Condensed Consolidated Statements of Income (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	$ 16,945	$ 14,768	$ 52,041	$ 45,149
Services	98,518	85,025	278,950	238,115
Hardware and other	10,145	8,009	30,710	23,655
Total revenue	125,608	107,802	361,701	306,919
Costs and expenses:
Cost of license	1,679	2,445	5,140	6,160
Cost of services	43,689	35,835	123,606	105,939
Cost of hardware and other	8,496	6,812	25,240	20,049
Research and development	12,236	10,906	35,906	33,414
Sales and marketing	11,476	9,863	36,344	33,185
General and administrative	10,856	9,755	32,761	27,195
Depreciation and amortization	1,675	1,414	4,652	4,357
Total costs and expenses	90,107	77,030	263,649	230,299
Operating income	35,501	30,772	98,052	76,620
Other (loss) income, net	(55)	546	24	1,940
Income before income taxes	35,446	31,318	98,076	78,560
Income tax provision	13,106	11,630	36,430	28,110
Net income	$ 22,340	$ 19,688	$ 61,646	$ 50,450
Basic earnings per share	$ 0.30	$ 0.26	$ 0.82	$ 0.66
Diluted earnings per share	$ 0.30	$ 0.25	$ 0.81	$ 0.65
Weighted average number of shares:
Basic	74,687	76,452	75,255	76,880
Diluted	75,466	77,552	76,104	78,104