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DERIVATIVES DERIVATIVES - Disclosure by Type of Financial Instrument (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Credit Risk Contract [Member]    
Derivatives, Fair Value [Line Items]    
Credit Risk Derivative Liabilities, at Fair Value $ 100 $ 75
Fair Value Hedges | Matched interest rate swaps | Accrued interest and other liabilities    
Derivatives, Fair Value [Line Items]    
Gross amounts of recognized liabilities 38,808 29,189
Derivative Liability, Fair Value, Gross Asset (36,980) (14,577)
Derivative Asset, Fair Value, Amount Not Offset Against Collateral $ 1,828 $ 14,612