Income Taxes - Provision for Income Tax Schedule (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current tax provision (benefit):
Federal	$ 89,816	$ 70,298	$ 153,471
State	6,238	(1,750)	4,978
Foreign	39,952	62,572	13,259
Deferred tax provision (benefit):
Federal	4,265	23,381	(13,073)
State	(86)	(742)	(15,220)
Foreign	3,916	(18,536)	2,442
Change in valuation allowance	(787)	(5)	(29)
Total	$ 143,314	$ 135,218	$ 145,828