Investments, All Other Investments [Abstract] Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Equity Method Investee, Name [Axis] Equity Method Investee, Name [Axis] Equity Method Investee, Name [Domain] Equity Method Investee, Name [Domain] LNR Property LLC (LNR) LNR Property LLC [Member] Represents LNR Property LLC which is a servicer and a special servicer of commercial mortgage loans and CMBS and a diversified real estate, finance and management company. LNR and certain commercial mortgage backed securities and collateralized debt obligation trusts that are considered VIEs LNR Property Corporation and Considered Variable Interest Entity [Member] Represents LNR Property Corporation and certain commercial mortgage backed securities and collateralized debt obligation trusts that are considered VIEs. Madison Funds Madison Funds [Member] Represents information pertaining to Madison Funds. Madison International Real Estate Fund IILP Madison International Real Estate Fund IILP [Member] Represents information pertaining to Madison International Real Estate Fund II, LP. Madison International Real Estate Fund IIILP Madison International Real Estate Fund IIILP [Member] Represents information pertaining to Madison International Real Estate Fund III, LP. Madison GP1 Investors LP Madison GP1 Investors LP [Member] Represents information pertaining to Madison GP1 Investors, LP. Oak Hill Funds Oak Hill Funds [Member] Represents information pertaining to Oak Hill funds, an equity method investment of the entity. Oak Hill Funds Group 2 Oak Hill Funds Group 2 [Member] Represents information pertaining to Oak Hill group two, which includes OHA Strategic Master Fund, L.P. Real estate equity investments Real Estate Equity Investments [Member] Represents real estate investment including OREO and REHI. Other equity method investments Other Equity Method Investments [Member] Represents information pertaining to other equity method investments not listed separately. Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Variable Interest Entities of Equity Method Investment Summarized Financial Information Assets Variable Interest Entities of Equity Method Investment Summarized Financial Information Assets The amount of assets reported by variable interest entities of an equity method investment of the entity. Variable Interest Entities of Equity Method Investment Summarized Financial Information Liabilities Variable Interest Entities of Equity Method Investment Summarized Financial Information Liabilities The amount of liabilities reported by variable interest entities of an equity method investment of the entity. Equity method investments Equity Method Investments Earnings (loss) from equity method investments Income (Loss) from Equity Method Investments Other, carrying value Investments Other Represents other investments not otherwise specified in the taxonomy. Total other investments, carrying value Other Investments Percentage of ownership acquired by the Company and a group of investors Equity Method Investment Ownership Percentage Acquired by Entity and Group of Investors The percentage of ownership of common stock or equity participation in the investee acquired by the entity along with group of investors, including creditors of the investee company, accounted for under the equity method of accounting. Contribution towards principal amount of Holdco Notes Payments to Acquire Equity Method Investments, Contribution Towards Principal Amount Debt Extinguished Represents the contribution made to equity method investee towards principal amount of debt extinguished. Amount of cash contributed in exchange for equity interest Payments to Acquire Equity Method Investments Equity interest in investee Equity Method Investment, Aggregate Cost Real estate, agreement to sell investment Real Estate, Agreement to Sell Investment Real Estate, Agreement to Sell Investment Real estate, net proceeds held in escrow for potential indemnification obligations Real Estate, Net Proceeds Held in Escrow for Potential Indemnification Obligations Real Estate, Net Proceeds Held in Escrow for Potential Indemnification Obligations Income Statements Equity Method Investment, Summarized Financial Information, Income Statement [Abstract] Total revenue Equity Method Investment, Summarized Financial Information, Revenue Income tax expense Equity Method Investment, Summarized Financial Information, Income Tax Expense (Benefit) The amount of income tax expense (benefit) reported by an equity method investment of the entity. Net income (loss) attributable to LNR Equity Method Investment, Summarized Financial Information, Net Income (Loss) iStar's ownership percentage Equity Method Investment, Ownership Percentage Property sold, aggregate, carrying value Property Sold, Aggregate, Carrying Value Property Sold, Aggregate, Carrying Value Earnings from equity method investments Balance Sheets Equity Method Investment Summarized Financial Information Balance Sheet [Abstract] -- None. No documentation exists for this element. -- Total assets(2) Equity Method Investment, Summarized Financial Information, Assets Total debt(2) Equity Method Investment, Summarized Financial Information, Noncurrent Liabilities Total liabilities(2) Equity Method Investment, Summarized Financial Information, Liabilities Noncontrolling interests Equity Method Investment, Summarized Financial Information, Noncontrolling Interest LNR Property LLC equity Equity Method Investment, Summarized Financial Information, Equity or Capital iStar's equity in LNR Equity Method Investment, Amount, Quarter Lag Equity Method Investment, Amount, Quarter Lag Total assets, VIE Equity Method Investment, Summarized Financial Information, Assets, Net of VIEs Equity Method Investment, Summarized Financial Information, Assets, Net of VIEs Total debt, VIE Equity Method Investment, Summarized Financial Information, Noncurrent Liabilities, Net of VIEs Equity Method Investment, Summarized Financial Information, Noncurrent Liabilities, Net of VIEs Total liabilities, VIE Equity Method Investment, Summarized Financial Information, Liabilities, Net of VIEs Equity Method Investment, Summarized Financial Information, Liabilities, Net of VIEs Servicing fee revenue Equity Method Investment Servicing Fee Revenue The amount of servicing fee revenue reported by an equity method investment of the entity and eliminated upon consolidation. Income (loss) from equity method investments, before OTTI Income (Loss) from Equity Method Investments, Before Other than Temporary Impairment Income (Loss) from Equity Method Investments, Before Other than Temporary Impairment Income (loss) from equity method investments, release of AOCI Income (Loss) from Equity Method Investments, Release of AOCI Income (Loss) from Equity Method Investments, Release of AOCI Income (loss) from equity method investments, net of OTTI Income (Loss) from Equity Method Investments, Net of OTTI Income (Loss) from Equity Method Investments, Net of OTTI Receivables [Abstract] 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 troubled debt restructurings, presented by class Troubled Debt Restructurings on Financing Receivables [Table Text Block] 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] Loans Loans Gross [Abstract] -- None. No documentation exists for this element. -- Individually Evaluated for Impairment Financing Receivable, Individually Evaluated for Impairment Collectively Evaluated for Impairment Financing Receivable, Collectively Evaluated for Impairment Loans Acquired with Deteriorated Credit Quality Financing Receivable, Acquired with Deteriorated Credit Quality Total loans Financing Receivable, Net Less: Reserve for loan losses Loans Receivable Allowance [Abstract] -- None. No documentation exists for this element. -- Individually Evaluated for Impairment Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment Collectively Evaluated for Impairment Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment Loans Acquired with Deteriorated Credit Quality Financing Receivable, Allowance for Credit Losses, Acquired with Deteriorated Credit Quality Total reserve for loan losses 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. Total Loans Net [Abstract] -- None. No documentation exists for this element. -- Individually Evaluated for Impairment Financing Receivable Individually Evaluated for Impairment, Net of Reserve for Loan Losses The balance of financing receivables that were individually evaluated for impairment net of reserve for loan losses. Collectively Evaluated for Impairment Financing Receivable Collectively Evaluated for Impairment, Net of Reserve for Loan Losses The balance of financing receivables that were collectively evaluated for impairment net of reserve for loan losses. Loans Acquired with Deteriorated Credit Quality Financing Receivable Acquired with Deteriorated Credit Quality, Net of Reserve for Loan Losses The balance of financing receivables that were acquired with deteriorated credit quality net of reserve for loan losses. Total loans net of reserve for loan losses Financing Receivable, Net of Reserve for Loan Losses The amount of the recorded investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position, net of reserve for loan losses. Unamortized discounts, (premiums), deferred fees and costs, individually evaluated for impairment, net 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). Unamortized discounts, (premiums), deferred fees and costs, collectively evaluated for impairment, net 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). Unamortized discounts, (premiums), deferred fees and costs, loans acquired with deteriorated credit quality, net Unamortized Discount Premium Deferred Fees and Costs Loans Acquired with Deteriorated Credit Quality Represents the unamortized discounts, premiums, deferred fees and costs relating to loans acquired with deteriorated credit quality and shown as a net premium (discount). Cumulative principal balances of loans acquired with deteriorated credit quality Financing Receivable Acquired with Deteriorated Credit Quality Cumulative Principal Balance Represents the cumulative principal balance of financing receivables that were acquired with deteriorated credit quality. Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Statement, Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Strategic Venture, Commercial Operating Properties Strategic Venture, Commercial Operating Properties [Member] Strategic Venture, Commercial Operating Properties [Member] Statement [Line Items] Statement [Line Items] Net income (loss) attributable to redeemable noncontrolling interests Net Income (Loss) Attributable to Redeemable Noncontrolling Interest Operating property assets contributed by a noncontrolling partner Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value Payment to redeem noncontrolling member's interest Payments for Repurchase of Redeemable Noncontrolling Interest Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Variable Rate [Axis] Variable Rate [Axis] Information by type of variable rate. Variable Rate [Domain] Variable Rate [Domain] [Domain] for Information by type of variable rate. London Interbank Offered Rate (LIBOR) [Member] London Interbank Offered Rate (LIBOR) [Member] Interest rate at which a bank borrows funds from other banks in the London interbank market. Lender Name [Axis] Lender Name [Axis] Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Lenders from Original Credit Facility Not Participating in New Credit Facility Lenders from Original Credit Facility Not Participating in New Credit Facility [Member] Lenders from Original Credit Facility Not Participating in New Credit Facility [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] February 2013 Secured Credit Facility February 2013 Secured Credit Facility [Member] February 2013 Secured Credit Facility [Member] October 2012 Secured Credit Facility New credit facility due October 2017 [Member] Represents the New credit facility which is due October 2017. 2012 Secured Credit Facilities Secured Credit Facilities, 2012 [Member] Represents the secured credit facility of the entity entered into in 2012. Secured 2012 Tranche A-1 Facility Due 2016 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. Secured 2012 Tranche A-2 Facility Due 2017 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. Unsecured Notes LIBOR plus 0.50% senior convertible notes Unsecured Notes LIBOR Plus Point 50 Percent Senior Convertible Notes Due October 2012 [Member] Unsecured Notes LIBOR + 0.50% senior convertible notes due October 2012 debt instrument of the entity. Unsecured Line of credit due June 2012 Unsecured Credit Facility Line of Credit June 2012 [Member] Unsecured Line of credit due June 2012 debt instrument of the entity. Unsecured Notes 5.50% senior notes Unsecured Notes 5 point 50 Percent Senior Notes Due June 2012 [Member] Unsecured Notes 5.50% due June 2012 senior notes debt instrument of the entity. Secured 2011 Tranche A-2 Facility Due 2014 Secured Credit facilities Tranche A2 Facility Due June 2014 [Member] Secured Tranche A-2 Facility debt instrument of the entity, which is due in 2014. Unsecured Notes 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] Unsecured Notes 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] Unsecured Notes 8.625% senior notes Unsecured Notes 8 point 625 Percent Senior Notes Due June 2013 [Member] Unsecured Notes 8.625% due June 2013 senior notes debt instrument of the entity. Unsecured Notes 5.95% senior notes Unsecured Notes 5 point 95 Percent Senior Notes Due October 2013 [Member] Unsecured Notes 5.95% due October 2013 senior notes debt instrument of the entity. Unsecured Credit Facilities Unsecured Credit Facilities [Member] Represents the unsecured credit facility of the entity. Secured Credit Facility Secured Credit Facilities [Member] Represents the secured credit facility of the entity. Debt Instrument [Line Items] Debt Instrument [Line Items] Principal amount Debt Instrument, Face Amount Debt instrument, covenant, minimum collateral coverage, one Debt Instrument, Covenant, Minimum Collateral Coverage, One Debt Instrument, Covenant, Minimum Collateral Coverage, One Debt instrument, covenant, minimum collateral coverage, two Debt Instrument, Covenant, Minimum Collateral Coverage, Two Debt Instrument, Covenant, Minimum Collateral Coverage, Two Debt instrument, collateral, percent of proceeds from principal repayments and sales applied to repayment, one Debt Instrument, Collateral, Percent of Proceeds from Principal Repayments and Sales Applied to Repayment, One Debt Instrument, Collateral, Percent of Proceeds from Principal Repayments and Sales Applied to Repayment, One Debt instrument, collateral, percent of proceeds from principal repayments and sales applied to repayment, two Debt Instrument, Collateral, Percent of Proceeds from Principal Repayments and Sales Applied to Repayment, Two Debt Instrument, Collateral, Percent of Proceeds from Principal Repayments and Sales Applied to Repayment, Two Debt instrument, covenant, minimum collateral coverage, three Debt Instrument, Covenant, Minimum Collateral Coverage, Three Debt Instrument, Covenant, Minimum Collateral Coverage, Three Debt instrument, lender fees Debt Instrument, Lender Fees, Amount Debt Instrument, Lender Fees, Amount Debt instrument, capitalized lender fees Debt Instrument, Capitalized Lender Fees Debt Instrument, capitalized Lender Fees Debt instrument, lender fees, amount recorded in gain (loss) on early extinguishment of debt Debt Instrument, Lender Fees, Amount Recorded as a Loss on Early Extinguishment of Debt Debt Instrument, Lender Fees, Amount Recorded as a Loss on Early Extinguishment of Debt Debt instrument, third party fees Debt Instrument, Third Party Fees Debt Instrument, Third Party Fees Debt instrument, third party fees, amount recognized Debt Instrument, Third Party Fees, Amount Recognized Debt Instrument, Third Party Fees, Amount Recognized Debt instrument, third party fees, amount capitalized Debt Instrument, Third Party Fees, Amount Capitalized Debt Instrument, Third Party Fees, Amount Capitalized Percentage of REIT taxable income permitted for distribution under debt covenants 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. Debt instrument, amount of real estate assets or interests available to distribute Debt Instrument, Maximum Amount of Real Estate Asset Distributions to Stockholders Debt Instrument, Maximum Amount of Real Estate Asset Distributions to Stockholders Repayments under secured credit facilities Repayments under Credit Facilities The cash outflow to pay off obligations under credit facilities with either short term or long term maturity that is collateralized (backed by pledge, mortgage or other lien in the entity's assets). Debt instrument, unamortized discounts and financing fees Debt Instrument, Unamortized Discounts and Financing Fees Debt Instrument, Unamortized Discounts and Financing Fees Borrowings on debt instrument Debt Instrument, Increase, Additional Borrowings Number of tranches Number of Tranches under Term Loans Represents the number of tranches under term loans. 