COMMITMENTS, CONTINGENCIES AND DERIVATIVES (Narrative) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) derivative	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) derivative swap	Jun. 30, 2018 USD ($)	Dec. 31, 2018 USD ($) derivative
Other Commitments [Line Items]
Loss Contingency Accrual	$ 0		$ 0		$ 0
Unrealized Gain (Loss) on Derivatives	(223,000)	$ (4,000)	$ (404,000)	$ 8,000
Derivative, Number of Interest Rate Swap Agreements | swap			2
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred			$ 1,300,000
Customer Loan Swaps
Other Commitments [Line Items]
Notional amount of derivative	818,514,000		818,514,000		833,030,000
Cash held as collateral	17,800,000		17,800,000
Interest Rate Swap On Loans [Member]
Other Commitments [Line Items]
Notional amount of derivative	100,000,000		100,000,000		0
Cash held as collateral	0		0
Loss on Cash Flow Hedge Ineffectiveness	0		0
Derivative Instrument Payment Of Interest Rate Swaps Designated As Cash Flow Hedges			34,000
Interest rate swaps
Other Commitments [Line Items]
Notional amount of derivative	43,000,000		43,000,000		43,000,000
Cash held as collateral	8,700,000		8,700,000
Loss on Cash Flow Hedge Ineffectiveness	0	0	0	0
Derivative Instrument Payment Of Interest Rate Swaps Designated As Cash Flow Hedges			318,000	489,000
Forward-Starting Interest Rate Swap
Other Commitments [Line Items]
Notional amount of derivative	0		0		25,000,000
Derivative Instrument Payment Of Interest Rate Swaps Designated As Cash Flow Hedges	32,000	2,000
Forward Contracts [Member]
Other Commitments [Line Items]
Notional amount of derivative	13,088,000		13,088,000		4,315,000
Unrealized Gain (Loss) on Derivatives	159,000	$ 69,000	242,000	$ 50,000
Cancellable Commitment
Other Commitments [Line Items]
Contractual Amounts Of Financial Instrument	285,000,000		285,000,000		270,800,000
Federal home loan bank 30-day | Interest rate swaps
Other Commitments [Line Items]
Notional amount of derivative	$ 366,341,000		$ 366,341,000		$ 118,891,000
Derivative, Number of Instruments Held | derivative	72		72		25
Commercial and Industrial Sector [Member] | Interest rate swaps
Other Commitments [Line Items]
Notional amount of derivative	$ 409,257,000		$ 409,257,000		$ 416,515,000
Derivative, Number of Instruments Held | derivative	84		84		82
Contract Two [Member] | Interest rate swaps
Other Commitments [Line Items]
Notional amount of derivative	$ 10,000,000		$ 10,000,000		$ 10,000,000
Contract Two [Member] | Forward-Starting Interest Rate Swap
Other Commitments [Line Items]
Notional amount of derivative	0		0		25,000,000
Contract, One | Interest rate swaps
Other Commitments [Line Items]
Notional amount of derivative	$ 10,000,000		$ 10,000,000		$ 10,000,000