FAIR VALUE - Summary of Financial Instruments at Carrying Amounts and Estimated Fair Values (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Financial Assets
Interest-bearing deposits with banks	$ 123,176	$ 197,848
Restricted investments in bank stock	24,111	20,232
Investment securities	890,357	829,711
Carrying Amount
Financial Assets
Cash and due from banks	60,970	51,026
Interest-bearing deposits with banks	123,176	197,848
Restricted investments in bank stock	24,111	20,232
Investment securities	890,357	829,711
Loans held for sale	6,026	6,614
Loans, net of allowance for credit losses	3,931,631	3,882,525
Accrued interest receivable	20,443	21,058
Financial Liabilities
Deposits	4,533,560	4,623,096
Securities sold under agreements to repurchase and federal funds purchased	32,501	25,863
FHLB advances and other borrowings	209,218	115,364
Subordinated notes and trust preferred debt	36,970	68,680
Accrued interest payable	3,055	2,924
Off-balance sheet instruments	0	0
Carrying Amount | Derivatives
Financial Assets
Derivatives	15,325	13,451
Financial Liabilities
Derivatives	15,952	12,575
Fair Value
Financial Liabilities
Off-balance sheet instruments	0	0
Fair Value | Fair Value
Financial Assets
Cash and due from banks	60,970	51,026
Interest-bearing deposits with banks	123,176	197,848
Investment securities	890,357	829,711
Loans held for sale	6,026	6,614
Loans, net of allowance for credit losses	3,891,032	3,783,097
Accrued interest receivable	20,443	21,058
Financial Liabilities
Deposits	4,531,986	4,621,081
Securities sold under agreements to repurchase and federal funds purchased	32,501	25,863
FHLB advances and other borrowings	209,092	114,851
Subordinated notes and trust preferred debt	38,313	67,597
Accrued interest payable	3,055	2,924
Fair Value | Fair Value | Derivatives
Financial Assets
Derivatives	15,325	13,451
Financial Liabilities
Derivatives	15,952	12,575
Fair Value | Level 1
Financial Assets
Cash and due from banks	60,970	51,026
Interest-bearing deposits with banks	123,176	197,848
Investment securities	19,024	18,257
Loans held for sale	0	0
Loans, net of allowance for credit losses	0	0
Accrued interest receivable	0	0
Financial Liabilities
Deposits	0	0
Securities sold under agreements to repurchase and federal funds purchased	0	0
FHLB advances and other borrowings	0	0
Subordinated notes and trust preferred debt	0	0
Accrued interest payable	0	0
Off-balance sheet instruments	0	0
Fair Value | Level 1 | Derivatives
Financial Assets
Derivatives	0	0
Financial Liabilities
Derivatives	0	0
Fair Value | Level 2
Financial Assets
Cash and due from banks	0	0
Interest-bearing deposits with banks	0	0
Investment securities	855,332	794,534
Loans held for sale	6,026	6,614
Loans, net of allowance for credit losses	0	0
Accrued interest receivable	4,672	5,361
Financial Liabilities
Deposits	4,531,986	4,621,081
Securities sold under agreements to repurchase and federal funds purchased	32,501	25,863
FHLB advances and other borrowings	209,092	114,851
Subordinated notes and trust preferred debt	38,313	67,597
Accrued interest payable	3,055	2,924
Off-balance sheet instruments	0	0
Fair Value | Level 2 | Derivatives
Financial Assets
Derivatives	15,236	13,431
Financial Liabilities
Derivatives	15,952	12,575
Fair Value | Level 3
Financial Assets
Cash and due from banks	0	0
Interest-bearing deposits with banks	0	0
Investment securities	16,001	16,920
Loans held for sale	0	0
Loans, net of allowance for credit losses	3,891,032	3,783,097
Accrued interest receivable	15,771	15,697
Financial Liabilities
Deposits	0	0
Securities sold under agreements to repurchase and federal funds purchased	0	0
FHLB advances and other borrowings	0	0
Subordinated notes and trust preferred debt	0	0
Accrued interest payable	0	0
Off-balance sheet instruments	0	0
Fair Value | Level 3 | Derivatives
Financial Assets
Derivatives	89	20
Financial Liabilities
Derivatives	$ 0	$ 0