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FINANCIAL INSTRUMENTS - Offsetting Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Total asset derivatives    
Gross amounts presented in the consolidated balance sheet $ 84 $ 10,770
Gross amounts not offset in the consolidated balance sheet subject to netting agreements (52) 0
Net amount 32 10,770
Total liability derivatives    
Gross amounts presented in the consolidated balance sheet (5,798) 0
Gross amounts not offset in the consolidated balance sheet subject to netting agreements 52 0
Net amount $ (5,746) $ 0