Income Taxes - Effective Income Tax Reconciliation (Detail) (USD $) In Thousands, unless otherwise specified	0 Months Ended	12 Months Ended
	Jul. 01, 2013	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Effective Income Tax Rate Reconciliation, Deduction, Amount [Abstract]
U.S. federal statutory income tax expense		$ 29,815		$ 8,742		$ 9,249
Income not subject to U.S. corporate income tax		0		(15,583)		(7,095)
U.S. state and local income taxes, net of U.S. federal income tax effect		(4,495)		1,881		772
Deferred tax benefit resulting from the Company becoming subject to U.S. corporate income taxes	(103,500)	0		(103,499)		0
Nondeductible expenses		230	[1]	3,627	[1]	200	[1]
Foreign taxes		(1,371)		3,603		7,468
Federal research & development tax credits		(1,241)		0		0
Other, net		(185)		115		(318)
Income tax expense (benefit)		$ 22,753		$ (101,114)		$ 10,276

[1] Nondeductible expenses include nondeductible compensation and meals and entertainment.