Income Taxes - Provision for Income Tax Schedule (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current tax provision (benefit):
Federal	$ 70,298	$ 153,471	$ 77,671
State	(1,750)	4,978	8,034
Foreign	62,572	13,259	13,019
Deferred tax provision (benefit):
Federal	23,381	(13,073)	24,210
State	(742)	(15,220)	(1,106)
Foreign	(18,536)	2,442	1,869
Change in valuation allowance	(5)	(29)	2,370
Total	$ 135,218	$ 145,828	$ 126,067