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COMMITMENTS, CONTINGENCIES AND DERIVATIVES (Narrative) (Details) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2018 USD ($) derivative | Jun. 30, 2017 USD ($) | Jun. 30, 2018 USD ($) derivative swap | Jun. 30, 2017 USD ($) | Dec. 31, 2017 USD ($) derivative
Other Commitments [Line Items] |  |  |  |  |
Loss Contingency Accrual | $ 0 |  | $ 0 |  | $ 0
Loss on Cash Flow Hedge Ineffectiveness | $ 0 |  | $ 0 |  | 0
Derivative, Number of Instruments Held | derivative | 2 |  | 2 |  |
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred |  |  | $ 548,000 |  |
Unrealized Gain (Loss) on Derivatives | $ (4,000) | $ (235,000) | 8,000 | $ (223,000) |
Interest rate swaps |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |
Derivative Instrument Payment Of Interest Rate Swaps Designated As Cash Flow Hedges |  |  | 489,000 | 666,000 |
Notional amount of derivative | 43,000,000 |  | 43,000,000 |  | 43,000,000
Cash held as collateral | 5,500,000 |  | 5,500,000 |  |
Forward-Starting Interest Rate Swap |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |
Derivative Instrument Payment Of Interest Rate Swaps Designated As Cash Flow Hedges |  |  | 2,000 | (189,000) |
Notional amount of derivative | 25,000,000 |  | 25,000,000 |  | 50,000,000
Cash held as collateral | 12,700,000 |  | 12,700,000 |  |
Forward Contracts [Member] |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |
Notional amount of derivative | 12,585,000 |  | 12,585,000 |  | $ 8,065,000
Unrealized Gain (Loss) on Derivatives | $ 69,000 | $ 137,000 | $ 50,000 | $ 19,000 |
Federal home loan bank 30-day | Interest rate swaps |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |
Derivative, Number of Instruments Held | derivative | 11 |  | 11 |  | 23
Notional amount of derivative | $ 32,147,000 |  | $ 32,147,000 |  | $ 124,784,000
Commercial and Industrial Sector [Member] | Interest rate swaps |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |
Derivative, Number of Instruments Held | derivative | 74 |  | 74 |  | 65
Notional amount of derivative | $ 364,113,000 |  | $ 364,113,000 |  | $ 351,668,000
Contract One [Member] | Interest rate swaps |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |
Notional amount of derivative | 10,000,000 |  | $ 10,000,000 |  |
Contract One [Member] | Forward-Starting Interest Rate Swap |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |
Number of interest rate swap agreements | swap |  |  | 1 |  |
Notional amount of derivative | $ 25,000,000 |  | $ 25,000,000 |  |

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