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. Variable interest rate, spread Debt Instrument, Basis Spread on Variable Rate Repayment of principal amount Debt Instrument, Decrease, Repayments Effective interest rate (as a percent) Debt Instrument, Interest Rate at Period End Minimum aggregate cumulative amortization payment Debt Instrument, Minimum Aggregate Cumulative Amortization Payment Represents the minimum aggregate cumulative amortization payment. Gain (loss) on early extinguishment of debt, net Gains (Losses) on Extinguishment of Debt Periods following the initial payment of amortization that additional amortization payments are due Debt Instrument, Amortization Payment Periods after Initial Payment Represents the periods that amortization payments are due following the initial payment. Stated interest rate (as a percent) Debt Instrument, Interest Rate, Stated Percentage Extinguishment of debt, amount Extinguishment of Debt, Amount 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. Aggregate equity value permitted to be distributed Debt Instrument, Covenant, Aggregate Equity Value Permitted to be Distributed Debt Instrument, Covenant, Aggregate Equity Value Permitted to be Distributed Earnings Per Share [Abstract] Reconciliation of income (loss) from continuing operations used in the basic and diluted EPS calculations Reconciliation of Income (Loss) from Continuing Operations [Abstract] -- None. No documentation exists for this element. -- Income (loss) from continuing 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 Income from sales of residential property Residential Property Profit (Loss) The gain resulting from the sale or other disposition of residential properties or components of those assets during the period. Preferred dividends Preferred Stock Dividends, Income Statement Impact Income (loss) from continuing operations attributable to iStar Financial Inc. and allocable to common shareholders, HPU holders and Participating Security Holders 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. 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] Common shares Common Stock [Member] HPU's HPU [Member] This element represents HPU's (High Performance Units). Class of Stock [Line Items] Class of Stock [Line Items] Numerator for basic and diluted earnings per share: Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Income (loss) from continuing operations attributable to iStar Financial 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. Income (loss) from continuing operations attributable to iStar Financial Inc. and allocable to HPU holders Income (Loss) from Continuing Operations, Attributable to Parent and Available to HPU Holders The income or loss from continuing operations during the period which is attributable to the parent and is available to HPU holders. Income (loss) from discontinued operations Income (Loss) from Discontinued Operations This element represents the overall income (loss) from a disposal group that is classified as a component of the entity, net of income tax, reported as a separate component of income before extraordinary items and the cumulative effect of accounting changes before deduction or consideration of the amount which may be allocable to noncontrolling interests, if any. Gain from discontinued operations Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax Net income (loss) attributable to iStar Financial Inc. and allocable to common shareholders Net Income (Loss) Available to Common Stockholders, Basic and Diluted Net Income (Loss) Available to Common Stockholders, Basic and Diluted Net income (loss) attributable to iStar Financial Inc. and allocable to HPU holders 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. 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. -- Weighted average common shares outstanding for basic earnings per common share Weighted Average Number of Shares Outstanding, Basic Weighted average High Performance Units outstanding for basic and diluted earnings per share 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. Basic and diluted earnings per common share: Earnings Per Share, Basic and Diluted [Abstract] Income (loss) from continuing operations attributable to iStar Financial Inc. and allocable to common shareholders (in dollars per share) Income (Loss) from Continuing Operations, Per Basic and Diluted Share Income (loss) from discontinued operations (in dollars per share) Income (Loss) from Discontinued Operations, Net of Tax, Per Basic and Diluted Share Gain from discontinued operations (in dollars per share) Discontinued Operation Gain (Loss) on Disposal of Discontinued Operation Net of Tax Per Basic and Diluted Share Discontinued Operation Gain (Loss) on Disposal of Discontinued Operation Net of Tax Per Basic and Diluted Share Net income (loss) attributable to iStar Financial Inc. and allocable to common shareholders (in dollars per share) Earnings Per Share, Basic and Diluted Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative [Table] Derivative [Table] Derivative, by Nature [Axis] Derivative, by Nature [Axis] Derivative, Name [Domain] Derivative, Name [Domain] Cash flow interest rate cap Interest Rate Cap [Member] 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. Interest rate cap and interest rate swap Interest Rate Cap and Interest Rate Swap [Member] Interest Rate Cap and Interest Rate Swap [Member] Terminated interest rate swap Terminated Interest Rate Swap [Member] Terminated Interest Rate Swap [Member] Foreign currency derivatives Forward Contracts [Member] Derivative [Line Items] Derivative [Line Items] Notional Amount Notional Amount of Interest Rate Derivatives Variable Rate Derivative, Basis Spread on Variable Rate Interest Rate Cap, Fixed Rate Derivative, Cap Interest Rate Interest Rate Swap, Fixed Rate Derivative, Fixed Interest Rate Expense (income) related to qualifying cash flow hedges expected to be reclassified to earnings over the next 12 months Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months Foreign currency derivative collateral included in restricted cash Collateral Already Posted, Derivatives, Aggregate Fair Value The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments. Commitments and Contingencies Disclosure [Abstract] 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 Loans Receivable [Member] Real Estate Net Lease, Assets [Member] Represents the funding of build-outs of space in net lease assets by the entity. Strategic Investments Strategic Investments [Member] Represents the investment of capital in several real estate funds and other ventures by the entity. 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. Discretionary Fundings Discretionary Fundings Represents the off-balance sheet maximum amount of potential additional fundings which the entity will make available to a borrower or tenant for an expansion or addition to a project if it approves of the expansion or addition at its sole discretion. Strategic Investments Other Commitments Represents the off-balance sheet maximum other commitments of the entity. Total unfunded commitments Unfunded Commitments Represents certain off-balance sheet unfunded commitments of the entity. Real Estate [Abstract] Schedule of Real Estate Assets Schedule of Real Estate Assets [Table Text Block] Schedule of Real Estate Assets [Table Text Block] Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block] Business and Organization [Abstract] -- None. No documentation exists for this element. -- Investment across a range of real estate sectors over the past two decades (more than $35 billion at December 31, 2012) Real Estate Investment Represents the amount invested across a range of real estate sectors by the entity over a period of time. Period over which the entity has made the investment across a range of real estate (in decades) Real Estate, Investment Period Represents the period over which the entity has invested across a range of real estate sectors. 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 Current Reporting Status Entity Current Reporting Status 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 Customer reimbursements Tenant Reimbursements Other Assets and Other Liabilities [Abstract] -- None. No documentation exists for this element. -- 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. Equity [Abstract] Stock Repurchase Program Stock Repurchase Program [Abstract] -- None. No documentation exists for this element. -- Repurchase of common stock, authorized amount Stock Repurchase Program, Authorized Amount Available repurchase of common stock, authorized amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Stock repurchased during period Stock Repurchased During Period, Value Income Statement [Abstract] Income (loss) from continuing operations attributable to iStar Financial Inc. Income (Loss) from Continuing Operations Attributable to Parent 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 deferred tax assets and liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Other Investments Other Investments [Text Block] This element represents the disclosures for equity method investments, cost method investments, and marketable securities. 