GOODWILL AND INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Goodwill [Roll Forward]
Beginning of year	$ 21,824	$ 21,824	$ 21,824
Acquired goodwill	0	0
Ending balance	21,824	21,824	21,824
Finite-lived intangible assets, net [Abstract]
Balance Acquired	11,608		11,608
Accumulated Amortization	9,717		9,523
Aggregate amortization expense	194	$ 226
Finite-lived intangible assets, future amortization expense [Abstract]
2018	540
2019	609
2020	484
2021	258
2022	0
Total	1,891
Core deposit intangibles
Finite-lived intangible assets, net [Abstract]
Balance Acquired	5,975		5,975
Accumulated Amortization	5,301		5,196
Other customer relationship intangibles
Finite-lived intangible assets, net [Abstract]
Balance Acquired	5,633		5,633
Accumulated Amortization	$ 4,416		$ 4,327