UNAUDITED CONDENSED 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
Revenue:
Software license	$ 61,037	$ 70,671	$ 153,427	$ 139,016
Maintenance	59,590	55,161	118,555	108,136
Services	77,353	63,164	149,245	120,702
Total revenue	197,980	188,996	421,227	367,854
Cost of revenue:
Software license	1,250	1,312	2,550	2,333
Maintenance	7,011	6,315	14,229	12,230
Services	59,614	52,473	119,186	102,047
Total cost of revenue	67,875	60,100	135,965	116,610
Gross profit	130,105	128,896	285,262	251,244
Operating expenses:
Selling and marketing	75,887	74,016	147,175	135,094
Research and development	39,762	35,574	80,058	70,494
General and administrative	12,706	11,294	25,041	22,342
Acquisition-related		1,623		2,542
Restructuring		29		287
Total operating expenses	128,355	122,536	252,274	230,759
Income from operations	1,750	6,360	32,988	20,485
Foreign currency transaction (loss) gain	(917)	306	(241)	1,682
Interest income, net	161	188	326	478
Other income (expense), net	566	(1,356)	287	(3,654)
Income before (benefit)/provision for income taxes	1,560	5,498	33,360	18,991
(Benefit)/provision for income taxes	(9,846)	962	(5,067)	4,055
Net income	$ 11,406	$ 4,536	$ 38,427	$ 14,936
Earnings per share:
Basic	$ 0.15	$ 0.06	$ 0.50	$ 0.20
Diluted	$ 0.14	$ 0.06	$ 0.47	$ 0.19
Weighted-average number of common shares outstanding:
Basic	77,313	76,318	77,039	76,347
Diluted	82,945	79,422	82,412	79,329
Cash dividends declared per share	$ 0.03	$ 0.03	$ 0.06	$ 0.06