CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Revenue:
Software license	$ 48,292		$ 44,802		$ 154,918		$ 128,217
Maintenance	47,281		37,979		137,555		112,238
Services	42,058		39,230		128,607		115,117
Total revenue	137,631		122,011		421,080		355,572
Cost of revenue:
Software license	1,076		1,592		3,832		4,751
Maintenance	5,385		3,599		15,093		11,106
Services	39,921		32,907		120,061		97,772
Total cost of revenue	46,382		38,098		138,986		113,629
Gross profit	91,249		83,913		282,094		241,943
Operating expenses:
Selling and marketing	48,623		42,663		150,772		127,279
Research and development	28,558		19,786		80,490		59,123
General and administrative	8,825		7,130		28,377		21,203
Acquisition-related	54		545		417		545
Restructuring	192				192
Total operating expenses	86,252		70,124		260,248		208,150
Income from operations	4,997		13,789		21,846		33,793
Foreign currency transaction (loss) gain	(2,845)		661		(2,527)		(1,666)
Interest income, net	181		123		468		376
Other income (expense), net	19		(1,163)		(507)		(418)
Income (loss) before provision (benefit) for income taxes	2,352		13,410		19,280		32,085
Provision for income taxes	470		4,700		6,129		9,603
Net income	$ 1,882		$ 8,710		$ 13,151		$ 22,482
Earnings per share :
Basic	$ 0.02	[1]	$ 0.11	[1]	$ 0.17	[1]	$ 0.30	[1]
Diluted	$ 0.02	[1]	$ 0.11	[1]	$ 0.17	[1]	$ 0.29	[1]
Weighted-average number of common shares outstanding :
Basic	76,351	[1]	75,910	[1]	76,312	[1]	75,900	[1]
Diluted	78,653	[1]	78,158	[1]	78,531	[1]	77,744	[1]
Cash dividends declared per share	$ 0.030		$ 0.015		$ 0.075		$ 0.045

[1] The number of common shares and per share amounts have been retroactively restated for all prior periods presented to reflect the Company's two-for-one common stock split effected in the form of a common stock dividend distributed on April 1, 2014.