Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues
Services	$ 86,568	$ 75,948	$ 240,549	$ 214,793
Software and hardware	5,620	7,450	23,169	17,122
Reimbursable expenses	4,570	4,076	12,142	12,053
Total revenues	96,758	87,474	275,860	243,968
Cost of revenues (exclusive of depreciation and amortization, shown separately below)
Project personnel costs	52,154	47,843	149,998	136,742
Software and hardware costs	4,919	6,301	20,471	14,554
Reimbursable expenses	4,570	4,076	12,142	12,053
Other project related expenses	1,252	1,027	3,274	2,988
Total cost of revenues	62,895	59,247	185,885	166,337
Gross margin	33,863	28,227	89,975	77,631
Selling, general and administrative	20,532	17,714	57,254	49,065
Depreciation	932	612	2,334	1,590
Amortization	1,955	2,258	5,750	5,664
Acquisition costs	29	9	1,443	1,831
Adjustment to fair value of contingent consideration for purchase of business	69	97	102	435
Income from operations	10,346	7,537	23,092	19,046
Net interest expense	(96)	(93)	(154)	(131)
Net other income	7	5	(30)	49
Income before income taxes	10,257	7,449	22,908	18,964
Provision for income taxes	3,023	2,307	6,989	7,233
Net income	$ 7,234	$ 5,142	$ 15,919	$ 11,731
Basic net income per share (in dollars per share)	$ 0.24	$ 0.17	$ 0.53	$ 0.40
Diluted net income per share (in dollars per share)	$ 0.23	$ 0.16	$ 0.50	$ 0.38
Shares used in computing basic net income per share (in shares)	30,141	30,021	30,287	29,273
Shares used in computing diluted net income per share (in shares)	31,808	31,674	31,692	30,844