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Financial Instruments - Schedule of Other Investments, at Fair Value (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Schedule of Investments [Line Items] |  |
Cost | $ 39,192 | $ 37,299
Carrying Value | 38,323 | 42,772
Unrealized Gain / (Loss) | (869) | 5,473
Interests in securitizations [Member] |  |
Schedule of Investments [Line Items] |  |
Cost | 217 | 217
Carrying Value | 77 | 88
Unrealized Gain / (Loss) | (140) | (129)
Equity securities [Member] |  |
Schedule of Investments [Line Items] |  |
Cost | 38,745 | 36,804
Carrying Value | 37,991 | 42,417
Unrealized Gain / (Loss) | (754) | 5,613
Equity securities [Member] | EuroDekania [Member] |  |
Schedule of Investments [Line Items] |  |
Cost | 7,807 | 7,792
Carrying Value | 2,054 | 2,370
Unrealized Gain / (Loss) | (5,753) | (5,422)
Equity securities [Member] | Star Asia [Member] |  |
Schedule of Investments [Line Items] |  |
Cost | 23,304 | 23,219
Carrying Value | 30,169 | 37,358
Unrealized Gain / (Loss) | 6,865 | 14,139
Equity securities [Member] | Tiptree [Member] |  |
Schedule of Investments [Line Items] |  |
Cost | 5,561 | 5,561
Carrying Value | 2,834 | 2,533
Unrealized Gain / (Loss) | (2,727) | (3,028)
Equity securities [Member] | Star Asia Special Situations Fund [Member] |  |
Schedule of Investments [Line Items] |  |
Cost | 1,841 |
Carrying Value | 2,503 |
Unrealized Gain / (Loss) | 662 |
Equity securities [Member] | Other securities [Member] |  |
Schedule of Investments [Line Items] |  |
Cost | 232 | 232
Carrying Value | 431 | 156
Unrealized Gain / (Loss) | 199 | (76)
Residential loans [Member] |  |
Schedule of Investments [Line Items] |  |
Cost | 230 | 278
Carrying Value | 255 | 267
Unrealized Gain / (Loss) | $ 25 | $ (11)

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- Definition Other investments represent investments (other than investments-trading) owned that were accounted for at fair value with unrealized and realized gains and losses recorded in the statement of operations. + References No definition available. + Details
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- Definition Other investments, unrealized gain/(loss). + References No definition available. + Details
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- Details
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