Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Accumulated Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance at Dec. 31, 2021	$ 399,323	$ 206	$ 217,458	$ (22,370)	$ 190,492	$ 13,537
Beginning Balance, Shares at Dec. 31, 2021		20,622,304		(1,258,250)
Comprehensive income (loss):
Net income	34,824				34,824
Other comprehensive income :
Change in unrealized gains (losses) on debt securities, net of tax	(33,501)					(33,501)
Comprehensive income	1,323
Common stock issued	1,970	$ 1	1,969
Common stock issued, Shares		56,268
Purchase of treasury stock	$ (12,236)			$ (12,236)
Purchase of treasury stock, Shares	(261,151)			(261,151)
Share-based compensation	$ 561		561
Dividends to shareholders	(17,922)				(17,922)
Ending Balance at Sep. 30, 2022	373,019	$ 207	219,988	$ (34,606)	207,394	(19,964)
Ending Balance, Shares at Sep. 30, 2022		20,678,572		(1,519,401)
Beginning Balance at Jun. 30, 2022	384,989	$ 207	219,744	$ (28,071)	201,983	(8,874)
Beginning Balance, Shares at Jun. 30, 2022		20,676,474		(1,379,842)
Comprehensive income (loss):
Net income	11,361				11,361
Other comprehensive income :
Change in unrealized gains (losses) on debt securities, net of tax	(11,090)					(11,090)
Comprehensive income	271
Common stock issued, Shares		2,098
Purchase of treasury stock	$ (6,535)			$ (6,535)
Purchase of treasury stock, Shares	(139,559)			(139,559)
Share-based compensation	$ 244		244
Dividends to shareholders	(5,950)				(5,950)
Ending Balance at Sep. 30, 2022	373,019	$ 207	219,988	$ (34,606)	207,394	(19,964)
Ending Balance, Shares at Sep. 30, 2022		20,678,572		(1,519,401)
Beginning Balance at Dec. 31, 2022	$ 317,432	$ 207	220,299	$ (34,758)	145,512	(13,828)
Beginning Balance, Shares at Dec. 31, 2022	19,155,873	20,678,572		(1,522,699)
Comprehensive income (loss):
Net income	$ 42,927				42,927
Other comprehensive income :
Change in unrealized gains (losses) on debt securities, net of tax	(6,535)					(6,535)
Comprehensive income	36,392
Common stock issued	$ 779		779
Common stock issued, Shares		28,576
Purchase of treasury stock, Shares	0
Share-based compensation	$ 827		827
Dividends to shareholders	(19,547)				(19,547)
Ending Balance at Sep. 30, 2023	$ 335,883	$ 207	221,905	$ (34,758)	168,892	(20,363)
Ending Balance, Shares at Sep. 30, 2023	19,184,449	20,707,148		(1,522,699)
Beginning Balance at Jun. 30, 2023	$ 340,567	$ 207	221,759	$ (34,758)	165,459	(12,100)
Beginning Balance, Shares at Jun. 30, 2023		20,702,713		(1,522,699)
Comprehensive income (loss):
Net income	9,961				9,961
Other comprehensive income :
Change in unrealized gains (losses) on debt securities, net of tax	(8,263)					(8,263)
Comprehensive income	1,698
Common stock issued	$ 165		(165)
Common stock issued, Shares		4,435
Purchase of treasury stock, Shares	0
Share-based compensation	$ 311		311
Dividends to shareholders	(6,528)				(6,528)
Ending Balance at Sep. 30, 2023	$ 335,883	$ 207	$ 221,905	$ (34,758)	$ 168,892	$ (20,363)
Ending Balance, Shares at Sep. 30, 2023	19,184,449	20,707,148		(1,522,699)