FAIR VALUE - Schedule of Carrying Amounts and Estimated Fair Value of Assets And Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Financial assets:
Marketable securities held to maturity	$ 184,527	$ 186,155
Carrying Amount
Financial assets:
Cash, due from banks, federal funds sold and interest-bearing deposits	83,306	127,543
Marketable securities held to maturity	182,248	189,371
Loans, net	1,284,318	1,233,651
Accrued interest receivable	7,631	7,419
Nonmarketable equity securities	7,679	10,500
Cash surrender value of life insurance	18,035	17,804
Financial liabilities:
Deposits	1,646,373	1,576,791
Securities sold under repurchase agreements	14,153	10,859
Accrued interest payable	805	889
Other debt		18,286
Federal Home Loan Bank advances	25,161	55,170
Subordinated debentures	14,310	19,310
Fair Value
Financial assets:
Cash, due from banks, federal funds sold and interest-bearing deposits	83,306	127,543
Marketable securities held to maturity	184,527	186,155
Loans, net	1,283,241	1,235,306
Accrued interest receivable	7,631	7,419
Nonmarketable equity securities	7,679	10,500
Cash surrender value of life insurance	18,035	17,804
Financial liabilities:
Deposits	1,646,579	1,577,490
Securities sold under repurchase agreements	14,153	10,859
Accrued interest payable	805	889
Other debt		18,286
Federal Home Loan Bank advances	25,156	55,160
Subordinated debentures	11,897	16,809
Fair Value | Level 1 Inputs
Financial assets:
Cash, due from banks, federal funds sold and interest-bearing deposits	54,089	100,205
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	1,329,161	1,234,875
Securities sold under repurchase agreements	0	0
Accrued interest payable	0	0
Other debt		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	29,217	27,338
Marketable securities held to maturity	184,527	186,155
Loans, net	0	0
Accrued interest receivable	7,631	7,419
Nonmarketable equity securities	7,679	10,500
Cash surrender value of life insurance	18,035	17,804
Financial liabilities:
Deposits	317,418	342,615
Securities sold under repurchase agreements	14,153	10,859
Accrued interest payable	805	889
Other debt		18,286
Federal Home Loan Bank advances	25,156	55,160
Subordinated debentures	11,897	16,809
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	1,283,241	1,235,306
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
Other debt		0
Federal Home Loan Bank advances	0	0
Subordinated debentures	$ 0	$ 0