Income Taxes - Components Of Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Taxes
U.S. federal, Current	$ 8,005	$ 19,590	$ 19,033
State and local, Current	4,386	4,495	3,554
Foreign, Current	4,345	4,264	2,549
Total current	16,736	28,349	25,136
U.S. federal, Deferred	9,857	6,890	1,639
State and local, Deferred	1,966	1,226	795
Foreign, Deferred	(1,937)	2,877	604
Deferred Income Tax Expense (Benefit), Total	9,886	10,993	3,038
Total income tax (benefit) expense	$ 26,622	$ 39,342	$ 28,174