Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2022	$ 803,945	$ 110,080	$ 693,943	$ (78)
Balance, Shares at Dec. 31, 2022		24,388,000
Net income	71,657		71,657
Share-based compensation	1,493	$ 1,493
Common stock issued under stock plans, net of shares withheld for employee taxes, Shares		78,000
Taxes paid related to net share settlement of stock awards	(6,086)	$ (6,086)
Dividends accrued per share	(11,453)		(11,453)
Other comprehensive income (loss)	(18)			(18)
Balance at Mar. 31, 2023	859,538	$ 105,487	754,147	(96)
Balance, Shares at Mar. 31, 2023		24,466,000
Balance at Dec. 31, 2022	803,945	$ 110,080	693,943	(78)
Balance, Shares at Dec. 31, 2022		24,388,000
Net income	142,605
Balance at Sep. 30, 2023	911,372	$ 109,253	802,161	(42)
Balance, Shares at Sep. 30, 2023		24,489,000
Balance at Mar. 31, 2023	859,538	$ 105,487	754,147	(96)
Balance, Shares at Mar. 31, 2023		24,466,000
Net income	30,582		30,582
Share-based compensation	1,889	$ 1,889
Common stock issued under stock plans, net of shares withheld for employee taxes, Shares		19,000
Taxes paid related to net share settlement of stock awards	(14)	$ (14)
Dividends accrued per share	(11,469)		(11,469)
Other comprehensive income (loss)	43			43
Balance at Jun. 30, 2023	880,569	$ 107,362	773,260	(53)
Balance, Shares at Jun. 30, 2023		24,485,000
Net income	40,366		40,366
Share-based compensation	1,891	$ 1,891
Common stock issued under stock plans, net of shares withheld for employee taxes, Shares		4,000
Dividends accrued per share	(11,465)		(11,465)
Other comprehensive income (loss)	11			11
Balance at Sep. 30, 2023	911,372	$ 109,253	802,161	(42)
Balance, Shares at Sep. 30, 2023		24,489,000
Balance at Dec. 31, 2023	$ 933,802	$ 111,122	822,796	(116)
Balance, Shares at Dec. 31, 2023	24,496,000	24,496,000
Net income	$ 22,848		22,848
Share-based compensation	2,209	$ 2,209
Common stock issued under stock plans, net of shares withheld for employee taxes, Shares		45,000
Taxes paid related to net share settlement of stock awards	(4,082)	$ (4,082)
Dividends accrued per share	(11,824)		(11,824)
Other comprehensive income (loss)	67			67
Balance at Mar. 31, 2024	943,020	$ 109,249	833,820	(49)
Balance, Shares at Mar. 31, 2024		24,541,000
Balance at Dec. 31, 2023	$ 933,802	$ 111,122	822,796	(116)
Balance, Shares at Dec. 31, 2023	24,496,000	24,496,000
Net income	$ 192,778
Balance at Sep. 30, 2024	$ 1,094,060	$ 113,989	980,244	(173)
Balance, Shares at Sep. 30, 2024	24,551,000	24,551,000
Balance at Mar. 31, 2024	$ 943,020	$ 109,249	833,820	(49)
Balance, Shares at Mar. 31, 2024		24,541,000
Net income	20,618		20,618
Share-based compensation	2,347	$ 2,347
Common stock issued under stock plans, net of shares withheld for employee taxes, Shares		9,000
Dividends accrued per share	(11,763)		(11,763)
Other comprehensive income (loss)	11			11
Balance at Jun. 30, 2024	954,233	$ 111,596	842,675	(38)
Balance, Shares at Jun. 30, 2024		24,550,000
Net income	149,317		149,317
Share-based compensation	2,393	$ 2,393
Common stock issued under stock plans, net of shares withheld for employee taxes, Shares		1,000
Dividends accrued per share	(11,748)		(11,748)
Other comprehensive income (loss)	(135)			(135)
Balance at Sep. 30, 2024	$ 1,094,060	$ 113,989	$ 980,244	$ (173)
Balance, Shares at Sep. 30, 2024	24,551,000	24,551,000