Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Revenue:
Software license	$ 52,614		$ 43,209
Maintenance	44,881		36,322
Services	42,969		36,715
Total revenue	140,464		116,246
Cost of revenue:
Software license	1,579		1,583
Maintenance	4,664		3,735
Services	39,670		32,335
Total cost of revenue	45,913		37,653
Gross profit	94,551		78,593
Selling and marketing	45,807		39,270
Research and development	24,609		19,576
General and administrative	9,302		6,796
Acquisition-related costs	206
Total operating expenses	79,924		65,642
Income from operations	14,627		12,951
Foreign currency transaction gain (loss)	322		(1,890)
Interest income, net	124		118
Other (expense) income, net	(532)		839
Income (loss) before provision (benefit) for income taxes	14,541		12,018
Provision for income taxes	4,776		2,949
Net income	$ 9,765		$ 9,069
Earnings per share :
Basic	$ 0.13	[1]	$ 0.12	[1]
Diluted	$ 0.12	[1]	$ 0.12	[1]
Weighted-average number of common shares outstanding :
Basic	76,298	[1]	75,894	[1]
Diluted	78,661	[1]	77,576	[1]
Cash dividends declared per share	$ 0.015		$ 0.015

[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