FAIR VALUE DISCLOSURES - Fair market values of all financial instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Financial Assets:
Interest bearing deposits in banks	$ 238,402	$ 266,944
Time deposits in other banks	600	600
Debt securities available for sale	221,150	223,175
Debt securities held to maturity	33	33
Equity investments	12,675	12,226
Loans, including held for sale, net	113	1,460
Accrued interest receivable	6,100	6,100
Financial Liabilities:
Noninterest-bearing deposits	1,120,521	1,109,789
Interest-bearing deposits	1,479,181	1,493,183
Repurchase agreements	861	1,525
Junior subordinated debt	6,726	6,726
Fair Value
Financial Assets:
Total financial assets	2,928,595	2,938,391
Financial Liabilities:
Noninterest-bearing deposits	1,120,521	1,109,789
Interest-bearing deposits	1,401,500	1,437,013
Repurchase agreements	861	1,525
Junior subordinated debt	6,726	6,726
Accrued interest payable	368	374
Total financial liabilities	2,531,174	2,556,193
Carrying Amount
Financial Assets:
Total financial assets	2,923,838	2,926,873
Financial Liabilities:
Noninterest-bearing deposits	1,120,521	1,109,789
Interest-bearing deposits	1,479,181	1,493,183
Repurchase agreements	861	1,525
Junior subordinated debt	6,726	6,726
Accrued interest payable	368	374
Total financial liabilities	2,608,855	2,612,363
Interest rate swaps with customers | Fair Value
Financial Liabilities:
Interest rate swaps liabilities	1,111	426
Interest rate swaps with customers | Carrying Amount
Financial Liabilities:
Interest rate swaps liabilities	1,111	426
Interest rate swaps with financial institutions | Fair Value
Financial Liabilities:
Interest rate swaps liabilities	87	340
Interest rate swaps with financial institutions | Carrying Amount
Financial Liabilities:
Interest rate swaps liabilities	87	340
Level 1 Inputs | Fair Value
Financial Assets:
Cash and due from banks	41,513	59,255
Interest bearing deposits in banks	238,402	266,944
Debt securities available for sale	1,075	1,087
Level 1 Inputs | Carrying Amount
Financial Assets:
Cash and due from banks	41,513	59,255
Interest bearing deposits in banks	238,402	266,944
Debt securities available for sale	1,075	1,087
Level 2 Inputs | Fair Value
Financial Assets:
Time deposits in other banks	600	600
Debt securities available for sale	220,075	222,088
Debt securities held to maturity	35	35
Bank-owned life insurance	70,161	68,010
Servicing asset	207	209
Accrued interest receivable	7,082	7,429
Level 2 Inputs | Carrying Amount
Financial Assets:
Time deposits in other banks	600	600
Debt securities available for sale	220,075	222,088
Debt securities held to maturity	33	33
Bank-owned life insurance	70,161	68,010
Servicing asset	207	209
Accrued interest receivable	7,082	7,429
Level 2 Inputs | Interest rate swaps with customers | Fair Value
Financial Assets:
Interest rate swaps assets	87	340
Level 2 Inputs | Interest rate swaps with customers | Carrying Amount
Financial Assets:
Interest rate swaps assets	87	340
Level 2 Inputs | Interest rate swaps with financial institutions | Fair Value
Financial Assets:
Interest rate swaps assets	1,111	426
Level 2 Inputs | Interest rate swaps with financial institutions | Carrying Amount
Financial Assets:
Interest rate swaps assets	1,111	426
Level 3 Inputs | Fair Value
Financial Assets:
Equity investments	12,675	12,226
Loans, including held for sale, net	2,335,572	2,299,742
Level 3 Inputs | Carrying Amount
Financial Assets:
Equity investments	12,675	12,226
Loans, including held for sale, net	$ 2,330,817	$ 2,288,226