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Fair Value Measurements - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Credit valuation adjustment included in fair value of credit derivative liabilities | $ 10,124 | $ 15,910
Credit valuation adjustment included in fair value of derivative liabilities other than credit derivatives | $ 78,728 | 64,547
Percentage of CDS gross par outstanding used in the determination of CDS fair values | 93.00% |
Percentage of CDS derivative liability used in the determination of CDS fair values | 43.00% |
Percentage of CDS gross par outstanding using internally estimated reference obligation prices in determination of fair value | 7.00% |
Percentage of CDS liability using internally estimated reference obligation prices in determination of fair value | 57.00% |
Additional basis point fee need to receive for issuing a CDS on obligation | 0.05% |
Additional basis points fee increase on change of reference obligation spread | 0.15% |
Revised relative change ratio of CDS fee to cash market spread | 73.20% |
Estimated remaining life | 8 years |
Notional outstanding | $ 970,883 | 1,529,759
Derivative liabilities | $ 34,543 | $ 73,459
Weighted average discounted rate of estimated future premium payments to be paid by the VIEs | 2.70% | 2.70%
Credit Derivatives [Member] |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
CVA percentage | 22.70% | 17.80%
European ABS Transactions [Member] | Level 3 [Member] |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Fair value of consolidated VIE debt obligations valued using unobservable inputs by asset class | $ 3,016,966 | $ 1,070,439
US Commercial ABS Transaction [Member] | Level 3 [Member] |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Fair value of consolidated VIE debt obligations valued using unobservable inputs by asset class | $ 163,204 | $ 193,225
Minimum [Member] |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Basis point fee received for issuing a CDS on reference obligation base fee | 0.20% |
Credit spread of reference obligation of a base transaction | 0.80% |
Relative change ratio of CDS fee to cash market spread | 25.00% |
Maximum [Member] |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Basis point fee received for issuing a CDS on reference obligation hypothetical fee | 0.25% |
Relative change ratio of CDS fee to cash market spread | 35.00% | 35.00%
Credit spread of reference obligation of revised transaction | 1.00% |
Internal Credit Rating [Member] | Minimum [Member] |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Revised relative change ratio of CDS fee to cash market spread | 33.00% |
Internal Credit Rating [Member] | Maximum [Member] |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Full relative change ratio of CDS fee to cash market spread | 100.00% |
Successor [Member] |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Notional outstanding | $ 970,883 | $ 1,529,759
Available-for-sale Securities | $ 5,334,120 | $ 5,150,018
Successor [Member] | Fixed Income Securities [Member] |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Percentage of investment portfolio valued using dealer quotes | 9.00% | 10.00%
Successor [Member] | U.S. Agency Obligations [Member] | Level 3 [Member] |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Available-for-sale Securities | $ 0 | $ 0
Successor [Member] | Asset-backed Securities [Member] | Level 3 [Member] |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Available-for-sale Securities | 0 | 0
Successor [Member] | Residential Mortgage-Backed Securities [Member] | Level 3 [Member] |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Available-for-sale Securities | 488,884 | $ 194,393
Successor [Member] | Corporate Obligations [Member] |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Coupon rate |  | 0.345%
Successor [Member] | Corporate Obligations [Member] | Level 3 [Member] |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Fair value of investments in corporate obligation securities classified as Level 3 in the fair value hierarchy | 0 | $ 3,808
Available-for-sale Securities | 0 | 3,808
Successor [Member] | Collateralized Debt Obligations [Member] | Level 3 [Member] |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Available-for-sale Securities | $ 0 | $ 0
Successor [Member] | Minimum [Member] | Fixed Income Securities [Member] |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Percentage of investment portfolio valued using internal valuation models | 9.00% | 4.00%
Successor [Member] | Maximum [Member] | Fixed Income Securities [Member] |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Percentage of investment portfolio valued using external pricing services | 82.00% | 86.00%
Collateralized Loan Obligations [Member] | Successor [Member] |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
CVA percentage | 8.34% | 5.40%
Fair value of derivative liabilities | $ 1,837 | $ 2,027
Notional outstanding | $ 295,253 | $ 549,923
Fair Value Input Weighted Average Obligation Price | $ 98.4 | $ 98.9
Fair Value Input Weighted Average Life | 1 year 1 month | 1 year 9 months
Fair Value Input Weighted Average Credit Rating | AA | AA
Fair Value Input Weighted Average Relative Change Ratio | 36.30% | 35.90%
Underlying, Other [Member] | Successor [Member] |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
CVA percentage | 23.34% | 15.82%
Fair value of derivative liabilities | $ 32,697 | $ 71,104
Notional outstanding | $ 617,148 | $ 921,036
Fair Value Input Weighted Average Obligation Price | $ 85.2 | $ 86.8
Fair Value Input Weighted Average Life | 6 years 1 month | 5 years 8 months
Fair Value Input Weighted Average Credit Rating | BBB+ | BBB-
Fair Value Input Weighted Average Relative Change Ratio | 33.30% | 49.00%
Variable Interest Entity, Primary Beneficiary [Member] |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Weighted average discounted rate of estimated future premium payments to be paid by the VIEs | 4.40% | 4.10%
Variable Interest Entity, Primary Beneficiary [Member] | Successor [Member] | Corporate Obligations [Member] | Level 3 [Member] |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Available-for-sale Securities | $ 2,588,556 | $ 2,743,050
Variable Interest Entity, Primary Beneficiary [Member] | Successor [Member] | European ABS Transactions [Member] |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Coupon rate | 1.38% | 0.30%
Variable Interest Entity, Primary Beneficiary [Member] | Successor [Member] | US Commercial ABS Transaction [Member] |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |
Coupon rate | 5.88% | 5.88%

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