Income Taxes - Components of Income Tax Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Federal
Current	$ 45,996	$ 101,821	$ 85,330
Deferred	(9,759)	(42,474)	16,903
Federal income tax expense, total	36,237	59,347	102,233
State
Current	13,262	20,490	16,082
Deferred	(2,272)	(1,221)	(1,068)
State and local income tax expense, total	10,990	19,269	15,014
Foreign
Current	151,312	149,596	137,076
Deferred	0	0	0
Foreign income tax expense, total	151,312	149,596	137,076
Total
Current	210,570	271,907	238,488
Deferred	(12,031)	(43,695)	15,835
Income tax expense	$ 198,539	$ 228,212	$ 254,323