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SEGMENTS, CUSTOMERS AND GEOGRAPHIC INFORMATION (Schedule of Revenue by Geographic Location) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Segment Reporting Information [Line Items]      
Revenue $ 433,895 $ 343,199 $ 261,701
United States [Member]      
Segment Reporting Information [Line Items]      
Revenue 233,945 187,704 145,453
Israel [Member]      
Segment Reporting Information [Line Items]      
Revenue 7,827 6,909 7,282
United Kingdom [Member]      
Segment Reporting Information [Line Items]      
Revenue 36,146 26,652 24,837
Europe, the Middle East and Africa [Member]      
Segment Reporting Information [Line Items]      
Revenue [1] 85,757 78,525 49,659
Other [Member]      
Segment Reporting Information [Line Items]      
Revenue $ 70,220 $ 43,409 $ 34,470
[1] Excluding United Kingdom and Israel