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COMMITMENTS, CONTINGENCIES AND DERIVATIVES (Schedule of Derivatives Effect on OCI and Current Earnings) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Commitments and Contingencies Disclosure [Abstract]        
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net $ 414 $ (462) $ 1,570 $ (372)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net $ 203 $ 413 $ 487 $ 868