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DERIVATIVE AND HEDGING ACTIVITIES - Netting Arrangements (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Derivative Assets |  |
Gross Amounts Presented in the Consolidated Balance Sheet | $ 19,347 | $ 677
Amounts Not Offset in the Consolidated Balance Sheet | (18,040) | (231)
Net Amount | 1,307 | 446
Derivative Liabilities |  |
Gross Amounts Presented in the Consolidated Balance Sheet | (123,635) | (26,999)
Amounts Not Offset in the Consolidated Balance Sheet | 18,040 | 231
Net Amount | $ (105,595) | $ (26,768)

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