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, 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
Beginning Balance at Dec. 31, 2024	2,311,271	$ 27	295,106	(7,981)	2,024,119
Beginning Balance, Shares at Dec. 31, 2024		26,599
Stock compensation, including options and long-term incentives	4,527		4,527
Exercise of stock options less shares withheld for taxes	2,463		2,463
Exercise of stock options less shares withheld for taxes, Shares		10
Shares issued for long-term incentive awards, net of shares withheld for taxes, Shares		25
Shares issued for long-term incentive awards, net of shares withheld for taxes	(7,644)		(7,644)
Purchase of shares by Deferred Compensation Trust			1,007	(1,007)
Net Income (Loss)	49,810				49,810
Ending Balance at Mar. 31, 2025	2,360,427	$ 27	295,459	(8,988)	2,073,929
Ending Balance, Shares at Mar. 31, 2025		26,634
Beginning Balance at Dec. 31, 2024	2,311,271	$ 27	295,106	(7,981)	2,024,119
Beginning Balance, Shares at Dec. 31, 2024		26,599
Net Income (Loss)	121,201
Ending Balance at Jun. 30, 2025	2,436,522	$ 27	300,593	(9,418)	2,145,320
Ending Balance, Shares at Jun. 30, 2025		26,636
Beginning Balance at Mar. 31, 2025	2,360,427	$ 27	295,459	(8,988)	2,073,929
Beginning Balance, Shares at Mar. 31, 2025		26,634
Stock compensation, including options and long-term incentives	3,727		3,727
Director deferred share activity , Shares		2
Director deferred share activity	1,077		1,077
Shares issued for long-term incentive awards, net of shares withheld for taxes	(100)		(100)
Purchase of shares by Deferred Compensation Trust			566	(566)
Sale of shares by Deferred Compensation Trust			(136)	136
Net Income (Loss)	71,391				71,391
Ending Balance at Jun. 30, 2025	$ 2,436,522	$ 27	$ 300,593	$ (9,418)	$ 2,145,320
Ending Balance, Shares at Jun. 30, 2025		26,636