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DERIVATIVES DERIVATIVES - Disclosure by Type of Financial Instrument (Details) - Fair Value Hedges - Matched interest rate swaps - Accrued interest and other liabilities - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Derivatives, Fair Value [Line Items]    
Derivative Liability, Fair Value, Gross Liability $ 29,189 $ 12,687
Derivative Liability, Fair Value, Gross Asset (14,577) 2,279
Derivative Asset, Fair Value, Amount Not Offset Against Collateral $ 14,612 $ 14,966