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Consolidated Statements Of Operations (USD $)
In Thousands, except Per Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Revenues:      
Products $ 103,285 $ 89,358 $ 65,021
Services 63,735 54,761 43,883
Total revenues 167,020 144,119 108,904
Cost of revenues:      
Products 24,231 21,306 16,609
Services 9,126 7,898 6,666
Total cost of revenues 33,357 29,204 23,275
Gross profit 133,663 114,915 85,629
Operating expenses:      
Research and development 36,064 31,660 25,674
Sales and marketing 69,543 64,609 55,130
General and administrative 9,629 10,190 11,930
Total operating expenses 115,236 106,459 92,734
Operating income (loss) 18,427 8,456 (7,105)
Financial income, net 4,200 2,057 1,987
Income (loss) before taxes on income 22,627 10,513 (5,118)
Taxes on income 1,290 879 818
Net income (loss) $ 21,337 $ 9,634 $ (5,936)
Basic net earnings (loss) per share $ 1.02 $ 0.49 $ (0.31)
Diluted net earnings (loss) per share $ 0.93 $ 0.44 $ (0.31)