FAIR VALUE - Schedule of Carrying Amounts and Estimated Fair Value of Assets And Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Financial assets:
Marketable securities held to maturity	$ 160,460	$ 162,800
Reported Value Measurement
Financial assets:
Cash, due from banks, federal funds sold and interest-bearing deposits	90,714	71,510
Marketable securities held to maturity	155,458	163,164
Loans, net	1,690,794	1,645,444
Accrued interest receivable	9,151	9,292
Nonmarketable equity securities	12,301	14,937
Financial liabilities:
Deposits	1,956,804	1,871,480
Securities sold under repurchase agreements	11,100	12,228
Accrued interest payable	1,642	1,651
Federal Home Loan Bank advances	55,118	115,136
Subordinated debentures	10,810	12,810
Fair Value
Financial assets:
Cash, due from banks, federal funds sold and interest-bearing deposits	90,714	71,510
Marketable securities held to maturity	160,460	162,800
Loans, net	1,705,155	1,630,600
Accrued interest receivable	9,151	9,292
Nonmarketable equity securities	12,301	14,937
Financial liabilities:
Deposits	1,958,978	1,870,632
Securities sold under repurchase agreements	11,100	12,228
Accrued interest payable	1,642	1,651
Federal Home Loan Bank advances	55,125	114,934
Subordinated debentures	8,677	10,724
Fair Value | Level 1 Inputs
Financial assets:
Cash, due from banks, federal funds sold and interest-bearing deposits	90,714	71,510
Marketable securities held to maturity	0	0
Loans, net	0	0
Accrued interest receivable	0	0
Nonmarketable equity securities	0	0
Financial liabilities:
Deposits	1,438,509	1,435,985
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
Marketable securities held to maturity	160,460	162,800
Loans, net	0	0
Accrued interest receivable	9,151	9,292
Nonmarketable equity securities	12,301	14,937
Financial liabilities:
Deposits	520,469	434,647
Securities sold under repurchase agreements	11,100	12,228
Accrued interest payable	1,642	1,651
Federal Home Loan Bank advances	55,125	114,934
Subordinated debentures	8,677	10,724
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	1,705,155	1,630,600
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