Condensed Consolidated Statements of Income (USD $) In Thousands, except Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Income Statement [Abstract]
Net services revenue	$ 218,893	$ 158,424	$ 566,194	$ 436,265
Costs of services	169,898	126,272	435,969	346,574
Operating margin	48,995	32,152	130,225	89,691
Other operating expenses:
Infused management and technology	21,285	15,760	62,027	46,817
Selling, general and administrative	15,482	11,911	42,340	29,788
Total operating expenses	36,767	27,671	104,367	76,605
Income from operations	12,228	4,481	25,858	13,086
Interest income, net	5	14	20	24
Net income before provision for income taxes	12,233	4,495	25,878	13,110
Provision for income taxes	4,963	1,637	9,895	6,020
Net income	$ 7,270	$ 2,858	$ 15,983	$ 7,090
Net income per common share
Basic	$ 0.07	$ 0.03	$ 0.17	$ 0.11
Diluted	$ 0.07	$ 0.03	$ 0.16	$ 0.08
Weighted average shares used in calculating net income per common share
Basic	97,793,262	91,062,356	96,525,150	63,600,972
Diluted	101,868,888	97,464,457	100,912,803	92,959,707