Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Cumulative effect, period of adoption, adjustment	Common Stock	Additional Paid-in Capital	Retained Earnings	Retained Earnings Cumulative effect, period of adoption, adjustment	Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2020			6,251,000
Beginning balance, value at Dec. 31, 2020	$ 221,575	$ 2,400	$ 6,251	$ 41,808	$ 173,498	$ 2,400	$ 18
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividend declared	(9,369)				(9,369)
Stock-based compensation expense	1,073			1,073
Exercise of stock options and vesting of restricted stock units, net (in shares)			43,000
Exercise of stock options and vesting of restricted stock units, net	(421)		$ 43	(464)
Repurchase of common stock (in shares)			(279,000)
Repurchase of common stock	(11,534)		$ (279)	(11,255)
Other comprehensive income (loss), net of tax	(3,424)						(3,424)
Net income	37,517				37,517
Ending balance (in shares) at Dec. 31, 2021			6,015,000
Ending balance, value at Dec. 31, 2021	237,817		$ 6,015	31,162	204,046		(3,406)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividend declared	(10,562)				(10,562)
Stock-based compensation expense	742			742
Exercise of stock options and vesting of restricted stock units, net (in shares)			20,000
Exercise of stock options and vesting of restricted stock units, net	(277)		$ 20	(297)
Repurchase of common stock (in shares)			(334,000)
Repurchase of common stock	(14,157)		$ (334)	(13,823)
Other comprehensive income (loss), net of tax	(25,675)						(25,675)
Net income	$ 30,741				30,741
Ending balance (in shares) at Dec. 31, 2022	5,700,728		5,701,000
Ending balance, value at Dec. 31, 2022	$ 218,629		$ 5,701	17,784	224,225		(29,081)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividend declared	(13,582)				(13,582)
Stock-based compensation expense	937			937
Exercise of stock options and vesting of restricted stock units, net (in shares)			21,000
Exercise of stock options and vesting of restricted stock units, net	(260)		$ 21	(281)
Repurchase of common stock (in shares)			(209,000)
Repurchase of common stock	(9,044)		$ (209)	(8,835)
Other comprehensive income (loss), net of tax	12,644						12,644
Net income	$ 25,394				25,394
Ending balance (in shares) at Dec. 31, 2023	5,513,459		5,513,000
Ending balance, value at Dec. 31, 2023	$ 234,718		$ 5,513	$ 9,605	$ 236,037		$ (16,437)