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 loss		(561)	(561)
Stock Issued During Period, Value, Stock Options Exercised		(318)				(1,117)	$ 799
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period							(46)
Repurchase of common stock		(5,389)					$ (5,389)
Repurchase of common stock (in shares)							424
Issuance of restricted stock, net of tax withholdings		12				(681)	$ 693
Issuance of restricted stock, net (in shares)							(36)
Stock-based compensation expense		1,879				1,879
Other comprehensive income		13		13
Balance at Sep. 30, 2016		$ 191,141	$ (605,203)	$ (233)	$ 2,157	$ 817,887	$ (23,467)
Balance (in shares) at Sep. 30, 2016					21,573
Balance (in shares) at Sep. 30, 2016							1,335

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