Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2020	$ 682,604	$ 106,289	$ 576,419	$ (104)
Balance, Shares at Dec. 31, 2020		24,128,000
Net income	89,705		89,705
Share-based compensation	7,666	$ 7,666
Common stock issued under stock Plans, net of shares withheld for employee taxes, Shares		132,000
Taxes paid related to net share settlement of stock awards	(5,345)	$ (5,345)
Dividends accrued at $1.74, $1.82 and $1.86 per share in 2021, 2022 and 2023	(42,659)		(42,659)
Other comprehensive income (loss)	50			50
Balance at Dec. 31, 2021	732,021	$ 108,610	623,465	(54)
Balance, Shares at Dec. 31, 2021		24,260,000
Net income	115,138		115,138
Share-based compensation	8,009	$ 8,009
Common stock issued under stock Plans, net of shares withheld for employee taxes, Shares		128,000
Taxes paid related to net share settlement of stock awards	(6,539)	$ (6,539)
Dividends accrued at $1.74, $1.82 and $1.86 per share in 2021, 2022 and 2023	(44,660)		(44,660)
Other comprehensive income (loss)	(24)			(24)
Balance at Dec. 31, 2022	$ 803,945	$ 110,080	693,943	(78)
Balance, Shares at Dec. 31, 2022	24,388,000	24,388,000
Net income	$ 174,621		174,621
Share-based compensation	8,275	$ 8,275
Common stock issued under stock Plans, net of shares withheld for employee taxes, Shares		108,000
Taxes paid related to net share settlement of stock awards	(7,233)	$ (7,233)
Dividends accrued at $1.74, $1.82 and $1.86 per share in 2021, 2022 and 2023	(45,768)		(45,768)
Other comprehensive income (loss)	(38)			(38)
Balance at Dec. 31, 2023	$ 933,802	$ 111,122	$ 822,796	$ (116)
Balance, Shares at Dec. 31, 2023	24,496,000	24,496,000