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Investments - Summary of Sources of Collateral Received and Various Investment Agreement in which Collateral Pledged (Detail) - Successor [Member] - Cash and Securities Pledged Directly from Investment Portfolio [Member] - USD ($) $ in Thousands | Sep. 30, 2015 | Dec. 31, 2014
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Investment [Line Items] |  |
Fair Value of Cash and Underlying Securities | $ 348,584 | $ 379,423
Fair Value of Cash and Securities Pledged to Investment and Repurchase Agreement Counterparties | 108,398 | 156,916
Fair Value of Cash and Securities Pledged to Derivative Counterparties | $ 240,186 | $ 222,507

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- Definition Fair value of cash and securities pledged to derivative counterparties. + References No definition available. + Details
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- Definition Fair value of cash and securities pledged to investment and repurchase agreement counterparties. + References No definition available. + Details
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- Definition Total fair value of cash and underlying securities pledged. + References No definition available. + Details
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- Definition Line items represent reporting concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 12 -Sentence Column A + Details
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