Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenue:
Software license	$ 19,130	$ 16,945	$ 58,202	$ 52,041
Services	112,549	98,518	321,096	278,950
Hardware and other	10,625	10,145	35,638	30,710
Total revenue	142,304	125,608	414,936	361,701
Costs and expenses:
Cost of license	2,305	1,679	7,348	5,140
Cost of services	46,682	43,689	137,930	123,606
Cost of hardware and other	9,109	8,496	29,819	25,240
Research and development	13,589	12,236	40,402	35,906
Sales and marketing	10,904	11,476	34,640	36,344
General and administrative	14,058	10,856	37,223	32,761
Depreciation and amortization	1,977	1,675	5,656	4,652
Total costs and expenses	98,624	90,107	293,018	263,649
Operating income	43,680	35,501	121,918	98,052
Other income (loss), net	604	(55)	1,225	24
Income before income taxes	44,284	35,446	123,143	98,076
Income tax provision	16,387	13,106	46,038	36,430
Net income	$ 27,897	$ 22,340	$ 77,105	$ 61,646
Basic earnings per share	$ 0.38	$ 0.30	$ 1.05	$ 0.82
Diluted earnings per share	$ 0.38	$ 0.30	$ 1.04	$ 0.81
Weighted average number of shares:
Basic	73,259	74,687	73,616	75,255
Diluted	73,761	75,466	74,162	76,104