DERIVATIVES AND HEDGING (Narrative) (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2020 USD ($) derivative	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($) derivative
Other Commitments [Line Items]
Loss Contingency Accrual	$ 0		$ 0
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	600,000
Customer Loan Swaps
Other Commitments [Line Items]
Cash held as collateral	46,200,000		18,400,000
Interest Rate Lock Commitments
Other Commitments [Line Items]
Derivative, Notional Amount	128,481,000		29,606,000
Unrealized Gain (Loss) on Derivatives	1,500,000	$ 181,000
Interest Rate Swap On Loans [Member]
Other Commitments [Line Items]
Cash held as collateral	3,800,000.0		560,000
Derivative, Notional Amount	100,000,000		$ 100,000,000
Derivative Instrument Payment Of Interest Rate Swaps Designated As Cash Flow Hedges	52,000
Loss on Cash Flow Hedge Ineffectiveness	0
Interest Rate Swap On Borrowings
Other Commitments [Line Items]
Derivative, Notional Amount	100,000,000
Derivative, Number of Interest Rate Swap Agreements | derivative			2
Interest rate swaps
Other Commitments [Line Items]
Cash held as collateral	13,300,000		$ 8,800,000
Derivative, Notional Amount	43,000,000		43,000,000
Derivative Instrument Payment Of Interest Rate Swaps Designated As Cash Flow Hedges	240,000	152,000
Loss on Cash Flow Hedge Ineffectiveness	0	0
Forward Contracts [Member]
Other Commitments [Line Items]
Derivative, Notional Amount	28,356,000		11,915,000
Unrealized Gain (Loss) on Derivatives	858,000	$ 83,000
Federal home loan bank 30-day | Interest rate swaps
Other Commitments [Line Items]
Derivative, Notional Amount	$ 408,545,000		$ 366,351,000
Derivative, Number of Instruments Held | derivative	85		75
Commercial and Industrial Sector [Member] | Interest rate swaps
Other Commitments [Line Items]
Derivative, Notional Amount	$ 408,545,000		$ 411,594,000
Derivative, Number of Instruments Held | derivative	85		85
Contract, Two | Interest Rate Swap On Borrowings
Other Commitments [Line Items]
Derivative, Notional Amount	$ 50,000,000
Contract, Two | Interest rate swaps
Other Commitments [Line Items]
Derivative, Notional Amount	10,000,000		$ 10,000,000
Contract, One | Interest Rate Swap On Borrowings
Other Commitments [Line Items]
Derivative, Notional Amount	50,000,000
Contract, One | Interest rate swaps
Other Commitments [Line Items]
Derivative, Notional Amount	$ 10,000,000		$ 10,000,000