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SUPPLEMENTARY BALANCE SHEET INFORMATION (Schedule of Short-Term Bank Credit) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
SUPPLEMENTARY BALANCE SHEET INFORMATION [Abstract]    
Short-term weighted average interest rate 2.43%us-gaap_ShortTermDebtWeightedAverageInterestRate   
Short-term bank credit $ 15,857us-gaap_ShortTermBorrowings   
Restricted cash as collateral for short-term bank $ 12,500us-gaap_CashCollateralForBorrowedSecurities