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, 2020	$ 89,052	$ 225,507	$ 326,738	$ 13,568	$ 654,865
Balance (in shares) at Dec. 31, 2020	17,810,401
Increase (Decrease) in Stockholders' Equity [Roll forward]
Net income			47,549		47,549
Other comprehensive income (loss)				(5,506)	(5,506)
Cash dividends declared			(13,692)		(13,692)
Issuance of common stock	$ 148	332			480
Issuance of common stock (in shares)	29,566
Issuance of restricted stock	$ 46	(46)			0
Issuance of restricted stock (in shares)	9,193
Vesting of restricted stock	$ (88)	88			0
Vesting of restricted stock (in shares)	(17,681)
Stock-based compensation		387			387
Balance at Jun. 30, 2021	$ 89,158	226,268	360,595	8,062	684,083
Balance (in shares) at Jun. 30, 2021	17,831,479
Balance at Mar. 31, 2021	$ 89,131	225,861	343,511	3,566	662,069
Balance (in shares) at Mar. 31, 2021	17,826,076
Increase (Decrease) in Stockholders' Equity [Roll forward]
Net income			23,931		23,931
Other comprehensive income (loss)				4,496	4,496
Cash dividends declared			(6,847)		(6,847)
Issuance of common stock	$ 27	215			242
Issuance of common stock (in shares)	5,403
Issuance of restricted stock	$ 0	0			0
Issuance of restricted stock (in shares)	0
Stock-based compensation		192			192
Balance at Jun. 30, 2021	$ 89,158	226,268	360,595	8,062	684,083
Balance (in shares) at Jun. 30, 2021	17,831,479
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				17,843,081
Increase (Decrease) in Stockholders' Equity [Roll forward]
Net income			39,999		$ 39,999
Other comprehensive income (loss)				(93,081)	(93,081)
Cash dividends declared			(14,265)		(14,265)
Issuance of common stock	$ 193	306			499
Issuance of common stock (in shares)	38,566
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		696			696
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				17,895,181
Balance at Mar. 31, 2022	$ 89,420	227,589	399,347	(62,985)	$ 653,371
Balance (in shares) at Mar. 31, 2022	17,884,106
Increase (Decrease) in Stockholders' Equity [Roll forward]
Net income			20,271		20,271
Other comprehensive income (loss)				(34,944)	(34,944)
Cash dividends declared			(7,134)		(7,134)
Issuance of common stock	$ 30	221			251
Issuance of common stock (in shares)	6,075
Issuance of restricted stock	$ 25	(25)			0
Issuance of restricted stock (in shares)	5,000
Stock-based compensation		235			235
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				17,895,181