Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues
Services	$ 80,414	$ 72,678	$ 153,981	$ 138,845
Software and hardware	9,705	5,058	17,549	9,672
Reimbursable expenses	4,048	4,060	7,572	7,977
Total revenues	94,167	81,796	179,102	156,494
Cost of revenues (exclusive of depreciation and amortization, shown separately below)
Project personnel costs	50,163	45,541	97,844	88,899
Software and hardware costs	8,336	4,403	15,552	8,253
Reimbursable expenses	4,048	4,060	7,572	7,977
Other project related expenses	1,022	1,035	2,022	1,961
Total cost of revenues	63,569	55,039	122,990	107,090
Gross margin	30,598	26,757	56,112	49,404
Selling, general and administrative	18,851	16,559	36,722	31,351
Depreciation	719	515	1,402	978
Amortization	2,018	1,841	3,795	3,406
Acquisition costs	1,439	1,121	1,414	1,822
Adjustment to fair value of contingent consideration for purchase of business	33	167	33	338
Income from operations	7,538	6,554	12,746	11,509
Net interest expense	(53)	(25)	(58)	(38)
Net other income	(83)	(2)	(37)	44
Income before income taxes	7,402	6,527	12,651	11,515
Provision for income taxes	2,840	2,924	3,966	4,926
Net income	$ 4,562	$ 3,603	$ 8,685	$ 6,589
Basic net income per share (in dollars per share)	$ 0.15	$ 0.12	$ 0.29	$ 0.23
Diluted net income per share (in dollars per share)	$ 0.14	$ 0.12	$ 0.27	$ 0.22
Shares used in computing basic net income per share (in shares)	30,428	29,242	30,360	28,899
Shares used in computing diluted net income per share (in shares)	31,768	30,815	31,634	30,430