FAIR VALUE - Schedule of Carrying Amounts and Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Reported Value Measurement
Financial assets:
Cash, due from banks, federal funds sold and interest-bearing deposits	$ 97,351	$ 106,467
Marketable securities held to maturity	437,292	509,008
Loans, net	2,300,882	2,344,245
Accrued interest receivable	11,110	11,555
Nonmarketable equity securities	24,673	25,585
Financial liabilities:
Deposits	2,602,817	2,681,154
Securities sold under repurchase agreements	20,532	7,221
Accrued interest payable	4,211	2,348
Federal Home Loan Bank advances	195,000	290,000
Subordinated debt	47,719	49,153
Fair Value
Financial assets:
Cash, due from banks, federal funds sold and interest-bearing deposits	97,351	106,467
Marketable securities held to maturity	402,735	475,068
Loans, net	2,154,341	2,217,606
Accrued interest receivable	11,110	11,555
Nonmarketable equity securities	24,673	25,585
Financial liabilities:
Deposits	2,601,002	2,678,596
Securities sold under repurchase agreements	20,532	7,221
Accrued interest payable	4,211	2,348
Federal Home Loan Bank advances	194,871	289,926
Subordinated debt	48,357	50,025
Fair Value | Level 1 Inputs
Financial assets:
Cash, due from banks, federal funds sold and interest-bearing deposits	97,351	106,467
Marketable securities held to maturity	0	0
Loans, net	0	0
Accrued interest receivable	0	0
Nonmarketable equity securities	0	0
Financial liabilities:
Deposits	1,962,122	2,326,615
Securities sold under repurchase agreements	0	0
Accrued interest payable	0	0
Federal Home Loan Bank advances	0	0
Subordinated debt	0	0
Fair Value | Level 2 Inputs
Financial assets:
Cash, due from banks, federal funds sold and interest-bearing deposits	0	0
Marketable securities held to maturity	402,735	475,068
Loans, net	0	0
Accrued interest receivable	11,110	11,555
Nonmarketable equity securities	24,673	25,585
Financial liabilities:
Deposits	638,880	351,981
Securities sold under repurchase agreements	20,532	7,221
Accrued interest payable	4,211	2,348
Federal Home Loan Bank advances	194,871	289,926
Subordinated debt	48,357	50,025
Fair Value | Level 3 Inputs
Financial assets:
Cash, due from banks, federal funds sold and interest-bearing deposits	0	0
Marketable securities held to maturity	0	0
Loans, net	2,154,341	2,217,606
Accrued interest receivable	0	0
Nonmarketable equity securities	0	0
Financial liabilities:
Deposits	0	0
Securities sold under repurchase agreements	0	0
Accrued interest payable	0	0
Federal Home Loan Bank advances	0	0
Subordinated debt	$ 0	$ 0