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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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