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Other Investments (Details) (USD $) | 12 Months Ended | 1 Months Ended | 2 Months Ended | 12 Months Ended |  | 2 Months Ended | 3 Months Ended |  |  | 3 Months Ended | 12 Months Ended |  | 12 Months Ended |  | 1 Months Ended | 12 Months Ended |  |  | 12 Months Ended |  |  |
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Jul. 31, 2010 LNR Property LLC ("LNR") | Sep. 30, 2010 LNR Property LLC ("LNR") | Dec. 31, 2012 LNR Property LLC ("LNR") | Sep. 30, 2012 LNR Property LLC ("LNR") | Dec. 31, 2011 LNR Property LLC ("LNR") | Sep. 30, 2011 LNR Property LLC ("LNR") | Dec. 31, 2010 LNR Property LLC ("LNR") | Jul. 28, 2010 LNR Property LLC ("LNR") | Sep. 30, 2010 LNR and certain commercial mortgage backed securities and collateralized debt obligation trusts that are considered VIEs | Mar. 31, 2012 LNR and certain commercial mortgage backed securities and collateralized debt obligation trusts that are considered VIEs | Mar. 31, 2011 LNR and certain commercial mortgage backed securities and collateralized debt obligation trusts that are considered VIEs | Sep. 30, 2012 LNR and certain commercial mortgage backed securities and collateralized debt obligation trusts that are considered VIEs | Sep. 30, 2011 LNR and certain commercial mortgage backed securities and collateralized debt obligation trusts that are considered VIEs | Mar. 31, 2012 Madison Funds | Dec. 31, 2012 Madison Funds | Dec. 31, 2011 Madison Funds | Dec. 31, 2010 Madison Funds | Dec. 31, 2012 Madison International Real Estate Fund IILP | Dec. 31, 2012 Madison International Real Estate Fund IIILP | Dec. 31, 2012 Madison GP1 Investors LP | Dec. 31, 2012 Oak Hill Funds | Dec. 31, 2011 Oak Hill Funds | Dec. 31, 2010 Oak Hill Funds | Dec. 31, 2012 Oak Hill Funds Group 2 | Oct. 31, 2011 Oak Hill Advisors | Dec. 31, 2012 Oak Hill Advisors | Dec. 31, 2011 Oak Hill Advisors | Dec. 31, 2012 Real estate equity investments | Dec. 31, 2011 Real estate equity investments | Dec. 31, 2010 Real estate equity investments | Dec. 31, 2012 Other equity method investments | Dec. 31, 2011 Other equity method investments | Dec. 31, 2010 Other equity method investments | Dec. 31, 2012 Equity method investments excluding LNR | Dec. 31, 2011 Equity method investments excluding LNR | Dec. 31, 2010 Equity method investments excluding LNR | Dec. 31, 2012 Minimum Real estate equity investments | Dec. 31, 2012 Maximum Real estate equity investments | Dec. 31, 2012 Net Lease Assets Real estate equity investments | Dec. 31, 2011 Net Lease Assets Real estate equity investments | Dec. 31, 2012 Operating Properties Real estate equity investments | Dec. 31, 2011 Operating Properties Real estate equity investments | Dec. 31, 2012 Land Real estate equity investments | Dec. 31, 2011 Land Real estate equity investments
Equity method investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying value | $ 387,718,000 | $ 445,835,000 |  |  |  |  | $ 205,773,000 | $ 205,773,000 | [1] | $ 159,764,000 | $ 159,764,000 | [1] |  |  |  |  |  |  |  |  | $ 56,547,000 | $ 103,305,000 |  |  |  |  | $ 29,840,000 | $ 56,817,000 |  |  |  |  |  | $ 47,619,000 | $ 69,100,000 |  | $ 47,939,000 | [2] | $ 56,849,000 | [2] |  |  |  |  |  |  |  | $ 16,400,000 | $ 16,300,000 | $ 25,700,000 | $ 38,000,000 | $ 5,500,000 | $ 14,800,000
Earnings (loss) from equity method investments | 103,009,000 | 95,091,000 | 51,908,000 |  | 1,797,000 | [1] | 60,669,000 | 60,669,000 | [1] | 53,861,000 | 53,861,000 | [1] | 1,797,000 |  |  |  |  |  |  | 13,700,000 | 10,246,000 | 3,641,000 | 9,717,000 |  |  |  | 5,844,000 | 1,918,000 | 11,613,000 |  |  |  |  | 21,636,000 | (5,273,000) | 2,522,000 | 4,614,000 | [2] | 40,944,000 | [2] | 26,259,000 | [2] |  |  |  |  |  |  |  | 26,000,000 |  |  |
Other, carrying value | 11,125,000 | 12,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total other investments, carrying value | 398,843,000 | 457,835,000 | 532,358,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Included within earnings from equity method investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 38,400,000 | 22,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership acquired by the Company and a group of investors |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contribution towards principal amount of Holdco Notes |  |  |  | 100,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of cash contributed in exchange for equity interest |  |  |  | 100,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest in investee |  |  |  |  |  |  |  |  |  |  |  |  |  | 120,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal value loan, discounted payoff |  |  |  |  |  |  |  |  |  |  |  |  |  | 25,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from discounted payoff of principal amount of loan |  |  |  | 24,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue |  |  |  |  | 40,022,000 | [1],[3] |  | 332,902,000 | [1],[3] |  | 327,032,000 | [1],[3] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 401,870,000 | 198,340,000 | 590,265,000 |  |  |  |  |  |  |  |
