CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Revenues:
Product licenses		$ 113,503		$ 119,143		$ 125,952
Subscription services		30,574		27,839		22,322
Total product licenses and subscription services		144,077		146,982		148,274
Product support		285,079		281,740		295,703
Other services		83,005		101,147		135,853
Total revenues		512,161		529,869		579,830
Cost of revenues:
Product licenses		8,573		8,118		6,957
Subscription services		12,765		13,051		17,560
Total product licenses and subscription services		21,338		21,169		24,517
Product support		15,001		12,748		14,241
Other services		56,808		67,191		96,452
Total cost of revenues		93,147		101,108		135,210
Gross profit		419,014		428,761		444,620
Operating expenses:
Sales and marketing		158,740		148,522		225,086
Research and development		73,142		65,206		103,355
General and administrative		79,462		80,732		96,343
Restructuring costs		45		279		14,732
Total operating expenses		311,389		294,739		439,516
Income from operations		107,625		134,022		5,104
Interest income, net		2,203		284		162
Other income, net		3,218		3,558		5,785
Income before income taxes		113,046		137,864		11,051
Provision for income taxes		22,138		31,933		6,016
Net income		$ 90,908		$ 105,931		$ 5,035
Basic earnings per share	[1]	$ 7.96	[2]	$ 9.33	[2]	$ 0.45
Weighted average shares outstanding used in computing basic earnings per share		11,425		11,355		11,301
Diluted earnings per share	[1]	$ 7.89	[2]	$ 9.18	[2]	$ 0.44
Weighted average shares outstanding used in computing diluted earnings per share		11,516		11,539		11,356

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

[2] The sum of the basic and diluted earnings per share for the four quarters may differ from annual earnings per share as the weighted-average shares outstanding are computed independently for each of the quarters presented.