Income Taxes - Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
U.S. federal	$ 101,443	$ 106,700	$ 709
U.S. state and local	(2,245)	19,665	4,081
Non U.S.	471	958	(828)
Current income tax expense	99,669	127,323	3,962
Deferred:
U.S. federal	32,635	25,221	30,331
U.S. state and local	13,673	(16,803)	(10,997)
Non U.S.	(5,246)	(4,883)	(543)
Deferred income tax expense (benefit)	41,062	3,535	18,791
Provision for income taxes	$ 140,731	$ 130,858	$ 22,753