BORROWINGS, NARRATIVE (Details)	12 Months Ended
	Dec. 31, 2017 USD ($) institution	Dec. 31, 2016 USD ($)
Debt Disclosure [Abstract]
Pledged financial instruments for Federal Home Loan Bank	$ 217,000,000	$ 229,000,000
FHLB remaining borrowing capacity	$ 56,300,000
Number of financial institution (in institution) | institution	3
First arrangement short term borrowings	$ 10,000,000
Second arrangement short term borrowings	10,000,000
Third arrangement short term borrowings	$ 20,000,000
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	5000.00%
Short-term advances under Cash Management Advance program	$ 65,300,000.0
Variable rate interest rate terms	90 days
Fixed interest rate terms	30 days
Expiration date for Cash Management Advance program	Aug. 24, 2018
Maximum short-term borrowing at month end	$ 16,320,000	18,715,000
Short-term borrowing average balances	$ 10,515,000	13,891,000
Short term borrowing held by member of board of director		$ 3,100,000
Federal Funds Rate
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.50%