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
Withholdings of common shares, net of issuances	(1,236)	$ 1	(1,237)
Withholdings of common shares, net of issuances (in shares)		92,234
Stock Issued During Period, Value, Conversion of Convertible Securities	131,967	$ 144	131,823
Stock Issued During Period, Shares, Conversion of Convertible Securities		14,428,445
Amortization of stock awards and restricted stock	3,479		3,479
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	125,020			122,224	2,796
Balance at at Jun. 30, 2021	1,114,727	$ 742	989,611	200,234	(75,860)
Balance at (in shares) at Jun. 30, 2021		74,202,815
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
Stock-based compensation plans
Grant of restricted stock	0	$ 0	0
Grant of restricted stock (in shares)		0
Withholdings of common shares, net of issuances	(39)	$ 0	(39)
Withholdings of common shares, net of issuances (in shares)		(1,518)
Stock Issued During Period, Value, Conversion of Convertible Securities	131,967	$ 136	131,831
Stock Issued During Period, Shares, Conversion of Convertible Securities		13,562,897
Amortization of stock awards and restricted stock	1,729		1,729
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	81,332			79,934	1,398
Balance at at Jun. 30, 2021	1,114,727	$ 742	989,611	200,234	(75,860)
Balance at (in shares) at Jun. 30, 2021		74,202,815
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)		109,200
Withholdings of common shares, net of issuances	(1,439)	$ 2	(1,441)
Withholdings of common shares, net of issuances (in shares)		122,255
Conversion of warrants	0	$ 0	0
Forfeited restricted stock (in shares)		(4,500)
Amortization of stock awards and restricted stock	3,854		3,854
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	105,389			104,888	501
Balance at at Jun. 30, 2022	$ 1,411,493	$ 744	1,037,139	435,189	(61,579)
Balance at (in shares) at Jun. 30, 2022	74,369,138	74,369,138
Stock-based compensation plans
Retained earnings | Accounting Standards Update 2020-06	$ (18,688)		(39,559)	20,871
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
Stock-based compensation plans
Grant of restricted stock	0	$ 0	0
Grant of restricted stock (in shares)		(1,200)
Withholdings of common shares, net of issuances	(89)	$ 1	(90)
Withholdings of common shares, net of issuances (in shares)		36,912
Conversion of warrants	0	$ 0	0
Forfeited restricted stock (in shares)		(3,800)
Amortization of stock awards and restricted stock	2,200		2,200
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	55,342			55,092	250
Balance at at Jun. 30, 2022	$ 1,411,493	$ 744	1,037,139	435,189	$ (61,579)
Balance at (in shares) at Jun. 30, 2022	74,369,138	74,369,138
Stock-based compensation plans
Retained earnings | Accounting Standards Update 2020-06	$ 0		$ 0	$ 0