquisition Type [Axis] Acquisition Type [Axis] Acquisition Type [Domain] Acquisition Type [Domain] Acquisition Type [Domain] Real Estate Acquired in Satisfaction of Debt Real Estate Acquired in Satisfaction of Debt [Member] Real Estate Equity Investment Three Real Estate Equity Investment Three [Member] Real Estate Equity Investment Three [Member] Increase in ownership percentage Noncontrolling Interest, Ownership Percentage by Parent, Period Increase (Decrease) Noncontrolling Interest, Ownership Percentage by Parent, Period Increase (Decrease) Payment to redeem a noncontrolling interest Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Number of real estate properties acquired Number of Real Estate Properties Acquired Number of Real Estate Properties Acquired Fair value of assets acquired Fair Value of Assets Acquired Purchase price Purchase Price Purchase Price Deferred revenue Deferred Revenue Property contributed, aggregate carrying value Property Contributed, Aggregate, Carrying Value Property Contributed, Aggregate, Carrying Value Impairment of land and development assets Impairment of Land and Development Assets Impairment of Land and Development Assets Redeemable noncontrolling interests Redemption value Redeemable Noncontrolling Interest, Equity, Redemption Value Debt Obligations, net Debt Disclosure [Text Block] Concentration Risk [Table] Concentration Risk [Table] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] New York NEW YORK California CALIFORNIA Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Geographic Concentration Risk Geographic Concentration Risk [Member] Customer Concentration Risk Customer Concentration Risk [Member] Office/Industrial Office/Industrial [Member] Office/Industrial [Member] Commercial Entertainment and Leisure Real Estate Concentration Risk [Line Items] Concentration Risk [Line Items] Concentration risk, percentage Concentration Risk, Percentage Number of large borrowers or tenants Concentration Risk Number of Large Borrowers or Tenants Represents the number of large borrowers considered for evaluating concentration risk. Concentration risk percentage of revenue (no more than) Concentration Risk Percentage of Revenue Accounted by Large Borrowers or Tenants Concentration Risk Percentage of Revenue Accounted by Large Borrowers or Tenants Concentration risk percentage of one single customer, revenue (no more than) Concentration Risk, Percentage of Revenue Accounted by One Single Borrower or Tenant Concentration Risk, Percentage of Revenue Accounted by One Single Borrower or Tenant Net Lease Asset Number of net lease assets acquired Number of Net Lease Assets Number of Net Lease Assets Acquisitions of real estate assets Payments for land and funded tenant improvements Payments to Acquire Land Business combination, pro forma information, revenue of acquiree since acquisition date, actual Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Business combination, pro forma information, loss of acquiree since acquisition date, actual Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual Equity Stockholders' Equity Note Disclosure [Text Block] Net loss attributable to redeemable noncontrolling interest Net Income (Loss) Attributable to Redeemable Noncontrolling Interest Payments to acquire noncontrolling interest Payments to Acquire Additional Interest in Subsidiaries Schedule of Participating Mortgage Loans Schedule of Participating Mortgage Loans [Table Text Block] 2013-2014 Performance Incentive Plan 2013-2014 Performance Incentive Plan [Member] 2013-2014 Performance Incentive Plan [Member] 2015-2016 Performance Plan 2015-2016Performance Plan [Member] 2015-2016Performance Plan [Member] All Performance Incentive Plans All performance incentive plans [Member] All performance incentive plans [Member] Common stock subject to sales restriction Common Stock Subject to Sales Restriction [Member] Common Stock Subject to Sales Restriction [Member] Restricted stock units Restricted Stock Units (RSUs) [Member] Service Based Restricted Stock Units Vesting on each Anniversary Date Service Based Restricted Stock Units Vesting 20% on each Anniversary Date [Member] Service Based Restricted Stock Units Vesting 20% on each Anniversary Date [Member] Service Based Restricted Stock Units Vesting on December 31, 2018 Service Based Restricted Stock Units Vesting on December 31, 2018 [Member] Service Based Restricted Stock Units Vesting on December 31, 2018 [Member] Performance based restricted stock units vesting on December 31, 2017 Performance Based Restricted Stock Units Vesting on December 31, 2017 [Member] Performance Based Restricted Stock Units Vesting on December 31, 2017 [Member] Service based restricted stock units vesting on December 31, 2017 Service Based Restricted Stock Units Vesting on December 31, 2017 [Member] Service Based Restricted Stock Units Vesting on December 31, 2017 [Member] Service based restricted stock units with specified vesting dates Service-based Restricted Stock Units with Specified Vesting Terms [Member] Represents details pertaining to service-based restricted stock units with specified original vesting terms. Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Long-term Incentive Plan 2009 Long-term Incentive Plan 2009 [Member] Represents information pertaining to 2009 Long-Term Incentive Plan of the entity. Employees Employees [Member] Represent employees of the entity. Employees 2 Employees 2 [Member] [Member] Employees 2 [Member] [Member] Unrecognized compensation cost Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Weighted-average period to recognize the unrecognized compensation cost Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Number of points issued (in shares) Number of Points Issued Number of Points Issued Preferred return preferred return preferred return Number of shares authorized Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Shares available for issuance Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Shares issued Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period Non-vested, aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested Restricted shares awarded Restricted Stock, Shares Issued Net of Shares for Tax Withholdings Sale restriction period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Sale Restriction Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Sale Restriction Period Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] Non-vested at Beginning of Period (in shares) Granted (in shares) Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Non-vested at End of Period (in shares) Weighted Average Grant Date Fair Value Per Share Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Non-vested at Beginning of Period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Vested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Non-vested at End of Period (in dollars per share) Fair value of units vested during period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Forfeited (in shares) Share-based Compensation by Share-based Payment Award, Forfeited Share-based Compensation by Share-based Payment Award, Forfeited Granted units Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Granted, Number Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Granted, Number Shares issued (in shares) Vested Stock, Shares Issued Net of Shares for Tax Withholding Vested Stock, Shares Issued Net of Shares for Tax Withholding Vesting percentage Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vesting Percentage Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vesting Percentage Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Expected stock price volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Number of cliff installments Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vesting Installments, Number Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vesting Installments, Number