Income Taxes (Income Before Income Taxes and Provision for Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income (loss) before income tax provision (benefit)
Domestic	$ 31,454	$ (4,251)	$ (4,894)
Foreign	(2,352)	(2,442)	(2,343)
Income (loss) from continuing operations before income tax provision (benefit)	29,102	(6,693)	(7,237)
Current income tax provision (benefit):
Federal	(3,885)	(20,847)	(4,526)
State	435	288	278
Total current	(3,450)	(20,559)	(4,248)
Deferred income tax provision (benefit):
Federal	6,588	10,935	(6,230)
State	(2,499)	(25)	968
Total deferred	4,089	10,910	(5,262)
Income tax provision (benefit)	$ 639	$ (9,649)	$ (9,510)