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Investments - Summary of Sources of Collateral Received and Various Investment Agreement in which Collateral Pledged (Detail) - USD ($) $ in Thousands | Jun. 30, 2017 | Dec. 31, 2016
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Investment [Line Items] |  |
Fair Value Of Securities Deposited With Governmental Authorities | $ 6,021 | $ 5,872
Fair Value of Securities Placed in Trust | 352,446 | 360,759
Successor [Member] | Cash and Securities Pledged Directly from Investment Portfolio [Member] |  |
Investment [Line Items] |  |
Fair Value of Cash and Underlying Securities | 117,905 | 291,545
Fair Value of Cash and Securities Pledged to Investment and Repurchase Agreement Counterparties | 0 | 88,940
Fair Value of Cash and Securities Pledged to Derivative Counterparties | $ 117,905 | $ 202,605

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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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