Income Taxes - Provisions for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
Domestic	$ 11,028	$ 17,856	$ 45,468
Foreign	65,132	106,575	73,568
Total current	76,160	124,431	119,036
Deferred:
Domestic	40,284	73,520	56,115
Foreign	(11,194)	(2,803)	(4,315)
Total deferred	29,090	70,717	51,800
Total provision for income taxes	105,250	195,148	170,836
Cash taxes paid	$ 119,591	$ 139,724	$ 113,760