Consolidated Statements of Stockholders' Deficit - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Common stock, shares, outstanding, beginning (in shares) at Dec. 31, 2018		17,644,000				7,341,000
Stockholders' equity balance, beginning of the period at Dec. 31, 2018	$ (202,273)	$ 250	$ 237,726	$ 10,414	$ (60)	$ (450,603)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	31,643			31,643
Other comprehensive loss	(1)				(1)
Purchase of Company common stock (in shares)		(151,000)				(151,000)
Purchase of Company common stock	(12,015)					$ (12,015)
Reissuance of treasury stock (in shares)		(168,000)				(168,000)
Reissuance of treasury stock	6,768		(667)			$ 7,435
Net issuance of shares for stock plans (in shares)		9,000
Net issuance of shares for stock plans	0
Repurchase of restricted shares for taxes (in shares)		19,000
Repurchase of restricted shares for taxes	(1,817)		(1,817)
Stock-based compensation	4,107		4,107
Dividends on common stock	(12,203)		(236)	(12,439)
Common stock, shares, outstanding, ending (in shares) at Mar. 31, 2019		17,651,000				7,324,000
Stockholders' equity balance, ending of the period at Mar. 31, 2019	$ (190,821)	$ 250	239,585	24,588	(61)	$ (455,183)
Common stock, shares, outstanding, beginning (in shares) at Dec. 31, 2019	16,521,921	16,522,000				8,404,000
Stockholders' equity balance, beginning of the period at Dec. 31, 2019	$ (241,774)	$ 249	246,192	61,653	(58)	$ (549,810)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	22,328			22,328
Purchase of Company common stock (in shares)		(460,000)				(460,000)
Purchase of Company common stock	$ (26,527)					$ (26,527)
Reissuance of treasury stock (in shares)	(367,200)	(367,000)				(368,000)
Reissuance of treasury stock	$ 20,524		3,967			$ 16,557
Net issuance of shares for stock plans (in shares)		18,000
Net issuance of shares for stock plans	0
Repurchase of restricted shares for taxes (in shares)		26,000
Repurchase of restricted shares for taxes	(2,000)		(2,000)
Stock-based compensation	4,038		4,038
Dividends on common stock	$ (12,469)		(246)	(12,715)
Common stock, shares, outstanding, ending (in shares) at Mar. 31, 2020	16,421,273	16,421,000				8,496,000
Stockholders' equity balance, ending of the period at Mar. 31, 2020	$ (236,377)	$ 249	$ 252,443	$ 70,769	$ (58)	$ (559,780)