Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash Flows from operating activities
Net income	$ 34,865	$ 27,171	$ 22,356
Adjustments to reconcile net income to net cash provided by operating activities:
Bad debt expense	(64)	543	241
Deferred income taxes	(4,623)	(5,224)	2,203
(Gain) loss on disposal of fixed assets	(13)	110	(14)
Non-cash equity compensation	6,658	7,533	7,192
Depreciation and amortization	20,307	23,101	20,553
Deferred rent	2,235	1,153	106
Changes in operating assets and liabilities, net of the effect of acquisitions:
Contract receivables	(18,147)	(3,386)	15,948
Prepaid expenses and other assets	(1,043)	(778)	(3,962)
Accounts payable	7,996	2,396	(3,763)
Accrued salaries and benefits	4,703	8,677	(2,517)
Accrued expenses	2,822	5,832	(17,503)
Deferred revenue	(692)	664	4,341
Income tax payable	466	2,547	1,150
Restricted cash	1,971	(1,056)	2,135
Other liabilities	2,080	(1,105)	88
Net Cash Provided by Operating Activities	59,521	68,178	48,554
Cash Flows from Investing Activities
Capital expenditures	(10,206)	(7,283)	(8,068)
Payments for business acquisitions, net of cash received	(108,009)		(188,672)
Capitalized software development costs	(28)	(394)	(437)
Net Cash Used in Investing Activities	(118,243)	(7,677)	(197,177)
Cash Flows from Financing Activities
Advances from working capital facilities	213,138	43,317	315,784
Payments on working capital facilities	(153,138)	(103,317)	(250,784)
Debt issue costs	(8)	(21)	(655)
Proceeds from secondary offering, net			83,294
Proceeds from exercise of options	478	966	2,832
Tax benefits of stock option exercises and award vesting	227	914	3,113
Issuances of stock	77	66	88
Shares reacquired in net share issuance	(975)	(1,291)	(4,179)
Payments received on stockholder notes			12
Net Cash Provided by (Used in) Financing Activities	59,799	(59,366)	149,505
Effect of Exchange Rate on Cash	(281)	(187)	(65)
Increase in Cash	796	948	817
Cash, beginning of period	3,301	2,353	1,536
Cash, end of period	4,097	3,301	2,353
Supplemental disclosure of cash flow information:
Interest	2,334	3,873	4,664
Income taxes	$ 26,411	$ 18,977	$ 7,644