SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($) payment	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Loans
Period for which federal funds are sold generally	1 day
Minimum number of consecutive payments made on a timely basis before returning a loan to accrual status | payment	6
Mortgage Servicing Rights
Servicing fees	$ 560	$ 510	$ 486
Period of historical loss experience used to determine general components of allowance for loan losses	5 years
1-4 family residential
Loans
Number of days delinquent for discontinuation of interest income on loans	90 days
Consumer
Loans
Number of days delinquent for discontinuation of interest income on loans	120 days
Commercial
Loans
Number of days delinquent for discontinuation of interest income on loans	120 days
Activity in allowance for loan losses
Outstanding balance over which loans are individually evaluated for impairment	$ 200