CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenues:
Product licenses		$ 19,118	$ 23,459	$ 40,130	$ 45,858
Subscription services		8,346	7,782	16,118	15,136
Total product licenses and subscription services		27,464	31,241	56,248	60,994
Product support		70,766	71,451	141,256	139,948
Other services		22,380	20,450	43,682	41,215
Total revenues		120,610	123,142	241,186	242,157
Cost of revenues:
Product licenses		1,747	2,322	3,419	4,458
Subscription services		3,400	3,356	6,439	6,448
Total product licenses and subscription services		5,147	5,678	9,858	10,906
Product support		4,542	3,687	8,876	6,960
Other services		14,686	14,736	28,773	29,058
Total cost of revenues		24,375	24,101	47,507	46,924
Gross profit		96,235	99,041	193,679	195,233
Operating expenses:
Sales and marketing		41,419	37,702	80,829	74,279
Research and development		19,561	19,160	37,987	36,735
General and administrative		19,582	21,092	39,839	43,311
Restructuring costs		0	8	0	33
Total operating expenses		80,562	77,962	158,655	154,358
Income from operations		15,673	21,079	35,024	40,875
Interest income, net		1,163	539	2,000	942
Other (expense) income, net		(2,618)	1,755	(4,474)	87
Income before income taxes		14,218	23,373	32,550	41,904
Provision for income taxes		3,142	4,489	6,607	8,748
Net income		$ 11,076	$ 18,884	$ 25,943	$ 33,156
Basic earnings per share	[1]	$ 0.97	$ 1.65	$ 2.27	$ 2.90
Weighted average shares outstanding used in computing basic earnings per share		11,444	11,428	11,441	11,418
Diluted earnings per share	[1]	$ 0.96	$ 1.64	$ 2.24	$ 2.88
Weighted average shares outstanding used in computing diluted earnings per share		11,592	11,523	11,593	11,499

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