Income Taxes - Schedule Reconciles United States Statutory Federal Rate to Income Tax Provision (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Tax at U.S. statutory rate	$ 68,166	$ 53,546	$ 30,899
State and local taxes	2,564	3,441	2,203
Tax credits	(10,348)	(8,139)	(23,956)
Changes in tax law	8,813	3,630	(128)
Effect of foreign tax rates	(19,600)	(6,465)	(767)
Nonrecurring permanent items	0	(11,300)	0
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount	(5,305)	0	0
Other changes in tax reserves	116	(368)	2,803
Valuation allowance	9,112	11,638	28,985
Other, net	803	(4,765)	2,771
Income tax provision	$ 54,321	$ 41,218	$ 42,810
Effective income tax rate	27.90%	26.90%	48.50%