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COMMITMENTS, CONTINGENCIES AND DERIVATIVES (Schedule of customer loan swaps) (Details) $ in Thousands | Jun. 30, 2019 USD ($) derivative | Dec. 31, 2018 USD ($) derivative
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Interest rate swaps |  |
Derivative [Line Items] |  |
Notional amount of derivative | $ 43,000 | $ 43,000
Fair Value | $ (8,306) | $ (5,682)
Interest rate swaps | Federal home loan bank 30-day |  |
Derivative [Line Items] |  |
Derivative, Number of Instruments Held | derivative | 72 | 25
Notional amount of derivative | $ 366,341 | $ 118,891
Fair Value | 17,143 | 3,467
Forward-Starting Interest Rate Swap |  |
Derivative [Line Items] |  |
Notional amount of derivative | $ 0 | $ 25,000
Commercial and Industrial Sector [Member] | Interest rate swaps |  |
Derivative [Line Items] |  |
Derivative, Number of Instruments Held | derivative | 84 | 82
Notional amount of derivative | $ 409,257 | $ 416,515
Fair Value | $ (16,602) | $ 4,374
Loans [Member] | Interest rate swaps |  |
Derivative [Line Items] |  |
Derivative, Number of Instruments Held | derivative | 168 | 164
Notional amount of derivative | $ 818,514 | $ 833,030
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 | 12 | 57
Notional amount of derivative | $ 42,916 | $ 297,624
Fair Value | $ (541) | $ (7,841)

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