CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Treasury Stock [Member]	Capital in Excess of Par Value [Member]	Retained Earnings (Accumulated Deficit) [Member]
Balance at Dec. 31, 2021	$ 460,490	$ 9,117	$ (10,533)	$ 493,161	$ (31,255)
Balance, shares at Dec. 31, 2021		91,168	(1,375)
Net income	58,766				58,766
Stock-based compensation	803			803
Other	(1,871)		$ (1,871)
Other, Shares			(229)
Balance at Mar. 31, 2022	518,188	$ 9,117	$ (12,404)	493,964	27,511
Balance, shares at Mar. 31, 2022		91,168	(1,604)
Balance at Dec. 31, 2021	460,490	$ 9,117	$ (10,533)	493,161	(31,255)
Balance, shares at Dec. 31, 2021		91,168	(1,375)
Net income	164,477
Balance at Sep. 30, 2022	526,144	$ 9,117	$ (112,446)	496,251	133,222
Balance, shares at Sep. 30, 2022		91,168	(9,171)
Balance at Mar. 31, 2022	518,188	$ 9,117	$ (12,404)	493,964	27,511
Balance, shares at Mar. 31, 2022		91,168	(1,604)
Net income	103,399				103,399
Stock-based compensation	1,366			1,366
Purchase of common stock	(13,394)		$ (13,394)
Purchase of common stock, Shares			(713)
Balance at Jun. 30, 2022	609,559	$ 9,117	$ (25,798)	495,330	130,910
Balance, shares at Jun. 30, 2022		91,168	(2,317)
Net income	2,312				2,312
Stock-based compensation	921			921
Purchase of common stock	(86,648)		$ (86,648)
Purchase of common stock, Shares			(6,854)
Balance at Sep. 30, 2022	526,144	$ 9,117	$ (112,446)	496,251	133,222
Balance, shares at Sep. 30, 2022		91,168	(9,171)
Balance at Dec. 31, 2022	515,873	$ 9,117	$ (189,515)	497,179	199,092
Balance, shares at Dec. 31, 2022		91,168	(14,888)
Net income	15,901				15,901
Stock-based compensation	719			719
Shares issued restricted stock units			$ 682	(682)
Shares issued restricted stock units, shares			53
Shares withheld restricted stock and restricted stock units vesting	(2,541)		$ (2,541)
Shares withheld restricted stock and restricted stock units vesting, shares			(204)
Balance at Mar. 31, 2023	529,952	$ 9,117	$ (191,374)	497,216	214,993
Balance, shares at Mar. 31, 2023		91,168	(15,039)
Balance at Dec. 31, 2022	515,873	$ 9,117	$ (189,515)	497,179	199,092
Balance, shares at Dec. 31, 2022		91,168	(14,888)
Net income	33,270
Balance at Sep. 30, 2023	532,744	$ 9,117	$ (208,263)	499,528	232,362
Balance, shares at Sep. 30, 2023		91,168	(16,824)
Balance at Mar. 31, 2023	529,952	$ 9,117	$ (191,374)	497,216	214,993
Balance, shares at Mar. 31, 2023		91,168	(15,039)
Net income	25,095				25,095
Stock-based compensation	1,927			1,927
Purchase of common stock	(17,218)		$ (17,218)
Purchase of common stock, Shares			(1,795)
Shares issued restricted stock units and ESPP participants	106		$ 732	(626)
Shares issued restricted stock units and ESPP participants, shares			58
Shares withheld restricted stock units vesting	(65)		$ (65)
Shares withheld restricted stock units vesting, shares			(7)
Balance at Jun. 30, 2023	539,797	$ 9,117	$ (207,925)	498,517	240,088
Balance, shares at Jun. 30, 2023		91,168	(16,783)
Net income	(7,726)				(7,726)
Stock-based compensation	1,318			1,318
Purchase of common stock	(586)		$ (586)
Purchase of common stock, Shares		(60)	(60)
Shares issued restricted stock units			$ 307	(307)
Shares issued restricted stock units, shares			25
Shares withheld restricted stock units vesting	(59)		$ (59)
Shares withheld restricted stock units vesting, shares			(6)
Balance at Sep. 30, 2023	$ 532,744	$ 9,117	$ (208,263)	$ 499,528	$ 232,362
Balance, shares at Sep. 30, 2023		91,168	(16,824)