GOODWILL AND OTHER INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
GOODWILL AND OTHER INTANGIBLE ASSETS
Changes in goodwill	$ 0	$ 0
Other Intangible Assets, net
Gross Intangible Assets	20,700	20,642
Accumulated Amortization	(13,930)	(12,851)
Net Intangible Assets	6,770	7,791
Core deposits
Other Intangible Assets, net
Gross Intangible Assets	13,750	13,750
Accumulated Amortization	(12,051)	(11,448)
Net Intangible Assets	$ 1,699	2,302
Customer relationships
Other Intangible Assets, net
Amortization period	15 years
Gross Intangible Assets	$ 6,629	6,629
Accumulated Amortization	(1,767)	(1,326)
Net Intangible Assets	4,862	5,303
Servicing asset
Other Intangible Assets, net
Gross Intangible Assets	321	263
Accumulated Amortization	(112)	(77)
Net Intangible Assets	$ 209	$ 186
Weighted Average | Core deposits
Other Intangible Assets, net
Amortization period	6 years 2 months 12 days	7 years 1 month 6 days
Weighted Average | Customer relationships
Other Intangible Assets, net
Amortization period	11 years	12 years
Weighted Average | Servicing asset
Other Intangible Assets, net
Amortization period	17 years 3 months 18 days	16 years 9 months 18 days
Minimum
Other Intangible Assets, net
Amortization period	7 years
Minimum | Core deposits
Other Intangible Assets, net
Amortization period	7 years
Maximum
Other Intangible Assets, net
Amortization period	20 years
Maximum | Core deposits
Other Intangible Assets, net
Amortization period	10 years