Income Taxes - Components of Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	12 Months Ended
	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Current income taxes, Federal				$ 147,406	$ 82,926	$ 39,168
Current income taxes, State				10,725	8,051	8,208
Current income taxes, Foreign				61,084	51,970	55,144
Total current				219,215	142,947	102,520
Deferred income taxes, Federal				(18,723)	36,723	41,814
Deferred income taxes, State				1,608	1,525	(596)
Deferred income taxes, Foreign				(11,566)	(7,622)	498
Total deferred				(28,681)	30,626	41,716
Total provision	$ 46,095	$ 45,822	$ 91,917	$ 190,534	$ 173,573	$ 144,236