Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Earnings Per Share
Net (loss) income for basic and diluted (loss) income per share	$ (5,217)	$ (10,210)	$ (7,723)	$ 6,523
Shares of common stock and common stock equivalents:
Average common shares used in basic computation	33,189,000	34,076,000	33,147,000	34,172,000
Effect of dilutive securities (in shares)				1,157,000
Average common shares used in diluted computation	33,189,000	34,076,000	33,147,000	35,329,000
(Loss) income per share:
Basic (in dollars per share)	$ (0.16)	$ (0.30)	$ (0.23)	$ 0.19
Diluted (in dollars per share)	$ (0.16)	$ (0.30)	$ (0.23)	$ 0.18
Anti-dilutive equity awards not included in the detailed earnings per share computation
Equity awards not included in the diluted earnings per share computation	0	0	0	7,000