CONSOLIDATED STATEMENT OF CHANGES IN EQUITY - USD ($) shares in Thousands, $ in Thousands		Total	Accumulated Deficit [Member]	AOCI Attributable to Parent [Member]	Common Stock	Additional Paid-in Capital [Member]	Treasury Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect adjustment	[1]	$ 0	$ (372)			$ 372
Balance at Dec. 31, 2015		195,505	(604,270)	$ (246)	$ 2,157	817,434	$ (19,570)
Balance (in shares) at Dec. 31, 2015					21,573
Balance (in shares) at Dec. 31, 2015							993
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		23,524	23,524
Stock Issued During Period, Value, Stock Options Exercised		(274)				(767)	$ 493
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period							(28)
Repurchase of common stock		(5,389)					$ (5,389)
Repurchase of common stock (in shares)							424
Issuance of restricted stock, net		7				(700)	$ 707
Issuance of restricted stock, net (in shares)							(38)
Stock-based compensation expense		1,275				1,275
Other comprehensive income		10		10
Balance at Jun. 30, 2016		$ 214,658	$ (581,118)	$ (236)	$ 2,157	$ 817,614	$ (23,759)
Balance (in shares) at Jun. 30, 2016					21,573
Balance (in shares) at Jun. 30, 2016							1,351

[1] Cumulative effect adjustment reflects adoption of ASU 2016-09 as of January 1, 2016.