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Derivative Instruments - Summarize Information by Major Category of CDS Contracts (Detail) $ in Thousands | Sep. 30, 2015 USD ($) Transactions | Dec. 31, 2014 USD ($) Transactions
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Summary of information by major category of CDS contracts |  |
Gross principal notional outstanding | $ 1,313,797 | $ 1,529,759
Successor [Member] |  |
Summary of information by major category of CDS contracts |  |
Number of CDS transactions | Transactions | 14 | 16
CLO [Member] | Successor [Member] |  |
Summary of information by major category of CDS contracts |  |
Number of CDS transactions | Transactions | 5 | 6
Gross principal notional outstanding | $ 341,668 | $ 549,923
CLO [Member] | Successor [Member] | Credit Derivatives [Member] |  |
Summary of information by major category of CDS contracts |  |
Net derivative liabilities at fair value | $ 1,740 | $ 2,027
Other [Member] | Successor [Member] |  |
Summary of information by major category of CDS contracts |  |
Number of CDS transactions | Transactions | 9 | 10
Gross principal notional outstanding | $ 972,129 | $ 979,836
Other [Member] | Successor [Member] | Credit Derivatives [Member] |  |
Summary of information by major category of CDS contracts |  |
Net derivative liabilities at fair value | $ 28,147 | $ 71,432

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Fair value, after offset of derivative asset, of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, elected not to be and before offset against a right to receive collateral under a master netting arrangement. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56946850&loc=d3e41678-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226006-175313 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226008-175313 + Details
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