LOANS AND ASSET QUALITY - Non-accrual loans (Details 4) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Financing Receivable Nonaccrual Status [Roll Forward]
Balance	$ 3,751	$ 3,779	$ 3,779
Transfer into non-accrual	478	3,270
Transfer to REO		(240)
Loans paid down/payoffs	(336)	(1,145)
Loans brought to accrual status	(112)	(160)
Loans charged off	(254)	(1,753)	(1,913)
Balance	3,527	3,751	3,751
Commercial and industrial
Financing Receivable Nonaccrual Status [Roll Forward]
Balance
Transfer into non-accrual
Transfer to REO
Loans paid down/payoffs
Loans brought to accrual status
Loans charged off
Balance
Commercial real estate
Financing Receivable Nonaccrual Status [Roll Forward]
Balance	647	300	300
Transfer into non-accrual		840
Transfer to REO		(114)
Loans paid down/payoffs	(7)	(15)
Loans brought to accrual status
Loans charged off		(364)	(364)
Balance	640	647	647
Consumer and Indirect
Financing Receivable Nonaccrual Status [Roll Forward]
Balance	456	596	596
Transfer into non-accrual	353	969
Transfer to REO
Loans paid down/payoffs	(115)	(414)
Loans brought to accrual status	(112)	(25)
Loans charged off	(251)	(670)	(695)
Balance	331	456	456
Residential real estate
Financing Receivable Nonaccrual Status [Roll Forward]
Balance	2,648	2,883	2,883
Transfer into non-accrual	125	1,461
Transfer to REO		(126)
Loans paid down/payoffs	(214)	(716)
Loans brought to accrual status		(135)
Loans charged off	(3)	(719)	(854)
Balance	$ 2,556	$ 2,648	$ 2,648