CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Accumulated Deficit [Member]	AOCI Attributable to Parent [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]
Beginning Balance at Dec. 31, 2017	$ 81,796	$ (715,476)	$ (113)	$ 2,157	$ 812,536	$ (17,308)
Beginning Balance (in shares) at Dec. 31, 2017				21,573		999
Net loss	(15,629)	(15,629)
Stock options exercised, net of tax withholdings	0				(16)	$ 16
Restricted stock awards, forfeitures and shares repurchased for tax withholdings, net	(267)				(2,558)	$ 2,291
Issuance of restricted stock, net of tax withholdings (in shares)						85
Stock-based compensation	966				966
Other comprehensive loss	113		113
Ending Balance at Dec. 31, 2018	66,979	(731,105)	0	$ 2,157	810,928	$ (15,001)
Ending Balance (in shares) at Dec. 31, 2018				21,573		914
Net loss	54,561	54,561
Restricted stock awards, forfeitures and shares repurchased for tax withholdings, net	(236)				(1,213)	$ 977
Issuance of restricted stock, net of tax withholdings (in shares)						16
Stock-based compensation	1,141				1,141
Other comprehensive loss	(25)		(25)
Dividends	(20,679)	(20,679)
Ending Balance at Dec. 31, 2019	$ 101,741	$ (697,223)	$ (25)	$ 2,157	$ 810,856	$ (14,024)
Ending Balance (in shares) at Dec. 31, 2019				21,573		930