v2.4.0.8

Realized and Net Change in Unrealized Gains (Losses) on Financial Instruments on Financial Instruments on Which Fair Value Option was Elected (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Realized Gains (Losses) | Assets |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Realized and net change in unrealized gains (losses) on financial instruments | $ 41,831 | $ (33,271) | $ 90,709
Realized Gains (Losses) | Liabilities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Realized and net change in unrealized gains (losses) on financial instruments | (6,078) | 17 | 10,492
Realized Gains (Losses) | Loans And Receivables |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Realized and net change in unrealized gains (losses) on financial instruments | 43 | (308) |
Realized Gains (Losses) | Equity and Preferred Securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Realized and net change in unrealized gains (losses) on financial instruments | (2,833) | (353) |
Realized Gains (Losses) | Corporate Loans |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Realized and net change in unrealized gains (losses) on financial instruments | 37,464 | (35,428) | 76,314
Realized Gains (Losses) | Corporate Bonds |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Realized and net change in unrealized gains (losses) on financial instruments | 4,510 | 393 | 1,099
Realized Gains (Losses) | Other |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Realized and net change in unrealized gains (losses) on financial instruments | 2,647 | 2,425 | 13,296
Realized Gains (Losses) | Senior Secured Notes |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Realized and net change in unrealized gains (losses) on financial instruments | (6,078) | 17 | 5,798
Realized Gains (Losses) | Subordinated Notes |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Realized and net change in unrealized gains (losses) on financial instruments |  |  | 4,694
Net Change In Unrealized Gains (Losses) | Assets |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Realized and net change in unrealized gains (losses) on financial instruments | 173,606 | 579,906 | (374,871)
Net Change In Unrealized Gains (Losses) | Liabilities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Realized and net change in unrealized gains (losses) on financial instruments | (388,664) | (672,391) | 102,128
Net Change In Unrealized Gains (Losses) | Loans And Receivables |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Realized and net change in unrealized gains (losses) on financial instruments | (1,101) | (375) | (228)
Net Change In Unrealized Gains (Losses) | Equity and Preferred Securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Realized and net change in unrealized gains (losses) on financial instruments | 7,273 | 500 |
Net Change In Unrealized Gains (Losses) | Corporate Loans |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Realized and net change in unrealized gains (losses) on financial instruments | 172,968 | 554,628 | (396,946)
Net Change In Unrealized Gains (Losses) | Corporate Bonds |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Realized and net change in unrealized gains (losses) on financial instruments | (5,058) | 13,264 | (7,605)
Net Change In Unrealized Gains (Losses) | Other |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Realized and net change in unrealized gains (losses) on financial instruments | (476) | 11,889 | 29,908
Net Change In Unrealized Gains (Losses) | Senior Secured Notes |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Realized and net change in unrealized gains (losses) on financial instruments | (485,655) | (603,250) | 58,067
Net Change In Unrealized Gains (Losses) | Subordinated Notes |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Realized and net change in unrealized gains (losses) on financial instruments | $ 96,991 | $ (69,141) | $ 44,061

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- Definition For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612 + Details
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