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, 2019	$ 634,036	$ 106,360	$ 527,746	$ (70)
Balance, Shares at Dec. 31, 2019		24,296,000
Net income	101,984		101,984
Share-based compensation	5,549	$ 5,549
Common stock issued under stock Plans, net of shares withheld for employee taxes, Shares		114,000
Repurchased common stock	(13,617)	$ (1,244)	(12,373)
Repurchased common stock, Shares		(282,000)
Taxes paid related to net share settlement of stock awards	(4,376)	$ (4,376)
Dividends accrued at $1.68, $1.74 and $1.82 per share in 2019, 2020 and 2021	(40,938)		(40,938)
Other comprehensive (loss) income	(34)			(34)
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 $1.68, $1.74 and $1.82 per share in 2019, 2020 and 2021	(42,659)		(42,659)
Other comprehensive (loss) income	50			50
Balance at Dec. 31, 2021	$ 732,021	$ 108,610	623,465	(54)
Balance, Shares at Dec. 31, 2021	24,260,000	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 $1.68, $1.74 and $1.82 per share in 2019, 2020 and 2021	(44,660)		(44,660)
Other comprehensive (loss) income	(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