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DERIVATIVE INSTRUMENTS - Amount and Market Value of Mortgage Banking Derivatives (Details) - USD ($) | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Other Assets |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount Assets | $ 103,812,000 | $ 70,486,000
Derivatives asset, fair values | 1,534,000 | 1,005,000
Other Assets | Interest rate swaps and cap on loans |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount Assets | 103,812,000 | 70,486,000
Derivatives asset, fair values | 1,534,000 | 1,005,000
Other Assets | Foreign exchange contracts |  |
Derivatives, Fair Value [Line Items] |  |
Derivatives asset, fair values | 0 |
Accrued Expenses and Other Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount Liability | 103,812,000 | 70,486,000
Derivatives liability, fair values | 1,600,000 | 1,033,000
Accrued Expenses and Other Liabilities | Interest rate swaps and caps on loans |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount Liability | 103,812,000 | 70,486,000
Derivatives liability, fair values | $ 1,600,000 | $ 1,033,000

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