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. Schedule of Financing Receivables Past Due [Table] Schedule of Financing Receivables Past Due [Table] Accounts, Notes, Loans and Financing Receivable by Receivable Type [Axis] Receivable Type [Axis] Receivable Type [Domain] Receivable Type [Domain] Senior mortgages First Mortgage [Member] Subordinate mortgages Second Mortgage [Member] Corporate/Partnership loans Corporate Debt Securities [Member] 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 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] Residential Operating Properties Residential Operating Properties [Member] Residential Operating Properties [Member] Commercial Operating Properties Commercial Operating Properties [Member] Commercial Operating Properties [Member] Land Land [Member] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Corporate Joint Venture Corporate Joint Venture [Member] Real Estate Properties [Line Items] Real Estate Properties [Line Items] iStar's ownership percentage, consolidated Noncontrolling Interest, Ownership Percentage by Parent Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners Fair value of assets acquired Fair Value of Assets Acquired Equity Stockholders' Equity Note Disclosure [Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangement by Title of Individual [Axis] Schedule of Share-based Compensation Arrangement by Title of Individual [Axis] Reflects the pertinent provisions pertaining to equity-based compensation arrangement, by individual. Schedule of Share-based Compensation Arrangement by Title of Individual with Relationship to Entity [Domain] Schedule of Share-based Compensation Arrangement by Title of Individual with Relationship to Entity [Domain] Title of the individual (or the nature of the entity's relationship with the individual) who is party to the equity-based compensation arrangement. Company's chairman and chief executive officer Board of Directors Chairman and Chief Executive Officer [Member] Chairman is the leader of the entity's board of directors who presides over board meetings and other board activities and the chief executive officer is the highest ranking executive officer, who has ultimate managerial responsibility for the entity and who reports to the board of directors. Executives and other officers Executive and Other Officer [Member] Executives of the entity that are appointed to the position by the board of directors. Employees Employees [Member] Represent employees of the entity. Former director Former Director [Member] Former Director [Member] Directors Director [Member] Award Type [Axis] Award Type [Axis] Award Type [Domain] Award Type [Domain] Restricted stock units Restricted Stock Units (RSUs) [Member] Amended restricted stock units that vested on January 1, 2013 Restricted Stock Units Amended Units Vesting on January 1, 2013 [Member] Represents details pertaining to Restricted stock units amended units that vested on January 1, 2012. Service-based restricted stock units vesting on February 11, 2013 Service-based Restricted Stock Units Vesting on February 11, 2013 [Member] Service-based Restricted Stock Units Vesting on February 11, 2013 [Member] Annual incentive restricted stock units granted and vested to employees in February 2013 Annual Incentive Restricted Stock Units [Member] Annual Incentive Restricted Stock Units [Member] Performance-based restricted stock units Performance Based Restricted Stock Units [Member] Represents details pertaining to performance-based restricted stock units. Performance based restricted stock units vesting on December 31, 2013 Performance Based Restricted Stock Units Vesting on December 31, 2013 [Member] Performance Based Restricted Stock Units Vesting on December 31, 2013 [Member] Performance based restricted stock units vesting on December 31, 2014 Performance Based Restricted Stock Units Vesting on December 31, 2014 [Member] Performance Based Restricted Stock Units Vesting on December 31, 2014 [Member] Service-based restricted stock units Service Based Restricted Stock Units [Member] Represents details pertaining to service-based restricted stock units. Market-condition based restricted stock units granted on December 19, 2008, modified and measured on July 1, 2011 Market Condition-based Restricted Stock Units Granted on December 19, 2008 [Member] Represents details pertaining to market-condition based restricted stock units granted on December 19, 2008. 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. CSE and restricted stock units 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] Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Amount RSU's issued net of statuatory minimum required tax witholdings (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Units Issued Net of Statuatory Minimum Required Tax Witholdings Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Units Issued Net of Statuatory Minimum Required Tax Witholdings Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vesting term Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Performance measurement period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Performance Measurement Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Performance Measurement Period 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 Shares outstanding (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Percentage of original units granted equal to amended units Share based Compensation Arrangement by Share based Payment Award Amended Units Equal to Percentage of the Original Units Granted Represents the percentage applied to original units granted to determine the amended units in the situation where the minimum stock price, as defined in the plan, is not achieved by a certain date. Granted, fair value per share (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 Shares issued for settlement (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Shares Issued for Settlement The number of shares issued during the period to settle grants made on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). 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. Gross contributions made by the Company Defined Contribution Plan, Cost Recognized 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] 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 Loans modified through troubled debt restructurings Financing Receivable, Modifications, Recorded Investment 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. Lease Asset Sale Type [Axis] Lease Asset Sale Type [Axis] Lease Asset Sale Type [Axis] Lease Asset Sale Type [Domain] Lease Asset Sale Type [Domain] [Domain] for Lease Asset Sale Type [Axis] Portfolio Lease Asset Sale Portfolio Lease Asset Sale [Member] Portfolio Lease Asset Sale [Member] Residential Operating Properties Net Lease Net Lease Asset [Member] Represents details pertaining to net lease assets. 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. Number of properties transferred from held for sale to held for use Number of Properties Transferred from Held for Sale to Held for Use Number of Properties Transferred from Held for Sale to Held for Use Property transferred from HFS, aggregate, carrying value Property Transferred from HFS, Aggregate, Carrying Value Property Transferred from HFS, Aggregate, Carrying Value Number of real estate properties transferred to held-for-sale Number of Real Estate Properties Transferred to Held for Sale Number of Real Estate Properties Transferred to Held for Sale 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 Gain (loss) on real estate held for sale Gain (Loss) on Real Estate Held for Sale Gain (Loss) on Real Estate Held for Sale Secured Term Loans Collateralized by net lease assets due through 2026 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. Unsecured Notes 5.70% senior notes Unsecured Notes 5 Point 70 Percent Senior Notes Due March 2014 [Member] Unsecured Notes 5.70% due March 2014 senior notes debt instrument of the entity. Unsecured Notes 6.05% senior notes Unsecured Notes 6 point 05 Percent Senior Notes Due April 2015 [Member] Unsecured Notes 6.05% due April 2015 senior notes debt instrument of the entity. Unsecured Notes 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. Senior Convertible 3.0% notes Senior Convertible Three Point Zero Percent Notes Due November 2016 [Member] Senior Convertible Three Point Zero Percent Notes Due November 2016 [Member] Unsecured Notes 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. Unsecured Notes 9.0% senior notes Unsecured Notes Nine Percent Senior Notes Due June 2017 [Member] Unsecured Notes Nine Percent Senior Notes Due June 2017 [Member] Unsecured Notes 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] Unsecured Notes Unsecured Senior Notes [Member] Represents the unsecured senior notes of the entity. Other debt obligations due in October, 2035 Other Debt Securities, Due October 2035 [Member] Represents other debt obligations due in October, 2035. Total debt obligations Long-term Debt, Gross Debt discounts, net Debt Instrument, Unamortized Discount (Premium), Net Total long-term debt obligations, net Long-term Debt Stated interest rate, minimum (as a percent) Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum Stated interest rate, maximum (as a percent) Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum Convertible debt conversion ratio Debt Instrument, Convertible, Conversion Ratio 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. Impairment of assets held for use and sale carve-outs Impairment of Long-Lived Assets Held-for-use and Sale Carve Out Impairment of Long-Lived Assets Held-for-use and Sale Carve Out Impairment of long-lived assets sale carve out Impairment of Long-Lived Assets Sale Carve Out Impairment of Long-Lived Assets Sale Carve Out Accounting Policies [Abstract] New Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] 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). Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Financing Receivable Information by Credit Quality Indicator [Axis] Credit Quality Indicator [Axis] Financing Receivable, by Credit Quality Indicator [Domain] Financing Receivable, by Credit Quality Indicator [Domain] Real Estate Finance Performing Financing Receivable [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 Weighted Average Risk Ratings Weighted Average Risk Ratings Represents the weighted average risk rating of the instrument. Fair Value Disclosures [Abstract] Schedule of assets and liabilities recorded at fair value on a recurring and non-recurring basis by levels Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Schedule of Cumulative Redeemable Preferred Stock outstanding by series 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] Unamortized finite lived intangible assets Finite-Lived Intangible Assets, Net Finite-lived intangible assets, accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Amortization expense related to real estate intangibles Amortization of Intangible Assets Stock-Based Compensation Plans and Employee Benefits Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Business and Organization Business and Organization [Text Block] This element represents nature of an entity's business, the major products or services it sells or provides and its principal markets. It also discloses background of the entity. Organization, Consolidation and Presentation of Financial Statements [Abstract] Basis of Presentation and Principles of Consolidation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Revenues Disposal Group, Including Discontinued Operation, Revenue Total expenses Disposal Group, Including Discontinued Operation, Total Expenses Disposal Group, Including Discontinued Operation, Total Expenses Impairment of assets Disposal Group, Including Discontinued Operation, Impairment Charges Disposal Group, Including Discontinued Operation, Impairment Charges Income (loss) from discontinued operations Fair Values Fair Value Disclosures [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. Statement of Other Comprehensive Income [Abstract] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Other income [Member] Other Income [Member] Earnings from equity method investments [Member] Income (Loss) from Equity Method Investments [Member] Reclassification of (gains)/losses on available-for-sale securities Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax Sells INR/Buys USD Forward Sells INR Buys USD Forward [Member] Sells INR Buys USD Forward [Member] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Designated as Hedging Instrument Designated as Hedging Instrument [Member] Derivative Instrument Risk [Axis] Derivative Instrument Risk [Axis] Derivative Contract Type [Domain] Derivative Contract Type [Domain] Foreign exchange contracts Foreign Exchange Contract [Member] Other Expense Other Expense [Member] Notional Amount Notional Amount of Foreign Currency Derivatives 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 Schedule of Financing Receivable, Troubled Debt Restructurings [Table] Schedule of Financing Receivable, Troubled Debt Restructurings [Table] 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] Three Month Payment Extension Three Month Payment Extension [Member] Three Month Payment Extension [Member] One Year Payment Extension One Year Payment Extension [Member] One Year Payment Extension [Member] Financing Receivable, Troubled Debt Restructurings [Axis] Financing Receivable, Troubled Debt Restructuring [Axis] Financing Receivable, Troubled Debt Restructurings [Domain] Financing Receivable, Troubled Debt Restructuring [Domain] Nonperforming financing receivable Nonperforming Financing Receivable [Member] Non-performing senior mortgages 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. Repayment of debt Repayment of Debt [Member] Non-performing first mortgage with recorded chargeoffs and rate reductions Non-Performing First Mortgage with Recorded Chargeoffs and Rate Reductions [Member] Non-Performing First Mortgage with Recorded Chargeoffs and Rate Reductions Performing senior mortgages Performing First Mortgage [Member] Represents the performing loans secured by real property that have a first (highest) lien on such property in the event of default by the borrower. Senior mortgage troubled debt restructurings subsequently defaulted Senior Mortgage Troubled Debt Restructurings Subsequently Defaulted [Member] Represents senior mortgages under troubled debt restructurings that subsequently defaulted during the period. Troubled debt restructurings Financing Receivable, Modifications [Line Items] Interest income Impaired Financing Receivable, Interest Income, Cash Basis Method Number of Loans Finance Receivable, Troubled Loans The number of financing receivables that have been modified by troubled debt restructurings. 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. Post-Modification Outstanding Recorded Investment Financing Receivable, Post Modification Recorded Investment The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings after the financing receivable has been modified. Outstanding Recorded Investment Financing Recivable, Outstanding Recorded Investment The amount of the outstanding recorded investment related to 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. Maturity extension Finance Receivable, Trouble Debt Restructuring Time Period Represents the weighted average maturity period of loans. Pre-modification recorded investment Financing Receivable, Modifications, Pre-Modification Recorded Investment Financing receivable modifications recorded investment of contracts whose maturity extended and reduced principal Financing Receivable Modifications Recorded Investment of Contracts Whose Maturity Extended and Reduced Principal Recorded investment of financing Receivable whose maturity was extended and principal was reduced Financing receivable modification charge offs Financing Receivable Modification Chargeoffs Chargeoffs taken on financing receivables modified during the period Unfunded commitments 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. Risk Management and Derivatives Derivative Instruments and Hedging Activities Disclosure [Text Block] Schedule of other investments and its proportionate share of results for equity method investments Schedule of Equity Method Investments [Table Text Block] Schedule of summarized Income Statements Schedule of Equity Method Investment, Summarized Income Statements [Table Text Block] Tabular disclosure of latest available summarized Income Statements of equity method investee. Schedule of summarized Balance Sheets Schedule of Equity Method Investment Summarized Balance Sheets [Table Text Block] Tabular disclosure of latest available summarized Balance Sheets of equity method investee. Schedule of equity method investment, carrying value rollforward Schedule of Equity Method Investment, Carrying Value Rollforward [Table Text Block] Schedule of Equity Method Investment, Carrying Value Rollforward Statement of Financial Position [Abstract] Preferred Stock Series D, E, F, G and I Series D, E, F, G and I Preferred Stock [Member] Series D, E, F, G and I Preferred Stock [Member] Preferred Stock Series J Series J Preferred Stock [Member] Series J Preferred Stock [Member] Preferred Stock Series, liquidation preference per share (in dollars per share) Preferred Stock, Liquidation Preference Per Share Common Stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common Stock, shares authorized Common Stock, Shares Authorized Common Stock, shares issued Common Stock, Shares, Issued Common Stock, shares outstanding Common Stock, Shares, Outstanding Treasury stock, par value (in dollars per share) Treasury Stock Par Value Per Share Face amount or stated value of common shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. Treasury stock, shares Treasury Stock, Shares Accumulated other comprehensive income (loss) reflected in the Company's shareholders' equity Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Unrealized gains on available-for-sale securities Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Unrealized gains on cash flow hedges Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax Unrealized losses on cumulative translation adjustment Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Interest Expense Interest Expense [Member] Cash flow interest rate swap Interest Rate Swap [Member] Derivative financial instruments on consolidated statements of operations Derivative Instruments, Gain (Loss) [Line Items] 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 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] Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Statement, Business Segments [Axis] Business Segments [Axis] Segment [Domain] Segment [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 Operating Property [Member] Operating Property [Member] Corporate/ Other Corporate and Other [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 Total revenues Revenues Net operating income from discontinued operations(2) Net Operating Income From Discontinued Operations This element represents the total revenue and real estate expense from a disposal group or asset held for sale that is reported as a separate component of income, in discontinued operations. 