Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	LINCO Bancshares, Inc.	BBM & Associates, Inc.	Delta Bancshares Company	Common Stock	Common Stock LINCO Bancshares, Inc.	Common Stock BBM & Associates, Inc.	Common Stock Delta Bancshares Company	Additional Paid-in Capital	Additional Paid-in Capital LINCO Bancshares, Inc.	Additional Paid-in Capital BBM & Associates, Inc.	Additional Paid-in Capital Delta Bancshares Company	Retained Earnings	Deferred Compensation	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Beginning balance at Dec. 31, 2020	$ 568,228				$ 71,449				$ 297,806				$ 197,726	$ 2,980	$ 17,095	$ (18,828)
Net income	16,330												16,330
Other comprehensive Income (loss) net tax	(8,314)														(8,314)
Cash dividends on common stock	(7,122)												(7,122)
Issuance of common shares pursuant to the dividend reinvestment plan	332				32				300
Issuance of common shares pursuant to the deferred compensation plan	189				23				166
Issuance of restricted shares pursuant to the stock incentive plan	943				111				832
Issuance of common shares pursuant to 2017 stock incentive plan	85				10				75
Issuance of shares pursuant to the acquisition		$ 44,191	$ 1,109			$ 5,049	$ 100			$ 39,142	$ 1,009
Issuance of common shares pursuant to the employee stock purchase plan	158				23				135
Deferred compensation	(1,574)													(1,762)		188
Tax benefit related to deferred compensation distributions	355								355
Grant of restricted units pursuant to 2017 stock incentive plan	1,216								1,216
Release of restricted units pursuant to 2017 stock incentive plan	(584)								(584)
Vested restricted shares/units compensation expense	524													524
Ending balance at Jun. 30, 2021	616,066				76,797				340,452				206,934	1,742	8,781	(18,640)
Beginning balance at Mar. 31, 2021	601,884				76,652				338,897				198,408	1,597	5,087	(18,757)
Net income	12,221												12,221
Other comprehensive Income (loss) net tax	3,694														3,694
Cash dividends on common stock	(3,695)												(3,695)
Issuance of common shares pursuant to the dividend reinvestment plan	161				15				146
Issuance of common shares pursuant to the deferred compensation plan	171				20				151
Issuance of shares pursuant to the acquisition	1,109				100				1,009
Issuance of common shares pursuant to the employee stock purchase plan	83				10				73
Deferred compensation														(117)		117
Tax benefit related to deferred compensation distributions	176								176
Vested restricted shares/units compensation expense	262													262
Ending balance at Jun. 30, 2021	616,066				76,797				340,452				206,934	1,742	8,781	(18,640)
Beginning balance at Dec. 31, 2021	633,894				76,835				340,419				234,162	2,517	(831)	(19,208)
Net income	34,374												34,374
Other comprehensive Income (loss) net tax	(127,409)														(127,409)
Cash dividends on common stock	(8,456)												(8,456)
Issuance of common shares pursuant to the deferred compensation plan	331				34				297
Issuance of restricted shares pursuant to the stock incentive plan	2,259				219				2,040
Issuance of common shares pursuant to 2017 stock incentive plan	199				20				179
Issuance of shares pursuant to the acquisition				$ 92,172				$ 9,169				$ 83,003
Issuance of common shares pursuant to the employee stock purchase plan	293				33				260
Issuance costs pursuant to acquisition of Delta Bancshares Company	29								29
Purchase of shares of treasury stock	(11)															(11)
Deferred compensation	(2,571)													(2,372)		(199)
Grant of restricted units pursuant to 2017 stock incentive plan	1,529								1,529
Release of restricted units pursuant to 2017 stock incentive plan	(1,216)								(1,216)
Vested restricted shares/units compensation expense	909								80					829
Ending balance at Jun. 30, 2022	626,268				86,310				426,562				260,080	974	(128,240)	(19,418)
Issuance costs pursuant to acquisition of Delta Bancshares Company	(29)								(29)
Beginning balance at Mar. 31, 2022	666,385				86,264				426,148				246,805	468	(74,028)	(19,272)
Net income	17,758												17,758
Other comprehensive Income (loss) net tax	(54,212)														(54,212)
Cash dividends on common stock	(4,483)												(4,483)
Issuance of common shares pursuant to the deferred compensation plan	250				26				224
Issuance of common shares pursuant to the employee stock purchase plan	169				20				149
Deferred compensation														146		(146)
Vested restricted shares/units compensation expense	401								41					360
Ending balance at Jun. 30, 2022	$ 626,268				$ 86,310				$ 426,562				$ 260,080	$ 974	$ (128,240)	$ (19,418)