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COMMITMENTS, CONTINGENT LIABILITIES AND RESTRICTIONS (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Contract amount of commitments and contingencies | $ 1,129,270 | $ 1,103,786
Minimum [Member] |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Range of reasonably possible losses for such matters in the aggregate, beyond the existing recorded liability | 0 |
Maximum [Member] |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Range of reasonably possible losses for such matters in the aggregate, beyond the existing recorded liability | 1,000 |
Commitments to Extend Credit [Member] |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Contract amount of commitments and contingencies | 1,095,696 | 1,080,004
Standby Letters of Credit [Member] |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Contract amount of commitments and contingencies | $ 33,574 | $ 23,782

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