Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at at Dec. 31, 2020	$ 855,497	$ 596	$ 855,547	$ 78,010	$ (78,656)
Balance at (in shares) at Dec. 31, 2020		59,560,036
Stock-based compensation plans
Grant of restricted stock	0	$ 1	(1)
Grant of restricted stock (in shares)		122,100
Issuance of common shares, net of withholdings	(1,197)	$ 0	(1,197)
Withholdings of common shares, net of issuances (in shares)		93,752
Stock Issued During Period, Value, Conversion of Convertible Securities	0	$ 9	(9)
Stock Issued During Period, Shares, Conversion of Convertible Securities		865,548
Amortization of stock awards and restricted stock	1,750		1,750
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	43,688			42,290	1,398
Balance at at Mar. 31, 2021	899,738	$ 606	856,090	120,300	(77,258)
Balance at (in shares) at Mar. 31, 2021		60,641,436
Balance at at Dec. 31, 2021	$ 1,322,377	$ 741	1,074,286	309,430	(62,080)
Balance at (in shares) at Dec. 31, 2021	74,142,183	74,142,183
Stock-based compensation plans
Grant of restricted stock	$ 0	$ 1	(1)
Grant of restricted stock (in shares)		110,400
Issuance of common shares, net of withholdings	(1,350)	$ 1	(1,351)
Withholdings of common shares, net of issuances (in shares)		85,343
Conversion of warrants	0	$ 0	0
Forfeited restricted stock (in shares)		(700)
Amortization of stock awards and restricted stock	1,654		1,654
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	50,047				251
Balance at at Mar. 31, 2022	$ 1,354,040	$ 743	1,035,029	380,097	$ (61,829)
Balance at (in shares) at Mar. 31, 2022	74,337,226	74,337,226
Stock-based compensation plans
Retained earnings | Accounting Standards Update 2020-06	$ (18,688)		$ (39,559)	$ 20,871