Unaudited Condensed Consolidated Statement of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock ($.001 Par Value)	Paid-In Capital in Excess of Par	Retained Earnings	Treasury Stock (at cost)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)					0
Beginning balance (in shares) at Dec. 31, 2021		50,193,656
Beginning balance at Dec. 31, 2021	$ 1,135,390	$ 50	$ 1,129,996	$ 5,344	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issued pursuant to stock compensation plans (in shares)		141,581
Stock-based compensation	3,142		3,142
Tax withholding for stock compensation plans	(58)		(58)
Issued pursuant to exercise of warrants (in shares)		14,153
Issued pursuant to exercise of warrants	47		47
Net income(loss)	(872)			(872)
Ending balance (in shares) at Mar. 31, 2022		50,349,390
Ending balance (in shares) at Mar. 31, 2022					0
Ending balance at Mar. 31, 2022	1,137,649	$ 50	1,133,127	4,472	$ 0
Beginning balance (in shares) at Dec. 31, 2021		50,193,656
Beginning balance at Dec. 31, 2021	1,135,390	$ 50	1,129,996	5,344	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income(loss)	405,045
Ending balance (in shares) at Sep. 30, 2022		49,793,270
Ending balance (in shares) at Sep. 30, 2022					0
Ending balance at Sep. 30, 2022	1,452,877	$ 50	1,042,438	410,389	$ 0
Beginning balance (in shares) at Dec. 31, 2021		50,193,656
Beginning balance at Dec. 31, 2021	$ 1,135,390	$ 50	1,129,996	5,344	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Retired treasury shares (in shares)	(1,600,000)
Retired treasury shares	$ (100,000)
Ending balance (in shares) at Dec. 31, 2022	49,814,874	49,814,874
Ending balance (in shares) at Dec. 31, 2022					0
Ending balance at Dec. 31, 2022	$ 1,532,617	$ 50	1,047,063	485,504	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)					0
Beginning balance (in shares) at Mar. 31, 2022		50,349,390
Beginning balance at Mar. 31, 2022	1,137,649	$ 50	1,133,127	4,472	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Forfeited pursuant to stock compensation plans (in shares)		(3,264)
Stock-based compensation	4,400		4,400
Tax withholding for stock compensation plans	(5)		(5)
Issued pursuant to exercise of warrants (in shares)		987,411
Issued pursuant to exercise of warrants	54	$ 1	53
Stock repurchase program (in shares)		(457,549)			(457,549)
Stock repurchase program	(28,751)				$ (28,751)
Net income(loss)	155,494			155,494
Ending balance (in shares) at Jun. 30, 2022		50,875,988
Ending balance (in shares) at Jun. 30, 2022					457,549
Ending balance at Jun. 30, 2022	1,268,841	$ 51	1,137,575	159,966	$ (28,751)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)					457,549
Stock-based compensation	4,691		4,691
Retired treasury shares (in shares)					(1,615,391)
Retired treasury shares		$ (1)	(100,029)		$ 100,030
Tax withholding for stock compensation plans (in shares)		(35)			(35)
Tax withholding for stock compensation plans	(2)				$ (2)
Issued pursuant to exercise of warrants (in shares)		71,440
Issued pursuant to exercise of warrants	201		201
Stock repurchase program (in shares)		(1,157,807)			(1,157,807)
Stock repurchase program	(71,277)				$ (71,277)
Net issued pursuant to stock compensation plans (in shares)		3,684
Net income(loss)	250,423			250,423
Ending balance (in shares) at Sep. 30, 2022		49,793,270
Ending balance (in shares) at Sep. 30, 2022					0
Ending balance at Sep. 30, 2022	$ 1,452,877	$ 50	1,042,438	410,389	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)					0
Beginning balance (in shares)					0
Beginning balance (in shares) at Dec. 31, 2022	49,814,874	49,814,874
Beginning balance at Dec. 31, 2022	$ 1,532,617	$ 50	1,047,063	485,504	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issued pursuant to stock compensation plans (in shares)		268,748
Stock-based compensation	5,320		5,320
Tax withholding for stock compensation plans (in shares)		(16,281)
Tax withholding for stock compensation plans	(2,683)		(2,683)
Issued pursuant to exercise of warrants (in shares)		209,185
Issued pursuant to exercise of warrants	130		130
Net income(loss)	89,199			89,199
Ending balance (in shares) at Mar. 31, 2023		50,276,526
Ending balance (in shares) at Mar. 31, 2023					0
Ending balance at Mar. 31, 2023	$ 1,624,583	$ 50	1,049,830	574,703	$ 0
Beginning balance (in shares) at Dec. 31, 2022	49,814,874	49,814,874
Beginning balance at Dec. 31, 2022	$ 1,532,617	$ 50	1,047,063	485,504	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Retired treasury shares (in shares)	(16,281)
Retired treasury shares	$ (1,400)
Net income(loss)	$ 153,587
Ending balance (in shares) at Sep. 30, 2023	51,446,811	51,446,811
Ending balance (in shares) at Sep. 30, 2023					0
Ending balance at Sep. 30, 2023	$ 1,715,774	$ 51	1,076,632	639,091	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)					0
Beginning balance (in shares) at Mar. 31, 2023		50,276,526
Beginning balance at Mar. 31, 2023	1,624,583	$ 50	1,049,830	574,703	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Forfeited pursuant to stock compensation plans (in shares)		(1,013)
Stock-based compensation	7,246		7,246
Issued pursuant to exercise of warrants (in shares)		186,373
Issued pursuant to exercise of warrants	228		228
Employee stock purchase plan (in shares)		11,115
Employee stock purchase plan	815		815
Net income(loss)	67,281			67,281
Ending balance (in shares) at Jun. 30, 2023		50,473,001
Ending balance (in shares) at Jun. 30, 2023					0
Ending balance at Jun. 30, 2023	1,700,153	$ 50	1,058,119	641,984	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)					0
Forfeited pursuant to stock compensation plans (in shares)		(1,211)
Stock-based compensation	7,359		7,359
Issued pursuant to exercise of warrants (in shares)		975,021
Issued pursuant to exercise of warrants	11,155	$ 1	11,154
Net income(loss)	$ (2,893)			(2,893)
Ending balance (in shares) at Sep. 30, 2023	51,446,811	51,446,811
Ending balance (in shares) at Sep. 30, 2023					0
Ending balance at Sep. 30, 2023	$ 1,715,774	$ 51	$ 1,076,632	$ 639,091	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)					0