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SEGMENT REPORTING (Schedule of Revenue and Long-Lived Assets by Geographical Areas) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues $ 253,335 $ 234,636 $ 199,574
Property and equipment, net 50,460 39,047 35,644
IL [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 116,186 116,391 101,273
Property and equipment, net 16,478 16,757 11,973
US [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 8,873 8,537 8,697
Property and equipment, net 142 118 106
BR [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 90,842 89,455 70,982
Property and equipment, net 24,562 17,969 19,188
AR [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 13,643 15,211 14,772
Property and equipment, net 3,820 4,203 4,377
MX [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 7,889
Property and equipment, net 3,285    
EC [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 8,362
Property and equipment, net 1,530
CO [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 2,450
Property and equipment, net 303
Other Foreign Countries [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 5,090 5,042 3,850
Property and equipment, net $ 340