Income tax expense (benefit)(3) |  |  |  |  | 685,000 | [1],[4] |  | 6,731,000 | [1],[4] |  | (76,558,000) | [1],[4] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) attributable to parent entities |  |  |  |  | 7,495,000 | [1] |  | 253,039,000 | [1] |  | 225,190,000 | [1] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 304,960,000 | 97,066,000 | 342,661,000 |  |  |  |  |  |  |  |
iStar's ownership percentage |  |  |  |  | 24.00% | [1] |  | 24.00% | [1] |  | 24.00% | [1] |  | 24.00% |  |  |  |  |  |  |  |  |  | 29.52% | 32.92% | 29.52% |  |  |  | 5.92% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 31.00% | 70.00% |  |  | 33.00% |  |  |
Balance Sheets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total assets |  |  |  |  |  |  |  | 1,384,337,000 | [1],[3] |  | 1,288,923,000 | [1],[3] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,830,087,000 | 3,079,736,000 |  |  |  |  |  |  |  |  |
Total debt(2) |  |  |  |  |  |  |  | 398,912,000 | [1],[3] |  | 469,631,000 | [1],[3] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total liabilities |  |  |  |  |  |  |  | 517,088,000 | [1],[3] |  | 576,835,000 | [1],[3] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 163,164,000 | 197,246,000 |  |  |  |  |  |  |  |  |
Noncontrolling interests |  |  |  |  |  |  |  | 1,560,000 | [1] |  | 39,940,000 | [1] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 29,553,000 | 4,139,000 |  |  |  |  |  |  |  |  |
Total equity |  |  |  |  |  |  |  | 865,689,000 | [1] |  | 672,147,000 | [1] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,637,370,000 | 2,878,351,000 |  |  |  |  |  |  |  |  |
Cash Flows |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distributions from operations of equity method investments | 105,586,000 | 85,766,000 | 32,651,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total VIE trust assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 97,520,000,000 | 126,660,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total VIE trust liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 97,210,000,000 | 126,640,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Servicing fee revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 16,800,000 | 95,400,000 | 119,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of ownership interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 183,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net gain from sale of ownership interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 30,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | The Company records its investment in LNR on a one quarter lag, therefore, amounts in the Company's financial statements for the year ended December 31, 2012 and 2011 are based on balances and results from LNR for the years ended September 30, 2012 and 2011. LNR was acquired in July of 2010, therefore results for the year ended December 31, 2010 are based on balances from LNR for the period July 29, 2010 to September 30, 2010.
[2] | years ended December 31, 2011 and 2010, amounts include $38.4 million and $22.4 million, respectively, of earnings related to Oak Hill Advisors, L.P. and related entities that were sold in October 2011.Equi
[3] | LNR consolidates certain commercial mortgage-backed securities and collateralized debt obligation trusts that are considered VIEs (and for which it is the primary beneficiary), that have been excluded from the amounts presented above. As of September 30, 2012 and 2011, the assets of these trusts, which aggregated approximately $97.52 billion and $126.66 billion, respectively, were the sole source of repayment of the related liabilities, which aggregated approximately $97.21 billion and $126.64 billion, respectively, and are non-recourse to LNR and its equity holders, including the Company. In addition, total revenue presented above includes $95.4 million, $119.0 million and $16.8 million for the years ended September 30, 2012, 2011 and for the period July 29, 2010 to September 30, 2010, respectively, of servicing fee revenue that is eliminated upon consolidation of the VIE's at the LNR level. This income is then added back through consolidation at the LNR level as an adjustment to income allocable to noncontrolling entities and has no net impact on net income attributable to LNR.
[4] | During the year ended December 31, 2011, LNR recorded an income tax benefit from the settlement of certain tax liabilities.

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