Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Deferred Compensation Trust [Member]	Retained Earnings [Member]
Beginning Balance at Dec. 31, 2022	$ 1,579,341	$ 26	$ 277,366	$ (5,248)	$ 1,307,197
Beginning Balance, Shares at Dec. 31, 2022		26,464
Stock compensation, including options and long-term incentives	2,225		2,225
Exercise of stock options less shares withheld for taxes	2,204		2,204
Exercise of stock options less shares withheld for taxes, Shares		21
Shares issued for long-term incentive awards, net of shares withheld for taxes, Shares		48
Shares issued for long-term incentive awards, net of shares withheld for taxes	(8,927)	$ 1	(8,928)
Purchase of shares by Deferred Compensation Trust			474	(474)
Sale of shares by Deferred Compensation Trust			(67)	67
Net Income (Loss)	76,097				76,097
Ending Balance at Mar. 31, 2023	1,650,940	$ 27	273,274	(5,655)	1,383,294
Ending Balance, Shares at Mar. 31, 2023		26,533
Beginning Balance at Dec. 31, 2022	1,579,341	$ 26	277,366	(5,248)	1,307,197
Beginning Balance, Shares at Dec. 31, 2022		26,464
Net Income (Loss)	167,416
Ending Balance at Jun. 30, 2023	1,746,222	$ 27	277,208	(5,626)	1,474,613
Ending Balance, Shares at Jun. 30, 2023		26,535
Beginning Balance at Mar. 31, 2023	1,650,940	$ 27	273,274	(5,655)	1,383,294
Beginning Balance, Shares at Mar. 31, 2023		26,533
Stock compensation, including options and long-term incentives	2,500		2,500
Director deferred share activity , Shares		2
Director deferred share activity	1,417		1,417
Exercise of stock options less shares withheld for taxes	46		46
Sale of shares by Deferred Compensation Trust			(29)	29
Net Income (Loss)	91,319				91,319
Ending Balance at Jun. 30, 2023	1,746,222	$ 27	277,208	(5,626)	1,474,613
Ending Balance, Shares at Jun. 30, 2023		26,535
Beginning Balance at Dec. 31, 2023	1,941,494	$ 27	285,092	(5,679)	1,662,054
Beginning Balance, Shares at Dec. 31, 2023		26,549
Stock compensation, including options and long-term incentives	2,724		2,724
Exercise of stock options less shares withheld for taxes	1,993		1,993
Exercise of stock options less shares withheld for taxes, Shares		17
Shares issued for long-term incentive awards, net of shares withheld for taxes, Shares		22
Shares issued for long-term incentive awards, net of shares withheld for taxes	(7,968)		(7,968)
Purchase of shares by Deferred Compensation Trust			314	(314)
Sale of shares by Deferred Compensation Trust			(65)	65
Net Income (Loss)	90,695				90,695
Ending Balance at Mar. 31, 2024	2,028,938	$ 27	282,090	(5,928)	1,752,749
Ending Balance, Shares at Mar. 31, 2024		26,588
Beginning Balance at Dec. 31, 2023	1,941,494	$ 27	285,092	(5,679)	1,662,054
Beginning Balance, Shares at Dec. 31, 2023		26,549
Net Income (Loss)	193,214
Ending Balance at Jun. 30, 2024	2,136,086	$ 27	287,611	(6,820)	1,855,268
Ending Balance, Shares at Jun. 30, 2024		26,590
Beginning Balance at Mar. 31, 2024	2,028,938	$ 27	282,090	(5,928)	1,752,749
Beginning Balance, Shares at Mar. 31, 2024		26,588
Stock compensation, including options and long-term incentives	3,207		3,207
Director deferred share activity , Shares		2
Director deferred share activity	1,422		1,422
Purchase of shares by Deferred Compensation Trust			931	(931)
Sale of shares by Deferred Compensation Trust			(39)	39
Net Income (Loss)	102,519				102,519
Ending Balance at Jun. 30, 2024	$ 2,136,086	$ 27	$ 287,611	$ (6,820)	$ 1,855,268
Ending Balance, Shares at Jun. 30, 2024		26,590