Income Taxes - Components of Income Tax Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Federal
Current	$ 85,330	$ 95,046	$ 93,345
Deferred	16,903	17,631	(6,023)
Federal income tax expense, total	102,233	112,677	87,322
State
Current	16,082	16,973	17,093
Deferred	(1,068)	368	(553)
State and local income tax expense, total	15,014	17,341	16,540
Foreign
Current	137,076	147,174	127,567
Deferred	0	0	0
Foreign income tax expense, total	137,076	147,174	127,567
Total
Current	238,488	259,193	238,005
Deferred	15,835	17,999	(6,576)
Income tax expense	$ 254,323	$ 277,192	$ 231,429