Income Taxes (Provision for (Benefit From) Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current
Federal	$ 1,096	$ 497	$ (413)
State	2,776	2,179	2,164
Foreign	1,761	711	877
Total income taxes, current	5,633	3,387	2,628
Deferred
Federal	8,247	12,993	14,110
State	488	1,729	495
Foreign	(475)	(112)	(225)
Total income taxes, deferred	8,260	14,610	14,380
Total income tax provision	$ 13,893	$ 17,997	$ 17,008