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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income Statement [Abstract]      
Revenues $ 343,874 $ 332,033 $ 293,641
Cost of revenues 227,705 224,698 194,479
Gross profit 116,169 107,335 99,162
Operating expenses:      
Research and development, net 28,180 25,703 21,695
Selling and marketing 42,961 41,656 39,515
General and administrative 19,354 18,576 20,380
Other income (470) (1,746) (1,921)
Total operating expenses 90,025 84,189 79,669
Operating income 26,144 23,146 19,493
Financial expenses, net 6,349 5,889 6,303
Income before taxes on income 19,795 17,257 13,190
Taxes on income (benefit) (3,251) 1,697 1,761
Net income $ 23,046 $ 15,560 $ 11,429
Net Income per share:      
Basic net income per share $ 0.29 $ 0.20 $ 0.15
Diluted net income per share $ 0.28 $ 0.19 $ 0.15
Weighted average number of ordinary shares used in computing basic net income per share 78,579,013 77,916,912 77,702,788
Weighted average number of ordinary shares used in computing diluted net income per share 81,021,527 79,942,353 78,613,528