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PROPERTY AND EQUIPMENT, NET (Tables)
 12 Months Ended
Dec. 31, 2016
Property, Plant and Equipment [Abstract]  
Schedule of Property and Equipment, Net
Property and equipment, net consists of the following:
 
   
US dollars
  
   
December 31,
  
(in thousands)
  
2016
    
2015
  
Cost :
            
Operating equipment (*)
    
48,598
      
43,740
  
Office furniture, equipment and computers
    
26,992
      
24,790
  
Land
    
1,022
      
1,022
  
Buildings
    
1,888
      
1,845
  
Vehicles
    
4,924
      
3,810
  
Leasehold improvements
    
4,176
      
3,616
  
     
87,600
      
78,823
  
Less – accumulated depreciation and amortization (**)
    
(51,956
)
    
(47,309
)
Total property and equipment, net
    
35,644
      
31,514
  
 
(*)
As December 31, 2016 and 2015, an amount of US$ 28.6 million and US$ 26 million is subject to operating lease transactions, respectively.
 
(**)
As at December 31, 2016 and 2015, an amount of US$ 12.5 million and US$ 10.4 million is subject to operating lease transactions, respectively.