FAIR VALUE - Schedule of Carrying Amounts and Estimated Fair Value of Assets And Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Reported Value Measurement
Financial assets:
Cash, due from banks, federal funds sold and interest-bearing deposits	$ 423,472	$ 351,792
Loans, net	1,876,985	1,831,737
Accrued interest receivable	8,064	9,834
Nonmarketable equity securities	14,024	14,095
Financial liabilities:
Deposits	2,475,210	2,286,390
Securities sold under repurchase agreements	24,007	15,631
Accrued interest payable	759	804
Federal Home Loan Bank advances	49,096	109,101
Subordinated debentures	19,810	19,810
Fair Value
Financial assets:
Cash, due from banks, federal funds sold and interest-bearing deposits	423,472	351,792
Loans, net	1,891,696	1,846,868
Accrued interest receivable	8,064	9,834
Nonmarketable equity securities	14,024	14,095
Financial liabilities:
Deposits	2,476,497	2,288,157
Securities sold under repurchase agreements	24,007	15,631
Accrued interest payable	759	804
Federal Home Loan Bank advances	49,314	109,381
Subordinated debentures	18,742	17,406
Fair Value | Level 1 Inputs
Financial assets:
Cash, due from banks, federal funds sold and interest-bearing deposits	423,472	351,792
Loans, net	0	0
Accrued interest receivable	0	0
Nonmarketable equity securities	0	0
Financial liabilities:
Deposits	2,109,844	1,907,587
Securities sold under repurchase agreements	0	0
Accrued interest payable	0	0
Federal Home Loan Bank advances	0	0
Subordinated debentures	0	0
Fair Value | Level 2 Inputs
Financial assets:
Cash, due from banks, federal funds sold and interest-bearing deposits	0	0
Loans, net	0	0
Accrued interest receivable	8,064	9,834
Nonmarketable equity securities	14,024	14,095
Financial liabilities:
Deposits	366,653	380,570
Securities sold under repurchase agreements	24,007	15,631
Accrued interest payable	759	804
Federal Home Loan Bank advances	49,314	109,381
Subordinated debentures	18,742	17,406
Fair Value | Level 3 Inputs
Financial assets:
Cash, due from banks, federal funds sold and interest-bearing deposits	0	0
Loans, net	1,891,696	1,846,868
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 debentures	$ 0	$ 0