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COMMITMENTS, CONTINGENCIES AND DERIVATIVES (Summary of Contractual and Notional Amounts of Financial Instruments) (Details) - USD ($) $ in Thousands | Jun. 30, 2017 | Dec. 31, 2016
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Customer Loan Swaps |  |
Financial Instruments [Line Items] |  |
Notional amount of derivative | $ 295,657 | $ 532,526
Forward-Starting Interest Rate Swap |  |
Financial Instruments [Line Items] |  |
Notional amount of derivative | 50,000 | 50,000
Interest rate swaps |  |
Financial Instruments [Line Items] |  |
Notional amount of derivative | 43,000 | 43,000
Interest rate lock commitments |  |
Financial Instruments [Line Items] |  |
Notional amount of derivative | 26,629 | 15,249
Forward Contracts [Member] |  |
Financial Instruments [Line Items] |  |
Notional amount of derivative | 10,882 | 15,125
Other Commitments |  |
Financial Instruments [Line Items] |  |
Notional amount of derivative | 736 | 432
Letters of Credit |  |
Financial Instruments [Line Items] |  |
Notional amount of derivative | 3,093 | 2,580
Home Equity |  |
Financial Instruments [Line Items] |  |
Notional amount of derivative | 438,683 | 454,225
Commercial and commercial real estate |  |
Financial Instruments [Line Items] |  |
Notional amount of derivative | 88,099 | 83,103
Residential |  |
Financial Instruments [Line Items] |  |
Notional amount of derivative | $ 43,588 | $ 17,795

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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