Consolidated Statements of Changes in Shareholders' Equity - 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, 2019	$ 430,215	$ 205	$ 213,004	$ (22,370)	$ 227,165	$ 12,211
Beginning Balance (ASU 2016-13 [Member]) at Dec. 31, 2019	(594)				(594)
Beginning Balance, Shares at Dec. 31, 2019		20,560,833		(1,258,250)
Comprehensive income:
Net income	86,602				86,602
Other comprehensive income:
Change in unrealized gains on debt securities, net of tax	8,808					8,808
Comprehensive income	95,410
Common stock issued	1,360	$ 1	1,359
Common stock issued, Shares		28,476
Share-based compensation	953		953
Dividends to shareholders	(88,528)				(88,528)
Ending Balance at Dec. 31, 2020	438,816	$ 206	215,316	$ (22,370)	224,645	21,019
Ending Balance, Shares at Dec. 31, 2020		20,589,309		(1,258,250)
Comprehensive income:
Net income	65,756				65,756
Other comprehensive income:
Change in unrealized gains on debt securities, net of tax	(7,482)					(7,482)
Comprehensive income	58,274
Common stock issued	1,563		1,563
Common stock issued, Shares		32,995
Share-based compensation	579		579
Dividends to shareholders	(99,909)				(99,909)
Ending Balance at Dec. 31, 2021	$ 399,323	$ 206	217,458	$ (22,370)	190,492	13,537
Ending Balance, Shares at Dec. 31, 2021	19,364,054	20,622,304		(1,258,250)
Comprehensive income:
Net income	$ 55,602				55,602
Other comprehensive income:
Change in unrealized gains on debt securities, net of tax	(27,365)					(27,365)
Comprehensive income	28,237
Common stock issued	1,971	$ 1	1,970
Common stock issued, Shares		56,268
Purchase of treasury stock	(12,388)			$ (12,388)
Purchase of treasury stock, Shares				(264,449)
Share-based compensation	871		871
Dividends to shareholders	(100,582)				(100,582)
Ending Balance at Dec. 31, 2022	$ 317,432	$ 207	$ 220,299	$ (34,758)	$ 145,512	$ (13,828)
Ending Balance, Shares at Dec. 31, 2022	19,155,873	20,678,572		(1,522,699)