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. Other expense Other Expenses Direct expenses Direct Operating Costs Direct segment profit (loss) Direct Segment Profit (Loss) Represents the amount of direct profit or loss during the period recognized by the reportable segment. Allocated interest expense(2) Interest Expense Including Discontinued Operations The cost of borrowed funds accounted for as interest that was charged against earnings during the period including amounts presented in discontinued operations. Allocated general and administrative(3) 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)(4) Segment Profit (Loss) Amount of profit or loss during the period recognized by the reportable segment. Provision for (recovery of) loan losses Provision for Loan Losses Expensed Impairment of assets(2) Asset Impairment Charges Including Discontinued Operations The charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value including amounts presented in discontinued operations. Depreciation and amortization(2) Depreciation and Amortization Including Discontinued Operations The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production including amounts presented in discontinued operations. 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, 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 Real Estate Investment Property, Held for Use, Net Real Estate Investment Property, Held for Use, Net Total real estate Real Estate Investment Property, 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 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 Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Sells EUR/Buys USD Forward Sells EUR Buys USD Forward [Member] Represents the Sells EUR /Buy USD Forward Foreign currency contract member. Sells GBP/Buys USD Forward Sells GBP Buys USD Forward [Member] Represents the Sells GBP/ Buy USD Forward Foreign currency contract member. Sells CAD/Buys USD Forward Sells CAD Buys USD Forward [Member] Represents the Sells CAD Buy USD Forward Foreign currency contract member. Derivative instruments, gain (loss) recognized in income, net Derivative Instruments, Gain (Loss) Recognized in Income, Net Gain (loss) on foreign investments Foreign Currency Transaction Gain (Loss), before Tax Operating Properties Operating Properties [Member] Operating Properties [Member] Land Assets Land Assets [Member] Land Assets [Member] Equity method investment, carryover basis Equity Method Investment, Carryover Basis Equity Method Investment, Carryover Basis Operating Properties Land and land improvements Land Buildings and improvements Investment Building and Building Improvements Less: accumulated depreciation and amortization Real Estate Investment Property, Accumulated Depreciation and Amortization Real Estate Investment Property, Accumulated Depreciation and Amortization Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Valuation Technique [Axis] Valuation Technique [Axis] Valuation Technique [Domain] Valuation Technique [Domain] Discounted Cash Flow Valuation Technique Discounted Cash Flow Valuation Technique [Member] Discounted cash flow valuation technique used to measure fair value. Fair Value by 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] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value, Measurements, Fair Value Hierarchy [Domain] Total Estimate of Fair Value, Fair Value Disclosure [Member] 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] Assets and liabilities recorded at fair value Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Derivative assets Assets, Fair Value Disclosure Derivative liabilities Derivative Financial Instruments, Liabilities, Fair Value Disclosure 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. Discount rate Fair Value Inputs, Discount Rate Average annual market rate growth Fair Value Inputs, Long-term Revenue Growth Rate Debt Obligations, net Debt Disclosure [Text Block] ASSETS Assets [Abstract] Real estate, at cost Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Restricted cash Restricted 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 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 Accounts Payable and Accrued Liabilities Debt obligations, net Total liabilities Liabilities Commitments and contingencies Commitments and Contingencies Redeemable noncontrolling interests Redeemable Noncontrolling Interest, Equity, Carrying Amount Equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] iStar Financial Inc. shareholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred Stock Preferred Stock, Value, Issued High Performance Units High Performance Units This element represents equity based compensation which qualifies as a second class of stock. Common Stock, $0.001 par value, 200,000 shares authorized, 144,319 issued and 85,402 outstanding at September 30, 2013 and 142,699 issued and 83,782 outstanding at December 31, 2012 Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Retained earnings (deficit) Retained Earnings (Accumulated Deficit) Accumulated other comprehensive income (loss) (see Note 11) Treasury stock, at cost, $0.001 par value, 58,917 shares at September 30, 2013 and December 31, 2012 Treasury Stock, Value Total iStar Financial Inc. shareholders' equity Stockholders' Equity Attributable to Parent Noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest Total equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total liabilities and equity Liabilities and Equity Segment Reporting Segment Reporting Disclosure [Text Block] Unsecured Debt Unsecured Debt [Member] Secured Debt Secured Debt [Member] Debt Instrument [Line Items] Aggregate amounts of principal maturities of long-term debt Long-term Debt, Fiscal Year Maturity [Abstract] 2013 (remaining three months) Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year 2014 Long-term Debt, Maturities, Repayments of Principal in Year Two 2015 Long-term Debt, Maturities, Repayments of Principal in Year Three 2016 Long-term Debt, Maturities, Repayments of Principal in Year Four 2017 Long-term Debt, Maturities, Repayments of Principal in Year Five Thereafter Long-term Debt, Maturities, Repayments of Principal after Year Five Total principal maturities Debt and Capital Lease Obligations Unamortized debt discounts, net 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 Entity [Line Items] Variable Interest Entity [Line Items] Total revenues and total expenses related to consolidated VIEs Variable Interest Entity, Measure of Activity [Abstract] Number of variable interest entities (in investments) Variable Interest Entity Number Represents the number of variable interest entities of the entity. Carrying amount, assets Variable Interest Entity, Consolidated, Carrying Amount, Assets 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. Income Taxes [Table] Income Taxes [Table] Income Taxes [Table] Taxable REIT Subsidiaries (TRS) 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. Income Taxes [Line Items] Income Taxes [Line Items] -- None. No documentation exists for this element. -- Deferred tax assets(1) Deferred Tax Assets, Gross Valuation allowance Deferred Tax Assets, Valuation Allowance Net deferred tax assets (liabilities) Deferred Tax Assets, Net of Valuation Allowance 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. Operating loss carryforwards Operating Loss Carryforwards Investment basis differences Investment Basis Differences The difference in the tax basis and carrying amounts of real estate assets of investments, before tax effects. Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest 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(1) Reclassification of (gains)/losses on cash flow hedges into earnings upon realization(2) Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax Reclassification of (gains)/losses on cumulative translation adjustment into earnings upon realization(3) Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment 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) Other Comprehensive Income (Loss), Net of Tax Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive income (loss) attributable to iStar Financial Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities Excluded from Computation of Earnings Per Share, by Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] 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. 