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Comprehensive Income - Schedule of Changes in Balances of Each Component of Accumulated Other Comprehensive Income (Detail) - Successor [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	$ 95,362	$ 306,328	$ 220,283	$ 11,661
Other comprehensive income before reclassifications	(29,295)	(50,256)	(109,337)	245,035
Amounts reclassified from accumulated other comprehensive income	6,820	(5,207)	(38,059)	(5,831)
Net current period other comprehensive income	(22,475)	(55,463)	(147,396)	239,204
Ending Balance	72,887	250,865	72,887	250,865
Unrealized Gains (Losses) on Available-for-Sale Securities [Member]
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	79,406	231,975	210,693	(41,910)
Other comprehensive income before reclassifications	1,342	(12,222)	(85,313)	261,879
Amounts reclassified from accumulated other comprehensive income	7,040	(5,003)	(37,592)	(5,219)
Net current period other comprehensive income	8,382	(17,225)	(122,905)	256,660
Ending Balance	87,788	214,750	87,788	214,750
Other Postretirement Benefit Plan, Defined Benefit [Member]
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	9,784	10,439	10,031	10,847
Other comprehensive income before reclassifications	0	0	0	0
Amounts reclassified from accumulated other comprehensive income	(220)	(204)	(467)	(612)
Net current period other comprehensive income	(220)	(204)	(467)	(612)
Ending Balance	9,564	10,235	9,564	10,235
Accumulated Translation Adjustment [Member]
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	6,172	63,914	(441)	42,724
Other comprehensive income before reclassifications	(30,637)	(38,034)	(24,024)	(16,844)
Amounts reclassified from accumulated other comprehensive income	0	0	0	0
Net current period other comprehensive income	(30,637)	(38,034)	(24,024)	(16,844)
Ending Balance	$ (24,465)	$ 25,880	$ (24,465)	$ 25,880

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Changes In Accumulated Other Comprehensive Income [Roll Forward]

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Net of tax amount of other comprehensive income (loss) excluding noncontrolling interest.

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 220



-SubTopic 10



-Section 45



-Paragraph 11



-URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e637-108580



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



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-Section 45



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-URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e681-108580



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-Publisher FASB



-Name Accounting Standards Codification



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-Section 45



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-URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580



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-Publisher SEC



-Name Regulation S-X (SX)



-Number 210



-Section 02



-Paragraph 31



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-Number 210



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Amount after tax, before reclassification adjustments of other comprehensive income (loss).

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-Publisher FASB



-Name Accounting Standards Codification



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Amount after tax of reclassification adjustments of other comprehensive income (loss).

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Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



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