Consolidated Statements of Changes in Stockholders' Equity - USD ($)	Total	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjusted Balance	LINCO Bancshares, Inc.	BBM & Associates, Inc.	Delta Bancshares Company	Common Stock	Common Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Common Stock LINCO Bancshares, Inc.	Common Stock BBM & Associates, Inc.	Common Stock Delta Bancshares Company	Additional Paid-in Capital	Additional Paid-in Capital Cumulative Effect, Period of Adoption, Adjusted Balance	Additional Paid-in Capital LINCO Bancshares, Inc.	Additional Paid-in Capital BBM & Associates, Inc.	Additional Paid-in Capital Delta Bancshares Company	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings Cumulative Effect, Period of Adoption, Adjusted Balance	Deferred Compensation	Deferred Compensation Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Cumulative Effect, Period of Adoption, Adjusted Balance	Treasury Stock	Treasury Stock Cumulative Effect, Period of Adoption, Adjusted Balance
Beginning Balance at Dec. 31, 2019	$ 526,609,000	$ (717,000)	$ 525,892,000				$ 71,152,000	$ 71,152,000				$ 295,925,000	$ 295,925,000				$ 166,667,000	$ (717,000)	$ 165,950,000	$ 2,760,000	$ 2,760,000	$ 8,360,000	$ 8,360,000	$ (18,255,000)	$ (18,255,000)
Net income	45,270,000																45,270,000
Other comprehensive income (loss), net of tax	8,735,000																					8,735,000
Dividends on common stock	(13,494,000)																(13,494,000)
Issuance of common shares pursuant to the dividend reinvestment plan	680,000						102,000					578,000
Issuance of common shares pursuant to the deferred compensation plan	365,000						52,000					313,000
Issuance of restricted shares pursuant to the 2017 Stock Incentive Plan	857,000						99,000					758,000
Issuance of common shares pursuant to the employee stock purchase plan	245,000						44,000					201,000
Purchase of treasury shares	(213,000)																							(213,000)
Deferred compensation																				360,000				(360,000)
Tax benefit related to deferred compensation distributions	22,000											22,000
Grant of restricted stock units pursuant to the 2017 stock incentive plan	584,000											584,000
Release of restricted stock units pursuant to the 2017 stock incentive plan	(516,000)											(516,000)
Vested restricted shares/units compensation expense	(199,000)											(59,000)								(140,000)
Ending Balance at Dec. 31, 2020	568,228,000						71,449,000					297,806,000					197,726,000			2,980,000		17,095,000		(18,828,000)
Net income	51,490,000																51,490,000
Other comprehensive income (loss), net of tax	(17,926,000)																					(17,926,000)
Dividends on common stock	(15,054,000)																(15,054,000)
Issuance of common shares pursuant to the dividend reinvestment plan	333,000						32,000					301,000
Issuance of common shares pursuant to the deferred compensation plan	351,000						38,000					313,000
Issuance of restricted shares pursuant to the 2017 Stock Incentive Plan	928,000						111,000					817,000
Issuance of 2,375 common shares pursuant to the 2017 stock incentive plan	85,000						10,000					75,000
Issuance of shares pursuant to the acquisition				$ 44,191,000	$ 1,109,000				$ 5,049,000	$ 100,000				$ 39,142,000	$ 1,009,000
Issuance costs pursuant to acquisition of Delta Bancshares Company						$ (206,000)										$ (206,000)
Issuance of common shares pursuant to the employee stock purchase plan	391,000						46,000					345,000
Purchase of treasury shares	(326,000)																							(326,000)
Deferred compensation																				54,000				(54,000)
Grant of restricted stock units pursuant to the 2017 stock incentive plan	1,216,000											1,216,000
Release of restricted stock units pursuant to the 2017 stock incentive plan	(584,000)											(584,000)
Vested restricted shares/units compensation expense	(332,000)											185,000								(517,000)
Ending Balance at Dec. 31, 2021	633,894,000						76,835,000					340,419,000					234,162,000			2,517,000		(831,000)		(19,208,000)
Net income	72,952,000																72,952,000
Other comprehensive income (loss), net of tax	(150,676,000)																					(150,676,000)
Dividends on common stock	(17,830,000)																(17,830,000)
Issuance of common shares pursuant to the deferred compensation plan	331,000						34,000					297,000
Issuance of restricted shares pursuant to the 2017 Stock Incentive Plan	2,229,000						216,000					2,013,000
Issuance of 2,375 common shares pursuant to the 2017 stock incentive plan	199,000						20,000					179,000
Issuance of shares pursuant to the acquisition						92,172,000					$ 9,169,000					83,003,000
Issuance costs pursuant to acquisition of Delta Bancshares Company						$ (29,000)										$ (29,000)
Issuance of common shares pursuant to the employee stock purchase plan	713,000						92,000					621,000
Purchase of treasury shares	(340,000)																							(340,000)
Deferred compensation	(2,542,000)																			(2,037,000)				(505,000)
Grant of restricted stock units pursuant to the 2017 stock incentive plan	1,529,000											1,529,000
Release of restricted stock units pursuant to the 2017 stock incentive plan	(1,216,000)											(1,216,000)
Vested restricted shares/units compensation expense	1,769,000											185,000								1,584,000
Ending Balance at Dec. 31, 2022	$ 633,155,000						$ 86,366,000					$ 427,001,000					$ 289,284,000			$ 2,064,000		$ (151,507,000)		$ (20,053,000)