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Investments - Summary of Sources of Collateral Received and Various Investment Agreement in which Collateral Pledged (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Investment [Line Items]
Fair Value of Securities Placed in Trust	$ 369,127	$ 396,100
Successor [Member] | Cash and Securities Pledged Directly from Investment Portfolio [Member]
Investment [Line Items]
Fair Value of Cash and Underlying Securities	370,964	338,007
Fair Value of Cash and Securities Pledged to Investment and Repurchase Agreement Counterparties	88,933	108,379
Fair Value of Cash and Securities Pledged to Derivative Counterparties	$ 282,031	$ 229,628

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- Definition

Fair value of cash and securities pledged to derivative counterparties.

+ References

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- Definition

Fair value of cash and securities pledged to investment and repurchase agreement counterparties.

+ References

No definition available.

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- Definition

Total fair value of cash and underlying securities pledged.

+ References

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- Definition

Fair Value of Securities Placed in Trust

+ References

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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

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