CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Shares	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Beginning balance at Dec. 31, 2021	$ 845,025	$ 686,282	$ 207,076	$ (11,619)	$ (36,714)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	48,465		48,465
Other comprehensive income (loss), net of tax	(81,740)			(81,740)
Cash dividends declared	(20,933)		(20,933)
Reissuance of treasury stock for common share awards	0	(4,725)			4,725
Reissuance of treasury stock for deferred compensation plan for Boards of Directors	78				78
Repurchase of treasury stock in connection with employee incentive program and compensation plan for Boards of Directors	(1,436)				(1,436)
Common shares repurchased under share repurchase program then in effect	(5,987)				(5,987)
Common shares issued under dividend reinvestment plan	601	601
Common shares issued under compensation plan for Boards of Directors	252	44			208
Common shares issued under employee stock purchase plan	346	61			285
Stock-based compensation	2,153	2,153
Ending balance at Jun. 30, 2022	786,824	684,416	234,608	(93,359)	(38,841)
Beginning balance at Mar. 31, 2022	808,341	684,243	220,477	(62,666)	(33,713)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	24,888		24,888
Other comprehensive income (loss), net of tax	(30,693)			(30,693)
Cash dividends declared	(10,757)		(10,757)
Reissuance of treasury stock for common share awards	0	(727)			727
Reissuance of treasury stock for deferred compensation plan for Boards of Directors	78				78
Repurchase of treasury stock in connection with employee incentive program and compensation plan for Boards of Directors	(206)				(206)
Common shares repurchased under share repurchase program then in effect	(5,987)				(5,987)
Common shares issued under dividend reinvestment plan	296	296
Common shares issued under compensation plan for Boards of Directors	128	13			115
Common shares issued under employee stock purchase plan	160	15			145
Stock-based compensation	576	576
Ending balance at Jun. 30, 2022	786,824	684,416	234,608	(93,359)	(38,841)
Beginning balance at Dec. 31, 2022	785,328	686,450	265,936	(127,136)	(39,922)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	47,656		47,656
Other comprehensive income (loss), net of tax	8,216			8,216
Cash dividends declared	(24,147)		(24,147)
Reissuance of treasury stock for common share awards	0	(5,410)			5,410
Reissuance of treasury stock for deferred compensation plan for Boards of Directors	115				115
Repurchase of treasury stock in connection with employee incentive program and compensation plan for Boards of Directors	(1,054)				(1,054)
Common shares issued under dividend reinvestment plan	752	752
Common shares issued under compensation plan for Boards of Directors	271	19			252
Common shares issued under employee stock purchase plan	682	61			621
Stock-based compensation	3,159	3,159
Issuance of common shares related to merger with Limestone Bancorp, Inc.	177,929	177,929
Ending balance at Jun. 30, 2023	998,907	862,960	289,445	(118,920)	(34,578)
Beginning balance at Mar. 31, 2023	819,543	684,367	281,771	(110,979)	(35,616)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	21,096		21,096
Other comprehensive income (loss), net of tax	(7,941)			(7,941)
Cash dividends declared	(13,422)		(13,422)
Reissuance of treasury stock for common share awards	0	(725)			725
Reissuance of treasury stock for deferred compensation plan for Boards of Directors	115				115
Repurchase of treasury stock in connection with employee incentive program and compensation plan for Boards of Directors	(134)				(134)
Common shares issued under dividend reinvestment plan	350	350
Common shares issued under compensation plan for Boards of Directors	135	11			124
Common shares issued under employee stock purchase plan	227	19			208
Stock-based compensation	1,009	1,009
Issuance of common shares related to merger with Limestone Bancorp, Inc.	177,929	177,929
Ending balance at Jun. 30, 2023	$ 998,907	$ 862,960	$ 289,445	$ (118,920)	$ (34,578)