CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Cumulative effect	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Treasury Stock at Cost	Retained Earnings (Deficit)	Retained Earnings (Deficit) Cumulative effect
Beginning balance at Dec. 31, 2019	$ 696,122	$ (440)	$ 205	$ 775,707	$ (58,616)	$ (107,984)	$ 86,810	$ (440)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(39,808)						(39,808)
Other comprehensive loss, net	(4,010)				(4,010)
Stock-based compensation and net issuance of common stock for share vesting	900			900
Common stock repurchases and related expenses	1,071					1,071
Ending balance at Mar. 31, 2020	653,835		205	776,607	(62,626)	(106,913)	46,562
Beginning balance at Dec. 31, 2020	200,102		206	779,424	(111,985)	(107,014)	(360,529)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(32,928)						(32,928)
Other comprehensive loss, net	1,484				1,484
Stock-based compensation and net issuance of common stock for share vesting	2,183		1	2,182
Common stock repurchases and related expenses	(680)					(680)
Ending balance at Mar. 31, 2021	$ 170,161		$ 207	$ 781,606	$ (110,501)	$ (107,694)	$ (393,457)