DERIVATIVE AND HEDGING INSTRUMENTS - Gross Presentation, Effects of Offsetting, and a Net Presentation of Derivatives (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Offsetting Assets:
Gross Amounts of Recognized Assets / Liabilities	$ 29,344	$ 25,895
Gross Amounts Offset in the Balance Sheet	0	0
Net Amounts of Assets / Liabilities presented in the Balance Sheet	29,344	25,895
Financial Instruments	(2,069)	0
Cash Collateral Received	0	0
Net Amount	27,275	25,895
Offsetting Liabilities:
Gross Amounts of Recognized Assets / Liabilities	4,529	0
Gross Amounts Offset in the Balance Sheet	0	0
Net Amounts of Assets / Liabilities presented in the Balance Sheet	4,529	0
Financial Instruments	(2,069)	0
Cash Collateral Received	0	0
Net Amount	$ 2,460	$ 0

Fair value of liability associated with financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.

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