3% Senior convertible 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] Anti-dilutive shares Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] 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 Schedule of Held-to-maturity Securities [Table] Schedule of Held-to-maturity Securities [Table] Debt Security [Axis] Debt Security [Axis] Major Types of Debt Securities [Domain] Major Types of Debt Securities [Domain] Corporate Debt Securities Schedule of Held-to-maturity Securities [Line Items] Schedule of Held-to-maturity Securities [Line Items] Held-to-maturity securities, term Held-to-maturity Securities, Term Held-to-maturity Securities, Term Held-to-maturity securities, number of term extensions Held-to-maturity Securities, Number of Term Extensions Held-to-maturity Securities, Number of Term Extensions Held-to-maturity securities, term extension Held-to-maturity Securities, Term Extension Held-to-maturity Securities, Term Extension Held-to-maturity securities Held-to-maturity Securities Unfunded commitments Allowance for doubtful accounts related to real estate tenant receivables Allowance for Doubtful Accounts Related to Tenant Receivables Represents the allowance for doubtful accounts related to tenant receivables, including deferred operating lease income receivable. Statement of Cash Flows [Abstract] 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 The cash flow impact of charges against earnings resulting from the write down of assets due to the difference between the carrying value and lower fair value. 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 Amortization of Financing Costs and Discounts Amortization of discounts/premiums and deferred interest on loans 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. Earnings from equity method investments Distributions from operations of equity method investments Proceeds from Equity Method Investment, Dividends or Distributions Deferred operating lease income Straight Line Rent Income from sales of residential property Gain from discontinued operations (Gain) 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. Repayments and repurchases of debt - debt discount and prepayment penalty 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 Increase (Decrease) in Accounts Payable and Accrued Liabilities Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Investment originations and fundings Payments to Acquire Notes Receivable Capital expenditures on real estate assets Payments for Capital Expenditures on Real Estate Assets This element represents cash outflow for capital expenditures on net lease assets. Contributions to unconsolidated entities Payments for Contributions to Unconsolidated Entities This element represents payments for contributions to unconsolidated entities. Repayments of and principal collections on loans Proceeds from Principal Repayments on Portfolio of Assets Proceeds from Principal Repayments on Portfolio of Assets Net proceeds from sales of loans Proceeds from Sale of Loans Held-for-investment Net proceeds from sales of real estate Proceeds from Sale of Real Estate Held-for-investment Net proceeds from sale of other investments Proceeds from Sale of Equity Method Investments Distributions from other investments Proceeds from Distributions from Unconsolidated Entities This element represents the amount of capital distributions received from unconsolidated subsidiaries. These investments are accounted for under the equity method of accounting. 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 from 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 under secured credit facilities Borrowings under Credit Facilities The cash inflow from credit facilities with either short term or long term maturity that is collateralized (backed by pledge, mortgage or other lien in the entity's assets). Repayments under secured credit facilities Repayments under unsecured credit facilities Repayments of Lines of Credit Unsecured The cash outflow to pay off an unsecured obligation from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with either short term or long term maturity. Borrowings under secured term loans Proceeds from Issuance of Secured Debt Repayments under secured term loans Repayments of Secured Debt Instruments The cash outflow to repay debt that is wholly or partially secured by collateral. Includes both short and long term debt instruments. Borrowings under unsecured notes Borrowings Under Unsecured Debt Instruments The cash inflow from debt that is not secured by collateral. Includes both short and long term debt instruments. Repayments under unsecured notes Repayments of Unsecured Debt Instruments The cash outflow to repay debt that is not secured by collateral. Includes both short and long term debt instruments. Repurchases and redemptions of unsecured notes Repurchase and Redemption of Secured and Unsecured Notes The cash outflow for the repurchase and redemption of secured and unsecured debt obligations prior to their maturity. Payments for deferred financing costs Payments of Financing Costs Preferred dividends paid Payments of Ordinary Dividends, Preferred Stock and Preference Stock Proceeds from issuance of preferred stock Proceeds from Issuance or Sale of Equity Other financing activities, net Proceeds from (Payments for) Other Financing Activities Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities 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 end of period Earnings Per Share Earnings Per Share [Text Block] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Long-term Incentive Plan 2006 and 2009 Long-term Incentive Plan 2006 and 2009 [Member] Represents information pertaining to 2006 and 2009 Long-term Incentive Plan of the entity. Unrecognized compensation cost Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized Weighted-average period to recognize the unrecognized compensation cost Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition Shares available for issuance Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Accounts, Notes, Loans and Financing Receivable [Line Items] Loans and other lending investments Loans and Other Lending Investments [Abstract] 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 Loans Receivable, Net Other lending investments—securities Other Lending Investments, Securities Other Lending Investments, Securities Total loans receivable, net Accrued interest Interest Receivable Fundings under existing loan commitments Payments for Funding under Existing Loan Commitments This element represents cash outflow for funding under existing loan commitments. Amount received from principal repayments Proceeds from Principal Repayments on Loans Held-for-Investment The cash inflow from repayments of the balance excluding interest (principal) on loans receivable held for investment purposes. 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) Allowance for Loan Losses [Roll Forward] Allowance for Loan Losses [Roll Forward] Reserve for loan losses at beginning of period Charge-offs 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. Reserve for loan losses at end of period Recovery of fully reserved loan Allowance for Loan and Lease Losses, Recoveries of Bad Debts Real estate, net (Encumbered Assets) Encumbered Property Subject to or Available for Operating Lease, Net Represents the property subject to or available for operating leases which is owned by one party but subject to legal claims by another party. Real estate available and held for sale (Encumbered Assets) Encumered Real Estate Available and Held for Sale Represents the REHI or OREO assets which is owned by one party but subject to legal claims by another party. Loans receivable, net (Encumbered Assets) Loans and Other Lending Encumbered Investments Represents the amount of loans and other lending investments which are owned by one party but subject to legal claims by another party. Other investments (Encumbered Assets) Encumbered other investments Represents the amount of other investments owned by one party but subject to legal claims by another party. Cash and other assets (Encumbered Assets) Cash and other assets pledged as collateral Represents the amount of cash and other assets owned by one party but subject to legal claims by another party. Total (Encumbered Assets) Encumbered Assets Carrying Value Represents the carrying amount of assets owned by one party but subject to legal claims by another party. Real estate, net (Unencumbered Assets) Unencumbered property subject to or available for operating lease net Represents the property subject to or available for operating leases that do not have any legal claim against it. Real estate available and held for sale (Unencumbered Assets) Unencumbered Real Estate Available and Held for Sale Represents the amount of REHI or OREO assets that do not have any legal claim against it. Loans receivable, net (Unencumbered Assets) Loans and Other Lending Investments Unencumbered Assets Represents the amount of loans and other lending investments that do not have any legal claim against it. Other investments (Unencumbered Assets) Unencumbered other investments Represents the amount of other investments owned that do not have any legal claim against it. Cash and other assets (Unencumbered Assets) Cash and other assets not pledged as collateral Cash and other assets not pledged as collateral Total (Unencumbered Assets) Unencumbered Assets Based on Recorded Carrying Value Represents the amount of owned assets