COMMITMENTS AND CONTINGENCIES Schedule of customer loan swaps (Details)		Sep. 30, 2017 USD ($) derivative	Dec. 31, 2016 USD ($) derivative
Derivative [Line Items]
Derivative, Number of Instruments Held | derivative		2
Derivative, fair value		$ 313,000	$ 278,000
Interest rate swaps
Derivative [Line Items]
Notional amount of derivative		43,000,000	43,000,000
Derivative, fair value	[1]	$ (8,123,000)	$ (8,372,000)
Interest rate swaps | Federal home loan bank 30-day
Derivative [Line Items]
Derivative, Number of Instruments Held | derivative		30	0
Notional amount of derivative		$ 150,753,000	$ 0
Derivative, fair value		2,618,000	0
Forward-Starting Interest Rate Swap
Derivative [Line Items]
Notional amount of derivative		50,000,000	50,000,000
Derivative, fair value	[2]	$ (98,000)	$ (389,000)
Commercial and Industrial Sector [Member] | Interest rate swaps
Derivative [Line Items]
Derivative, Number of Instruments Held | derivative		59	50
Notional amount of derivative		$ 296,045,000	$ 266,263,000
Derivative, fair value		$ 864,000	$ 1,945,000
Loans [Member] | Interest rate swaps
Derivative [Line Items]
Derivative, Number of Instruments Held | derivative		118	100
Notional amount of derivative		$ 592,090,000	$ 532,526,000
Derivative, fair value		$ 0	$ 0
Other Liabilities [Member] | Interest rate swaps | Federal home loan bank 30-day
Derivative [Line Items]
Derivative, Number of Instruments Held | derivative		29	50
Notional amount of derivative		$ 145,292,000	$ 266,263,000
Derivative, fair value		$ (3,482,000)	$ (1,945,000)

[1] Presented within accrued interest and other liabilities on the consolidated statements of condition.

[2] Presented within accrued interest and other liabilities on the consolidated statements of condition.