CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Revenue:
Software license	$ 54,012		$ 40,206		$ 106,626		$ 83,415
Maintenance	45,393		37,937		90,274		74,259
Services	43,580		39,172		86,549		75,887
Total revenue	142,985		117,315		283,449		233,561
Cost of revenue:
Software license	1,177		1,576		2,756		3,159
Maintenance	5,044		3,772		9,708		7,507
Services	40,470		32,530		80,140		64,865
Total cost of revenue	46,691		37,878		92,604		75,531
Gross profit	96,294		79,437		190,845		158,030
Operating expenses:
Selling and marketing	56,342		45,346		102,149		84,616
Research and development	27,323		19,761		51,932		39,337
General and administrative	10,250		7,277		19,552		14,073
Acquisition-related costs	157				363
Total operating expenses	94,072		72,384		173,996		138,026
Income from operations	2,222		7,053		16,849		20,004
Foreign currency transaction (loss) gain	(4)		(437)		318		(2,327)
Interest income, net	163		135		287		253
Other income (expense), net	6		(94)		(526)		745
Income (loss) before provision (benefit) for income taxes	2,387		6,657		16,928		18,675
Provision for income taxes	883		1,954		5,659		4,903
Net income	$ 1,504		$ 4,703		$ 11,269		$ 13,772
Earnings per share :
Basic	$ 0.02	[1]	$ 0.06	[1]	$ 0.15	[1]	$ 0.18	[1]
Diluted	$ 0.02	[1]	$ 0.06	[1]	$ 0.14	[1]	$ 0.18	[1]
Weighted-average number of common shares outstanding :
Basic	76,286	[1]	75,898	[1]	76,385	[1]	75,896	[1]
Diluted	78,280	[1]	77,498	[1]	78,563	[1]	77,538	[1]
Cash dividends declared per share	$ 0.030		$ 0.015		$ 0.045		$ 0.030

[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.