CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues:
Total revenues		$ 122,152	$ 126,010	$ 365,721	$ 367,462
Cost of revenues:
Total cost of revenues		23,389	24,389	73,614	71,896
Gross profit		98,763	101,621	292,107	295,566
Operating expenses:
Sales and marketing		45,429	42,005	147,742	123,213
Research and development		25,829	19,360	74,471	57,347
General and administrative		20,285	19,082	63,756	58,921
Total operating expenses		91,543	80,447	285,969	239,481
Income from operations		7,220	21,174	6,138	56,085
Interest income, net		3,441	1,449	8,698	3,449
Other income (expense), net		798	(1,903)	3,665	(6,377)
Income before income taxes		11,459	20,720	18,501	53,157
(Benefit from) provision for income taxes		(1,240)	2,536	(699)	9,463
Net income		$ 12,699	$ 18,184	$ 19,200	$ 43,694
Basic earnings per share	[1]	$ 1.11	$ 1.59	$ 1.68	$ 3.82
Weighted average shares outstanding used in computing basic earnings per share		11,467	11,447	11,458	11,443
Diluted earnings per share	[1]	$ 1.10	$ 1.58	$ 1.67	$ 3.78
Weighted average shares outstanding used in computing diluted earnings per share		11,538	11,499	11,502	11,567
Product licenses
Revenues:
Total revenues		$ 20,264	$ 22,356	$ 56,857	$ 62,730
Cost of revenues:
Total cost of revenues		377	1,763	4,255	5,182
Subscription services
Revenues:
Total revenues		7,240	7,725	22,486	23,843
Cost of revenues:
Total cost of revenues		3,259	3,592	9,953	10,031
Total product licenses and subscription services
Revenues:
Total revenues		27,504	30,081	79,343	86,573
Cost of revenues:
Total cost of revenues		3,636	5,355	14,208	15,213
Product support
Revenues:
Total revenues		74,463	72,881	222,554	214,159
Cost of revenues:
Total cost of revenues		5,079	4,218	14,685	13,094
Other services
Revenues:
Total revenues		20,185	23,048	63,824	66,730
Cost of revenues:
Total cost of revenues		$ 14,674	$ 14,816	$ 44,721	$ 43,589

[1] Basic and fully diluted earnings per share for class A and class B common stock are the same.