Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVE INSTRUMENTS (Schedule of Offsetting) (Details)

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DERIVATIVE INSTRUMENTS (Schedule of Offsetting) (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Gross assets presented in the consolidated balance sheet $ 23,339 $ 87,532
Gross assets subject to mater netting agreement - assets (17,053) (22,199)
Net amount - assets 6,286 65,333
Gross liabilities presented in the consolidated balance sheet (77,702) (35,523)
Gross amounts subject to master netting agreement - liabilities 17,053 22,199
Net amount - liabilities $ (60,649) $ (13,324)