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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Schedule of Derivative Assets and Liabilities) (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Derivative Assets    
Gross Amount $ 748 $ 1,612
Net Amounts Presented in the Statement of Financial Position 748 1,612
Net Amount 748 1,612
Derivative Liabilities    
Gross Amount 51,295 2,881
Net Amounts Presented in the Statement of Financial Position 51,295 2,881
Net Amount $ 51,295 $ 2,881