Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Impact of Adoption	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Impact of Adoption	Accumulated (Deficit)
Beginning balance (in shares) at Dec. 31, 2020			59,590,422		(26,678,410)
Beginning balance at Dec. 31, 2020	$ 196,775	$ (2,967)	$ 596	$ 1,059,624	$ (468,613)	$ 0	$ (2,967)	$ (394,832)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)			(215,544)
Exercise of stock options	3,094		$ (2)	3,096
Exercise of stock warrants (in shares)			111
Exercise of stock warrants	5			5
Stock compensation expense	1,971			1,971
Net income	36,506							36,506
Ending balance (in shares) at Mar. 31, 2021			59,806,077		(26,678,410)
Ending balance at Mar. 31, 2021	229,196		$ 598	1,058,504	$ (468,613)	(2,967)		(358,326)
Beginning balance (in shares) at Dec. 31, 2021			60,830,853		(26,685,542)
Beginning balance at Dec. 31, 2021	314,715	$ 5,448	$ 608	1,084,288	$ (468,879)	(8,047)	$ 5,448	(293,255)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)			(82,810)
Exercise of stock options	(839)		$ (1)	(838)
Stock compensation expense	1,928			1,928
Net income	33,511							33,511
Ending balance (in shares) at Mar. 31, 2022			60,913,663		(26,685,542)
Ending balance at Mar. 31, 2022	$ 356,441		$ 609	$ 1,087,054	$ (468,879)	$ (2,599)		$ (259,744)