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 [Member]
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
Vesting of equity compensation			$ 682	(682)
Vesting of equity compensation, shares			53
Shares withheld upon vesting of equity compensation	(2,541)		$ (2,541)
Shares withheld upon vesting of equity compensation, 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	40,996
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)
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)
Balance at Dec. 31, 2023	518,331	$ 9,117	$ (218,827)	501,026	227,015
Balance, shares at Dec. 31, 2023		91,168	(18,051)
Net income	5,623				5,623
Stock-based compensation	1,394			1,394
Purchase of common stock	(5,397)		$ (5,397)
Purchase of common stock, Shares			(690)
Vesting of equity compensation			$ 1,323	(1,323)
Vesting of equity compensation, shares			109
Shares withheld upon vesting of equity compensation	(1,766)		$ (1,766)
Shares withheld upon vesting of equity compensation, shares			(231)
Balance at Mar. 31, 2024	518,185	$ 9,117	$ (224,667)	501,097	232,638
Balance, shares at Mar. 31, 2024		91,168	(18,863)
Balance at Dec. 31, 2023	518,331	$ 9,117	$ (218,827)	501,026	227,015
Balance, shares at Dec. 31, 2023		91,168	(18,051)
Net income	15,178
Purchase of common stock		$ (12,100)
Purchase of common stock, Shares		(1,500)
Balance at Jun. 30, 2024	522,793	$ 9,117	$ (229,939)	501,422	242,193
Balance, shares at Jun. 30, 2024		91,168	(19,547)
Balance at Mar. 31, 2024	518,185	$ 9,117	$ (224,667)	501,097	232,638
Balance, shares at Mar. 31, 2024		91,168	(18,863)
Net income	9,555				9,555
Stock-based compensation	2,099			2,099
Purchase of common stock	(6,734)	$ (6,700)	$ (6,734)
Purchase of common stock, Shares		(800)	(802)
Shares issued restricted stock units and ESPP participants	98		$ 429	(331)
Shares issued restricted stock units and ESPP participants, shares			37
Vesting of equity compensation			$ 1,443	(1,443)
Vesting of equity compensation, shares			123
Shares withheld restricted stock units vesting	(410)		$ (410)
Shares withheld restricted stock units vesting, shares			(42)
Balance at Jun. 30, 2024	$ 522,793	$ 9,117	$ (229,939)	$ 501,422	$ 242,193
Balance, shares at Jun. 30, 2024		91,168	(19,547)