GOODWILL AND OTHER INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
GOODWILL AND OTHER INTANGIBLE ASSETS
Goodwill	$ 80,950	$ 80,950
Changes in goodwill	0	0
Other Intangible Assets, net
Gross Intangible Assets	20,720	20,747
Accumulated Amortization	(16,020)	(15,809)
Net Intangible Assets	$ 4,700	$ 4,938
Core deposits
Other Intangible Assets, net
Finite-Lived Intangible Asset, Useful Life	3 years 10 months 24 days	4 years 2 months 12 days
Gross Intangible Assets	$ 13,750	$ 13,750
Accumulated Amortization	(13,069)	(12,979)
Net Intangible Assets	$ 681	$ 771
Customer relationships
Other Intangible Assets, net
Finite-Lived Intangible Asset, Useful Life	8 years 9 months 18 days	9 years
Gross Intangible Assets	$ 6,629	$ 6,629
Accumulated Amortization	(2,762)	(2,651)
Net Intangible Assets	$ 3,867	$ 3,978
Servicing assets
Other Intangible Assets, net
Finite-Lived Intangible Asset, Useful Life	11 years 2 months 12 days	12 years 9 months 18 days
Gross Intangible Assets	$ 341	$ 368
Accumulated Amortization	(189)	(179)
Net Intangible Assets	$ 152	$ 189