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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Revenues:        
Total revenues $ 120,602 $ 119,220 $ 243,569 $ 241,452
Cost of revenues:        
Total cost of revenues 25,040 24,375 50,225 47,507
Gross profit 95,562 94,845 193,344 193,945
Operating expenses:        
Sales and marketing 50,978 41,626 102,313 81,208
Research and development 25,082 19,561 48,642 37,987
General and administrative 21,299 19,582 43,471 39,839
Total operating expenses 97,359 80,769 194,426 159,034
(Loss) income from operations (1,797) 14,076 (1,082) 34,911
Interest income, net 3,223 1,163 5,257 2,000
Other income (expense), net 4,461 (2,618) 2,867 (4,474)
Income before income taxes 5,887 12,621 7,042 32,437
Provision for income taxes 1,059 2,668 541 6,927
Net income $ 4,828 $ 9,953 $ 6,501 $ 25,510
Basic earnings per share [1] $ 0.42 $ 0.87 $ 0.57 $ 2.23
Weighted average shares outstanding used in computing basic earnings per share 11,459 11,444 11,453 11,441
Diluted earnings per share [1] $ 0.42 $ 0.86 $ 0.57 $ 2.20
Weighted average shares outstanding used in computing diluted earnings per share 11,493 11,592 11,488 11,593
Product licenses        
Revenues:        
Total revenues $ 19,292 $ 17,728 $ 36,593 $ 40,374
Cost of revenues:        
Total cost of revenues 1,667 1,747 3,878 3,419
Subscription services        
Revenues:        
Total revenues 7,584 8,346 15,246 16,118
Cost of revenues:        
Total cost of revenues 3,445 3,400 6,694 6,439
Total product licenses and subscription services        
Revenues:        
Total revenues 26,876 26,074 51,839 56,492
Cost of revenues:        
Total cost of revenues 5,112 5,147 10,572 9,858
Product support        
Revenues:        
Total revenues 73,676 70,766 148,091 141,278
Cost of revenues:        
Total cost of revenues 4,810 4,542 9,606 8,876
Other services        
Revenues:        
Total revenues 20,050 22,380 43,639 43,682
Cost of revenues:        
Total cost of revenues $ 15,118 $ 14,686 $ 30,047 $ 28,773
[1] Basic and fully diluted earnings per share for class A and class B common stock are the same.