Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss), Net of Tax [Member]	Total
Balance at Dec. 31, 2021	$ 89,215	$ 227,085	$ 386,750	$ (4,848)	$ 698,202
Balance (in shares) at Dec. 31, 2021	17,843,081
Increase (Decrease) in Stockholders' Equity [Roll forward]
Net income			59,371		59,371
Other comprehensive loss				(134,588)	(134,588)
Cash dividends declared			(22,115)		(22,115)
Issuance of common stock	$ 224	531			755
Issuance of common stock (in shares)	44,758
Issuance of restricted stock	$ 202	(202)			0
Issuance of restricted stock (in shares)	40,438
Vesting of restricted stock	$ (135)	135			0
Vesting of restricted stock (in shares)	(26,904)
Stock-based compensation		935			935
Balance at Sep. 30, 2022	$ 89,506	228,484	424,006	(139,436)	602,560
Balance (in shares) at Sep. 30, 2022	17,901,373
Balance at Jun. 30, 2022	$ 89,475	228,020	412,484	(97,929)	632,050
Balance (in shares) at Jun. 30, 2022	17,895,181
Increase (Decrease) in Stockholders' Equity [Roll forward]
Net income			19,372		19,372
Other comprehensive loss				(41,507)	(41,507)
Cash dividends declared			(7,850)		(7,850)
Issuance of common stock	$ 31	225			256
Issuance of common stock (in shares)	6,192
Stock-based compensation		239			239
Balance at Sep. 30, 2022	$ 89,506	228,484	424,006	(139,436)	602,560
Balance (in shares) at Sep. 30, 2022	17,901,373
Balance at Dec. 31, 2022	$ 89,591	229,012	438,596	(129,152)	$ 628,047
Balance (in shares) at Dec. 31, 2022	17,918,280				17,918,280
Increase (Decrease) in Stockholders' Equity [Roll forward]
Net income			59,345		$ 59,345
Other comprehensive loss				(12,249)	(12,249)
Cash dividends declared			(23,965)		(23,965)
Issuance of common stock	$ 212	625			837
Issuance of common stock (in shares)	42,473
Issuance of restricted stock	$ 264	(264)			0
Issuance of restricted stock (in shares)	52,865
Vesting of restricted stock	$ (107)	107			0
Vesting of restricted stock (in shares)	(21,409)
Forfeiture of restricted stock	$ (4)	4			0
Forfeiture of restricted stock (in shares)	(790)
Stock-based compensation		1,019			1,019
Balance at Sep. 30, 2023	$ 89,956	230,503	473,976	(141,401)	$ 653,034
Balance (in shares) at Sep. 30, 2023	17,991,419				17,991,419
Balance at Jun. 30, 2023	$ 89,918	229,943	461,578	(121,314)	$ 660,125
Balance (in shares) at Jun. 30, 2023	17,983,700
Increase (Decrease) in Stockholders' Equity [Roll forward]
Net income			20,628		20,628
Other comprehensive loss				(20,087)	(20,087)
Cash dividends declared			(8,230)		(8,230)
Issuance of common stock	$ 38	241			279
Issuance of common stock (in shares)	7,751
Vesting of restricted stock	$ 0	0			0
Vesting of restricted stock (in shares)	(32)
Stock-based compensation		319			319
Balance at Sep. 30, 2023	$ 89,956	$ 230,503	$ 473,976	$ (141,401)	$ 653,034
Balance (in shares) at Sep. 30, 2023	17,991,419				17,991,419