LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Net Loans (Details) $ in Thousands	Jun. 30, 2026 USD ($)	Mar. 31, 2026 USD ($)	Dec. 31, 2025 USD ($)	Jun. 30, 2025 USD ($)	Mar. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 6,513,861		$ 6,493,740
Percentage of Total	1.0000		1.0000
Less: Allowance for credit losses	$ (67,455)	$ (67,055)	$ (67,055)	$ (48,329)	$ (47,357)	$ (47,357)
Net loans receivable	6,446,406		6,426,685
Net deferred loan origination fees (costs) included in the above loan table	(671)		(259)
Farmland
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 26,273		$ 27,583
Percentage of Total	0.0040		0.0043
Less: Allowance for credit losses	$ (238)	(161)	$ (162)	(157)	(161)	(167)
Owner-occupied, nonfarm nonresidential properties
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 647,836		$ 636,444
Percentage of Total	0.0995		0.0980
Less: Allowance for credit losses	$ (6,042)	(6,161)	$ (6,176)	(4,527)	(5,827)	(5,696)
Agricultural production and other loans to farmers
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 5,396		$ 5,989
Percentage of Total	0.0008		0.0009
Less: Allowance for credit losses	$ (32)	(38)	$ (37)	(37)	(39)	(37)
Loans to depository institutions
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 2,491		$ 2,439
Percentage of Total	0.0004		0.0004
Less: Allowance for credit losses	$ (16)	0	$ (20)
Commercial and Industrial
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 886,736		$ 778,978
Percentage of Total	0.1361		0.1200
Less: Allowance for credit losses	$ (13,005)	(10,148)	$ (9,360)	(8,343)	(7,210)	(7,759)
Obligations (other than securities and leases) of states and political subdivisions
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 165,185		$ 171,486
Percentage of Total	0.0254		0.0264
Less: Allowance for credit losses	$ (1,702)	(1,770)	$ (1,823)	(1,328)	(1,371)	(1,369)
Other loans
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 58,720		$ 47,719
Percentage of Total	0.0090		0.0074
Less: Allowance for credit losses	$ (485)	(454)	$ (454)	(414)	(326)	(329)
Other construction loans and all land development and other land loans
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 438,329		$ 366,174
Percentage of Total	0.0673		0.0564
Less: Allowance for credit losses	$ (4,327)	(4,708)	$ (4,366)	(2,735)	(2,569)	(2,571)
Multifamily (5 or more) residential properties
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 624,696		$ 709,832
Percentage of Total	0.0959		0.1093
Less: Allowance for credit losses	$ (3,596)	(4,161)	$ (4,314)	(2,605)	(3,092)	(2,969)
Non-owner occupied, nonfarm nonresidential properties
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 1,344,691		$ 1,419,643
Percentage of Total	0.2064		0.2186
Less: Allowance for credit losses	$ (13,352)	(15,005)	$ (15,467)	(10,389)	(10,172)	(10,110)
1-4 Family Construction
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 34,599		$ 41,659
Percentage of Total	0.0053		0.0064
Less: Allowance for credit losses	$ (268)	(279)	$ (350)	(100)	(122)	(198)
Home equity lines of credit
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 265,398		$ 250,823
Percentage of Total	0.0407		0.0386
Less: Allowance for credit losses	$ (1,814)	(2,097)	$ (1,884)	(1,737)	(1,564)	(1,340)
Residential Mortgages secured by first liens
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 1,743,623		$ 1,763,071
Percentage of Total	0.2677		0.2715
Less: Allowance for credit losses	$ (15,509)	(15,362)	$ (15,910)	(9,862)	(9,099)	(8,958)
Residential Mortgages secured by junior liens
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 138,349		$ 140,790
Percentage of Total	0.0212		0.0217
Less: Allowance for credit losses	$ (1,722)	(1,583)	$ (1,732)	(1,572)	(1,451)	(1,343)
Other revolving credit plans
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 52,661		$ 48,953
Percentage of Total	0.0081		0.0075
Less: Allowance for credit losses	$ (1,490)	(1,414)	$ (1,222)	(1,032)	(855)	(960)
Automobile
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 14,984		$ 17,037
Percentage of Total	0.0023		0.0026
Less: Allowance for credit losses	$ (175)	(206)	$ (207)	(247)	(262)	(275)
Other consumer
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 48,701		$ 51,474
Percentage of Total	0.0075		0.0079
Less: Allowance for credit losses	$ (3,108)	(3,087)	$ (3,056)	(2,944)	(2,921)	(2,892)
Credit cards
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 14,837		$ 13,276
Percentage of Total	0.0023		0.0020
Less: Allowance for credit losses	$ (218)	(194)	$ (146)	(145)	(125)	(127)
Overdrafts
Loan Portfolio By Loan Grade [Line Items]
Loans receivable	$ 356		$ 370
Percentage of Total	0.0001		0.0001
Less: Allowance for credit losses	$ (356)	$ (227)	$ (369)	$ (155)	$ (191)	$ (257)