based on their recorded carrying value that do not have any legal claim against them. Reserve for loan losses Reconciliation of segment profit (loss) to income (loss) from continuing operations Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Abstract] Segment profit (loss) Less: Provision for loan losses Less: Impairment of assets(2) Segment Asset Impairment Charges Segment Asset Impairment Charges Less: Stock-based compensation expense Less: Depreciation and amortization(2) Segment Depreciation and Amortization Segment Depreciation and Amortization Less: Income tax (expense) benefit(2) Segment Interest Expense Segment Interest Expense Add: Gain (loss) on early extinguishment of debt, net Net income (loss) 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 Shares Issued and Outstanding (in thousands) 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) 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. Amount of preferred dividends in arrears Preferred Stock, Amount of Preferred Dividends in Arrears Real Estate Real Estate Disclosure [Text Block] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping, Disclosure Item Amounts [Axis] Fair Value, by Balance Sheet Grouping, Disclosure Item Amounts [Axis] Fair Value, Disclosure Item Amounts [Domain] Fair Value, Disclosure Item Amounts [Domain] Fair Value Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] 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) Accumulated Other Comprehensive Income (Loss) [Member] Treasury Stock at Cost Treasury Stock [Member] Noncontrolling Interests Noncontrolling Interest [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance Issuance of Preferred Stock Stock Issued During Period, Value, New Issues Dividends declared—preferred Dividends, Preferred Stock, Cash Issuance of stock/restricted stock 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. Net loss for the period(2) 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) Additional paid-in capital attributable to redeemable noncontrolling interest(4) Adjustments to Additional Paid in Capital, Reallocation of Noncontrolling Interest Contributions from noncontrolling interests(3) Noncontrolling Interest, Increase from Equity Issuance or Sale of Parent Equity Interest Distributions to noncontrolling interests(4) Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Balance Preferred stock issued Preferred Stock, Value, Public Offering Shares Issued Preferred Stock, Value, Public Offering Shares Issued Preferred stock, stated percentage Preferred Stock, Stated Percentage Preferred Stock, Stated Percentage Convertible preferred stock, shares issued upon conversion Convertible Preferred Stock, Shares Issued upon Conversion Convertible preferred stock, conversion price (in dollars per share) Convertible Preferred Stock, Conversion Price Convertible Preferred Stock, Conversion Price Preferred stock, liquidation redemption price percent of liquidation preference Preferred Stock, Liquidation Redemption Price, Percent of Liquidation Preference Preferred Stock, Liquidation Redemption Price, Percent of Liquidation Preference Dividends [Abstract] Dividends [Abstract] Minimum percentage of taxable income (excluding net capital gains) to be distributed in order to qualify as REIT 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. 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 Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Table Text Block] Schedule of derivative instruments Schedule of Derivative Instruments [Table Text Block] Schedule of qualifying cash flow hedges Schedule of Qualifying Cash Flow Hedges [Table Text Block] Schedule of Qualifying Cash Flow Hedges [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 (loss) to income (loss) from continuing operations Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] Revenues: Revenues [Abstract] Costs and expenses: Costs and Expenses [Abstract] Interest expense Interest Expense Real estate expense Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction General and administrative General and Administrative Expense Impairment of assets Asset Impairment Charges 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. Gain (loss) on early extinguishment of debt, net Income (loss) from continuing operations before income taxes Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Income tax (expense) benefit Income Tax Expense (Benefit) Income (loss) from continuing operations(1) Income (loss) from discontinued operations Net income (loss) attributable to iStar Financial Inc. Net Income (Loss) Attributable to Parent Net (income) loss allocable to HPU holders and Participating Security holders(2)(3) 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 Per common share data(1): Per Common Share Data [Abstract] Income (loss) attributable to iStar Financial Inc. from continuing operations: Income (Loss) from Continuing Operations Attributable to Parent [Abstract] Basic and diluted (in dollars per share) Net income (loss) attributable to iStar Financial Inc.: Basic and diluted (in dollars per share) Weighted average number of common shares—basic and diluted Weighted Average Number of Shares Outstanding, Basic and Diluted Per HPU share data(1)(2): Per HPU Share Data [Abstract] Income (loss) attributable to iStar Financial Inc. from continuing operations: Income (Loss) from Continuing Operations Attributable to Parent (HPU) Abstract -- None. No documentation exists for this element. -- 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 Financial Inc.: Net Income (Loss) Attributable to Parent [Abstract] Basic and diluted (in dollars per share) Earnings Per HPU Share, Basic and Diluted Earnings Per HPU Share, Basic and Diluted Weighted average number of HPU shares—basic and diluted Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Table] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Table] Condominium Units Condominium Units [Member] Condominium Units [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] Number of condominium units sold Number of Condominium Units Sold Number of Condominium Units Sold Gain (Loss) on disposition of property, sale carve out Gain (Loss) on Disposition of Property, Sale Carve Out Gain (Loss) on Disposition of Property, Sale Carve Out iStar's ownership percentage, equity method Gain (Loss) on Disposition of Property Gain (Loss) on Disposition of Property Number of real estate properties sold Number of Real Estate Properties Sold Number of Real Estate Properties Sold Net lease assets sold, carrying value Property Subject To Or Available For Operating Lease Sold Aggregate Carrying Value Property Subject To Or Available For Operating Lease Sold Aggregate Carrying Value Gain (loss) on sale of leased assets, net, operating leases, sale carve out Gain (Loss) on Sale of Leased Assets, Net, Operating Leases, Sale Carve Out Gain (Loss) on Sale of Leased Assets, Net, Operating Leases, Sale Carve Out Property subject to or available for operating lease transferred aggregate carrying value Property Subject To Or Available For Operating Lease Transferred Aggregate Carrying Value Property Subject To Or Available For Operating Lease Transferred Aggregate Carrying Value Carrying value of LNR at beginning of period Equity in earnings of LNR for the period Balance before other than temporary impairment Equity Method Investment, Carrying Value Before OTTI Equity Method Investment, Carrying Value Before OTTI Other than temporary impairment Equity Method Investment, Other than Temporary Impairment Sales proceeds pursuant to contract Carrying value of LNR at end of period Deferred expenses and other assets, net Deferred Expenses and other Assets Net [Abstract] -- None. No documentation exists for this element. -- Deferred financing fees, net(1) Deferred Finance Costs, Net Other receivables Other Receivables Leasing costs, net(2) Deferred Costs, Leasing, Net Derivative asset Derivative Assets Prepaid expenses Prepaid Expense Corporate furniture, fixtures and equipment, net(3) 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. Other assets Other Assets Deferred expenses and other assets, net Accumulated amortization of deferred financing fees Accumulated Amortization, Deferred Finance Costs 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. Accounts payable, accrued expenses and other liabilities Accounts Payable and Accrued Liabilities [Abstract] 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 Property taxes payable Accrual for Taxes Other than Income Taxes Unearned operating lease income Deferred Revenue, Leases, Net Derivative liabilities Derivative Liabilities Security deposits and other investment deposits Security Deposits and Other Investment Deposits Represents security deposits and other investment deposits as of the balance sheet date. Other liabilities Other Liabilities Accounts payable, accrued expenses and other liabilities Restricted cash collateralizing a letter of credit, disbursed Restricted Cash Related to Collateralized Letter of Credit, Disbursed Restricted Cash Related to Collateralized Letter of Credit, Disbursed