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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, 2016
Dec. 31, 2015
Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues $ 199,574 $ 175,628 $ 182,127
Property and equipment, net 35,644 31,514 31,908
IL [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 101,273 88,556 90,061
Property and equipment, net 11,973 9,934 8,563
US [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 8,697 7,811 7,568
Property and equipment, net 106 73 120
BR [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 70,982 58,403 66,462
Property and equipment, net 19,188 17,228 17,801
AR [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 14,772 17,324 13,792
Property and equipment, net 4,377 4,279 5,424
Other Foreign Countries [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues $ 3,850 $ 3,534 $ 4,244