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PROPERTY AND EQUIPMENT, NET (Schedule of Property And Equipment, Net) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Property, Plant and Equipment [Line Items]      
Cost $ 101,815 $ 87,600  
Less - accumulated depreciation and amortization [1] (62,768) (51,956)  
Total property and equipment, net 39,047 35,644 $ 31,514
Operating equipment, amount subject to lease transactions 30,400 28,600  
Accumulated depreciation and amortization subject to lease transactions 15,900 12,500  
Operating equipment [Member]      
Property, Plant and Equipment [Line Items]      
Cost [2] 52,096 48,598  
Office furniture, equipment and computers [Member]      
Property, Plant and Equipment [Line Items]      
Cost 33,913 26,992  
Land [Member]      
Property, Plant and Equipment [Line Items]      
Cost 1,022 1,022  
Building [Member]      
Property, Plant and Equipment [Line Items]      
Cost 2,205 1,888  
Vehicles [Member]      
Property, Plant and Equipment [Line Items]      
Cost 6,799 4,924  
Leasehold Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Cost $ 5,780 $ 4,176  
[1] As at December 31, 2017 and 2016, an amount of US$ 15.9 million and US$ 12.5 million is subject to operating lease transactions, respectively.
[2] As December 31, 2017 and 2016, an amount of US$ 30.4million and US$ 28.6 million is subject to operating lease transactions, respectively.