FAIR VALUE - Schedule of Carrying Amounts and Estimated Fair Value of Assets And Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Financial assets:
Marketable securities held to maturity	$ 162,972	$ 162,800
Reported Value Measurement
Financial assets:
Cash, due from banks, federal funds sold and interest-bearing deposits	92,435	71,510
Marketable securities held to maturity	158,915	163,164
Loans, net	1,678,705	1,645,444
Accrued interest receivable	9,098	9,292
Nonmarketable equity securities	15,297	14,937
Cash surrender value of life insurance	34,039	26,301
Financial liabilities:
Deposits	1,983,990	1,871,480
Securities sold under repurchase agreements	10,814	12,228
Accrued interest payable	1,858	1,651
Federal Home Loan Bank advances	52,127	115,136
Subordinated debentures	11,310	12,810
Fair Value
Financial assets:
Cash, due from banks, federal funds sold and interest-bearing deposits	92,435	71,510
Marketable securities held to maturity	162,972	162,800
Loans, net	1,674,180	1,630,600
Accrued interest receivable	9,098	9,292
Nonmarketable equity securities	15,297	14,937
Cash surrender value of life insurance	34,039	26,301
Financial liabilities:
Deposits	1,986,587	1,870,632
Securities sold under repurchase agreements	10,814	12,228
Accrued interest payable	1,858	1,651
Federal Home Loan Bank advances	52,125	114,934
Subordinated debentures	9,134	10,724
Fair Value | Level 1 Inputs
Financial assets:
Cash, due from banks, federal funds sold and interest-bearing deposits	92,435	71,510
Marketable securities held to maturity	0	0
Loans, net	0	0
Accrued interest receivable	0	0
Nonmarketable equity securities	0	0
Cash surrender value of life insurance	0	0
Financial liabilities:
Deposits	1,456,492	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 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	1,674,180	1,630,600
Accrued interest receivable	0	0
Nonmarketable equity securities	0	0
Cash surrender value of life insurance	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
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	162,972	162,800
Loans, net	0	0
Accrued interest receivable	9,098	9,292
Nonmarketable equity securities	15,297	14,937
Cash surrender value of life insurance	34,039	26,301
Financial liabilities:
Deposits	530,095	434,647
Securities sold under repurchase agreements	10,814	12,228
Accrued interest payable	1,858	1,651
Federal Home Loan Bank advances	52,125	114,934
Subordinated debentures	$ 9,134	$ 10,724