Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in-Capital	Treasury Stock	Accumulated Other Comprehensive Loss	Retained Earnings
Beginning balance (in shares) at Dec. 31, 2016		63,391,000		9,303,000
Beginning balance at Dec. 31, 2016	$ 262,161	$ 6	$ 224,480	$ (49,458)	$ (20,949)	$ 108,082
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	15,869					15,869
Total other comprehensive income, net of tax	1,720				1,720
Issuance of common stock upon exercise of stock awards (in shares)		648,000
Issuance of common stock upon exercise of stock awards	1,421		1,421
Issuance of treasury shares as consideration for acquisition (in shares)		36,000		405,000
Issuance of treasury shares as consideration for acquisition	4,677		385	$ 4,561		(269)
Acquisition of treasury shares (in shares)				1,122,000
Acquisition of treasury shares	(10,976)			$ (10,976)
Stock based compensation expense	6,820		6,820
Cumulative effect of pre-2017 revision adjustments	(1,060)					(1,060)
Ending balance (in shares) at Dec. 31, 2017		64,075,000		10,020,000
Ending balance at Dec. 31, 2017	282,923	$ 6	235,199	$ (55,873)	(19,229)	122,820
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(1,874)
Ending balance at Mar. 31, 2018	277,842
Beginning balance (in shares) at Dec. 31, 2017		64,075,000		10,020,000
Beginning balance at Dec. 31, 2017	282,923	$ 6	235,199	$ (55,873)	(19,229)	122,820
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(2,173)
Ending balance at Jun. 30, 2018	255,977
Beginning balance (in shares) at Dec. 31, 2017		64,075,000		10,020,000
Beginning balance at Dec. 31, 2017	282,923	$ 6	235,199	$ (55,873)	(19,229)	122,820
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(47,293)
Ending balance at Sep. 30, 2018	209,900
Beginning balance (in shares) at Dec. 31, 2017		64,075,000		10,020,000
Beginning balance at Dec. 31, 2017	282,923	$ 6	235,199	$ (55,873)	(19,229)	122,820
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(76,683)					(76,683)
Total other comprehensive income, net of tax	(5,082)				(5,082)
Issuance of common stock upon exercise of stock awards (in shares)		420,000
Issuance of common stock upon exercise of stock awards	$ (541)		(541)
Acquisition of treasury shares (in shares)	2,667,732			2,668,000
Acquisition of treasury shares	$ (25,598)			$ (25,598)
Stock based compensation expense	5,302		5,302
Ending balance (in shares) at Dec. 31, 2018		64,495,000		12,688,000
Ending balance at Dec. 31, 2018	180,955	$ 6	239,960	$ (81,471)	(24,311)	46,771
Beginning balance at Mar. 31, 2018	277,842
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(299)
Ending balance at Jun. 30, 2018	255,977
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(45,120)
Ending balance at Sep. 30, 2018	209,900
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(29,390)
Ending balance (in shares) at Dec. 31, 2018		64,495,000		12,688,000
Ending balance at Dec. 31, 2018	180,955	$ 6	239,960	$ (81,471)	(24,311)	46,771
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(2,044)
Ending balance at Mar. 31, 2019	180,577
Beginning balance (in shares) at Dec. 31, 2018		64,495,000		12,688,000
Beginning balance at Dec. 31, 2018	180,955	$ 6	239,960	$ (81,471)	(24,311)	46,771
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(2,552)
Ending balance at Jun. 30, 2019	181,608
Beginning balance (in shares) at Dec. 31, 2018		64,495,000		12,688,000
Beginning balance at Dec. 31, 2018	180,955	$ 6	239,960	$ (81,471)	(24,311)	46,771
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(3,614)
Ending balance at Sep. 30, 2019	180,493
Beginning balance (in shares) at Dec. 31, 2018		64,495,000		12,688,000
Beginning balance at Dec. 31, 2018	180,955	$ 6	239,960	$ (81,471)	(24,311)	46,771
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(10,075)					(10,075)
Total other comprehensive income, net of tax	$ 1,862				1,862
Issuance of common stock upon exercise of stock awards (in shares)	27,000	325,000
Issuance of common stock upon exercise of stock awards	$ (182)		(182)
Stock based compensation expense	5,533		5,533
Ending balance (in shares) at Dec. 31, 2019		64,820,000		12,688,000
Ending balance at Dec. 31, 2019	178,252	$ 6	245,311	$ (81,471)	(22,449)	36,855
Beginning balance at Mar. 31, 2019	180,577
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(508)
Ending balance at Jun. 30, 2019	181,608
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(1,062)
Ending balance at Sep. 30, 2019	180,493
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(6,461)
Ending balance (in shares) at Dec. 31, 2019		64,820,000		12,688,000
Ending balance at Dec. 31, 2019	$ 178,252	$ 6	$ 245,311	$ (81,471)	$ (22,449)	$ 36,855