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

Taxes on Income (Narrative) (Details)

v3.8.0.1
Taxes on Income (Narrative) (Details)
€ in Thousands, $ in Thousands
1 Months Ended 12 Months Ended
Jan. 04, 2016
Jan. 31, 2018
Jan. 31, 2017
Dec. 22, 2016
Dec. 31, 2017
EUR (€)
Dec. 31, 2016
Dec. 31, 2015
USD ($)
Dec. 31, 2015
EUR (€)
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]                
Corporate tax rates         24.00% 25.00% 26.50% 26.50%
Tax rate reduced 1.5% to a rate of 25%     Reduced from 25% to 23% in two steps        
Tax loss carryforwards         € 37,620      
Unrecognized tax benefits | $             $ 2,900  
Tax benefit               € 2,900
Reduced tax benefit         € 500      
Changes in tax rates or tax laws enacted or announced [Member]                
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]                
Tax rate reduced   23% 24%          
Luxembourg taxation [Member]                
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]                
Corporate tax rates         29.22%      
Italian taxation [Member]                
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]                
Corporate tax rates         27.50%      
Tax rate reduced         Starting from 2017 the IRES rate is reduced to 24%      
Italian taxation [Member] | Resident and Non-Resident [Member]                
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]                
Tax rate reduced         only on income arising in Italy at the rate from 0% to 4.82%      
Spanish taxation [Member]                
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]                
Corporate tax rates         30.00%      
Tax rate reduced         an aggregate turnover of less than EUR 10 million, pay a tax rate of 25%      
Spanish taxation [Member] | Subsidiaries [Member]                
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]                
Corporate tax rates         25.00%      
Israel [Member]                
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]                
Corporate tax rates         24.00% 25.00% 26.50% 26.50%