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SEGMENT REPORTING (Schedule of Revenue and Long-Lived Assets by Geographical Areas) (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues $ 120,794 $ 113,447  
Property and equipment, net 37,232   $ 39,047
IL [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 62,410 56,859  
Property and equipment, net 16,580   16,757
US [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 4,184 4,040  
Property and equipment, net 169   118
BR [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 45,198 42,333  
Property and equipment, net 17,813   17,969
AR [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 6,307 7,906  
Property and equipment, net 2,670   $ 4,203
Other Foreign Countries [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues $ 2,695 $ 2,309