CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common stock Outstanding	Additional paid-in capital	Accumulated deficit	Accumulated other comprehensive (loss) income	Treasury stock
Beginning Balance (in shares) at Dec. 31, 2017		34,959
Beginning Balance at Dec. 31, 2017	$ 43,152	$ 34	$ 483,558	$ (443,419)	$ 10,709	$ (7,730)
Beginning Balance (in shares) at Dec. 31, 2017						3,800
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	10,721			10,721
Other comprehensive income, net of applicable tax	(10,524)				(10,524)
Purchase of restricted stock from employees (in shares)						34
Purchase of restricted stock from employees	(67)					$ (67)
Stock-based compensation (in shares)		453
Stock-based compensation and vesting of restricted stock units	696		696
Ending Balance (in shares) at Mar. 31, 2018		35,412
Ending Balance at Mar. 31, 2018	$ 43,978	$ 34	484,254	(432,698)	185	$ (7,797)
Ending Balance (in shares) at Mar. 31, 2018						3,834
Beginning Balance (in shares) at Dec. 31, 2018	31,905	36,135
Beginning Balance at Dec. 31, 2018	$ 40,487	$ 36	485,095	(435,552)	(606)	$ (8,486)
Beginning Balance (in shares) at Dec. 31, 2018	4,230					4,230
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	$ (1,902)			(1,902)
Other comprehensive income, net of applicable tax	65				65
Purchase of treasury stock (in shares)						2,575
Purchase of treasury stock	(3,982)					$ (3,982)
Purchase of restricted stock from employees (in shares)						23
Purchase of restricted stock from employees	(36)					$ (36)
Stock-based compensation (in shares)		82
Stock-based compensation and vesting of restricted stock units	$ 184		184
Ending Balance (in shares) at Mar. 31, 2019	29,389	36,217
Ending Balance at Mar. 31, 2019	$ 34,816	$ 36	$ 485,279	$ (437,454)	$ (541)	$ (12,504)
Ending Balance (in shares) at Mar. 31, 2019	6,828					6,828