Consolidated Statements of Stockholders' Deficit - USD ($) $ in Thousands	Total	Revision of Prior Period, Accounting Standards Update, Adjustment	Common Stock	Additional Paid-in Capital	(Accumulated Deficit) Retained Earnings	(Accumulated Deficit) Retained Earnings Revision of Prior Period, Accounting Standards Update, Adjustment	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)	$ (5,030)	$ 250	$ 237,726	$ 10,414	$ (5,030)	$ (60)	$ (450,603)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	53,033				53,033
Other comprehensive loss	1						1
Purchase of Company common stock (in shares)			543,000					(543,000)
Purchase of Company common stock	(47,356)							$ (47,356)
Reissuance of treasury stock (in shares)			187,000					(187,000)
Reissuance of treasury stock	6,938		$ (1)	(1,318)				$ 8,257
Net issuance of shares for stock plans (in shares)			(12,000)
Repurchase of restricted shares for taxes (in shares)			(24,000)
Repurchase of restricted shares for taxes	(2,242)			(2,242)
Stock-based compensation	5,894			5,894
Dividends on common stock	24,090			495	24,585
Common stock, shares, outstanding, ending (in shares) at Jun. 30, 2019			17,252,000					7,697,000
Stockholders' equity balance, ending of the period at Jun. 30, 2019	(215,125)		$ 249	240,555	33,832		(59)	$ (489,702)
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)	(5,030)	$ 250	237,726	10,414	(5,030)	(60)	$ (450,603)
Common stock, shares, outstanding, ending (in shares) at Dec. 31, 2019	16,521,921		16,522,000					8,404,000
Stockholders' equity balance, ending of the period at Dec. 31, 2019	$ (241,774)	(497)	$ 249	246,192	61,653	(497)	(58)	$ (549,810)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Common stock, shares, outstanding, beginning (in shares) at Mar. 31, 2019			17,651,000					7,324,000
Stockholders' equity balance, beginning of the period at Mar. 31, 2019	$ (190,821)		$ 250	239,585	24,588		(61)	$ (455,183)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	21,390				21,390
Other comprehensive loss	2						2
Purchase of Company common stock (in shares)			392,000					(392,000)
Purchase of Company common stock	(35,341)							$ (35,341)
Reissuance of treasury stock (in shares)			19,000					(19,000)
Reissuance of treasury stock	170		$ (1)	(651)				$ 822
Net issuance of shares for stock plans (in shares)			(21,000)
Repurchase of restricted shares for taxes (in shares)			(5,000)
Repurchase of restricted shares for taxes	(425)			(425)
Stock-based compensation	1,787			1,787
Dividends on common stock	11,887			259	12,146
Common stock, shares, outstanding, ending (in shares) at Jun. 30, 2019			17,252,000					7,697,000
Stockholders' equity balance, ending of the period at Jun. 30, 2019	$ (215,125)		$ 249	240,555	33,832		(59)	$ (489,702)
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)	$ (497)	$ 249	246,192	61,653	$ (497)	(58)	$ (549,810)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(112,451)				(112,451)
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)	(380,607)		381,000					(381,000)
Reissuance of treasury stock	$ 20,523		$ 0	3,367				$ 17,156
Net issuance of shares for stock plans (in shares)			4,000
Repurchase of restricted shares for taxes (in shares)			(29,000)
Repurchase of restricted shares for taxes	(2,129)			(2,129)
Stock-based compensation	6,670			6,670
Dividends on common stock	12,208			507	12,715
Other	$ (178)			(178)
Common stock, shares, outstanding, ending (in shares) at Jun. 30, 2020	16,417,618		16,418,000					8,483,000
Stockholders' equity balance, ending of the period at Jun. 30, 2020	$ (368,571)		$ 249	254,429	(64,010)		(58)	$ (559,181)
Common stock, shares, outstanding, beginning (in shares) at Mar. 31, 2020			16,421,000					8,496,000
Stockholders' equity balance, beginning of the period at Mar. 31, 2020	(236,377)		$ 249	252,443	70,769		(58)	$ (559,780)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(134,779)				(134,779)
Reissuance of treasury stock (in shares)			14,000					(13,000)
Reissuance of treasury stock	(1)		$ 0	(600)				$ 599
Net issuance of shares for stock plans (in shares)			(14,000)
Repurchase of restricted shares for taxes (in shares)			(3,000)
Repurchase of restricted shares for taxes	(129)			(129)
Stock-based compensation	2,632			2,632
Dividends on common stock	261			261
Other	$ (178)			(178)
Common stock, shares, outstanding, ending (in shares) at Jun. 30, 2020	16,417,618		16,418,000					8,483,000
Stockholders' equity balance, ending of the period at Jun. 30, 2020	$ (368,571)		$ 249	$ 254,429	$ (64,010)		$ (58)	$ (559,181)