Income Taxes (Components of Income Tax Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current Income Tax Expense (Benefit) [Abstract]
Federal	$ 1,259	$ 1,267	$ 13,504
State	310	191	270
Foreign	3,266	4,789	32
Current income tax provision	4,835	6,247	13,806
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Federal	78	808	308
State	295	720	43
Foreign	(3,571)	(669)	(263)
Deferred income tax provision	(3,198)	859	88
Total provision for income taxes	$ 1,637	$ 7,106	$ 13,894