Consolidated Statements of Changes in Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands		Common stock	Retained earnings Cumulative Effect, Period of Adoption, Adjustment	Retained earnings	Treasury stock	Accumulated other comprehensive (loss) income	Cumulative Effect, Period of Adoption, Adjustment	Total
Beginning Balance (in shares) at Dec. 31, 2022		10,584
Beginning balance at Dec. 31, 2022		$ 97,204	$ (649)	$ 156,958	$ (11,675)	$ (3,260)	$ (649)	$ 239,227
Increase (Decrease) in Stockholders' Equity
Net income				10,287				10,287
Other comprehensive income (loss), net of tax						81		81
Dividends on common stock (in shares)		2
Dividends on common stock		$ 46		(1,261)				(1,215)
Share-based compensation (in shares)	[1]	44
Share-based compensation	[1]	$ 947						947
Treasury stock purchased, at cost (in shares)		(338)
Treasury stock purchased, at cost					(8,219)			(8,219)
Ending Balance (in shares) at Mar. 31, 2023		10,292
Ending balance at Mar. 31, 2023		$ 98,197		165,335	(19,894)	(3,179)		240,459
Beginning Balance (in shares) at Dec. 31, 2022		10,584
Beginning balance at Dec. 31, 2022		$ 97,204	$ (649)	156,958	(11,675)	(3,260)	$ (649)	239,227
Increase (Decrease) in Stockholders' Equity
Net income								19,987
Other comprehensive income (loss), net of tax						(363)		(363)
Ending Balance (in shares) at Jun. 30, 2023		10,119
Ending balance at Jun. 30, 2023		$ 98,910		173,823	(25,037)	(3,623)		244,073
Beginning Balance (in shares) at Mar. 31, 2023		10,292
Beginning balance at Mar. 31, 2023		$ 98,197		165,335	(19,894)	(3,179)		240,459
Increase (Decrease) in Stockholders' Equity
Net income				9,700				9,700
Other comprehensive income (loss), net of tax						(444)		(444)
Dividends on common stock (in shares)		2
Dividends on common stock		$ 47		(1,212)				(1,165)
Share-based compensation (in shares)		50
Share-based compensation		$ 666						666
Treasury stock purchased, at cost (in shares)		(225)
Treasury stock purchased, at cost					(5,143)			(5,143)
Ending Balance (in shares) at Jun. 30, 2023		10,119
Ending balance at Jun. 30, 2023		$ 98,910		173,823	(25,037)	(3,623)		$ 244,073
Beginning Balance (in shares) at Dec. 31, 2023		10,063						10,063
Beginning balance at Dec. 31, 2023		$ 100,426		191,108	(27,367)	(2,737)		$ 261,430
Increase (Decrease) in Stockholders' Equity
Net income				9,586				9,586
Other comprehensive income (loss), net of tax						(115)		(115)
Dividends on common stock (in shares)		2
Dividends on common stock		$ 53		(1,314)				(1,261)
Share-based compensation (in shares)	[1]	129
Share-based compensation	[1]	$ 1,197						1,197
Treasury stock purchased, at cost (in shares)		(150)
Treasury stock purchased, at cost					(4,076)			(4,076)
Ending Balance (in shares) at Mar. 31, 2024		10,044
Ending balance at Mar. 31, 2024		$ 101,676		199,380	(31,443)	(2,852)		$ 266,761
Beginning Balance (in shares) at Dec. 31, 2023		10,063						10,063
Beginning balance at Dec. 31, 2023		$ 100,426		191,108	(27,367)	(2,737)		$ 261,430
Increase (Decrease) in Stockholders' Equity
Net income								19,040
Other comprehensive income (loss), net of tax						(343)		$ (343)
Ending Balance (in shares) at Jun. 30, 2024		9,975						9,975
Ending balance at Jun. 30, 2024		$ 102,226		207,534	(33,285)	(3,080)		$ 273,395
Beginning Balance (in shares) at Mar. 31, 2024		10,044
Beginning balance at Mar. 31, 2024		$ 101,676		199,380	(31,443)	(2,852)		266,761
Increase (Decrease) in Stockholders' Equity
Net income				9,454				9,454
Other comprehensive income (loss), net of tax						(228)		(228)
Dividends on common stock (in shares)		2
Dividends on common stock		$ 52		(1,300)				(1,248)
Share-based compensation (in shares)		(2)
Share-based compensation		$ 498						498
Treasury stock purchased, at cost (in shares)		(69)
Treasury stock purchased, at cost					(1,842)			$ (1,842)
Ending Balance (in shares) at Jun. 30, 2024		9,975						9,975
Ending balance at Jun. 30, 2024		$ 102,226		$ 207,534	$ (33,285)	$ (3,080)		$ 273,395

[1] Includes the issuance of common stock under employee benefit plans, which includes nonqualified stock options and restricted stock expense related entries, employee option exercises and the tax benefit of options exercised.