Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Financial Instruments (Schedule of Interest Rates Used to Discount Estimated Cash Flows) (Details)

v3.8.0.1
Financial Instruments (Schedule of Interest Rates Used to Discount Estimated Cash Flows) (Details)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Loans from banks [Member]    
Disclosure of fair value measurement of assets [line items]    
Inputs used to determine fair value Euribor+ 2.53% Euribor+ 2.53%
Finance lease obligations[Member]    
Disclosure of fair value measurement of assets [line items]    
Inputs used to determine fair value Euribor+ 2.85% Euribor+ 2.85%
Loans from banks Two [Member]    
Disclosure of fair value measurement of assets [line items]    
Inputs used to determine fair value 4.65% Linkage to Consumer price index in Israel