Income Taxes - Provision Benefit for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current
U.S.	$ 67,793	$ 91,641	$ 67,668
State and local	8,056	9,342	4,503
Foreign	46,862	50,775	42,540
Total current	122,711	151,758	114,711
Deferred
U.S.	(5,471)	(36,390)	(6,249)
State and local	(17)	3,305	(331)
Foreign	1,143	(657)	(10,728)
Total deferred	(4,345)	(33,742)	(17,308)
Total provision for income taxes	$ 118,366	$ 118,016	$ 97,403