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SUPPLEMENTARY CONSOLIDATED BALANCE SHEET INFORMATION (Schedule of Other Current Liabilities) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
SUPPLEMENTARY BALANCE SHEET INFORMATION [Abstract]    
Payroll and related employee accruals $ 10,971 $ 9,037
Derivative instruments 103 148
Government authorities 585 1,167
Other 2,187 1,042
Other current liabilities $ 13,846 $ 11,394