Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash Flows from Operating Activities
Net income	$ 38,075	$ 34,865	$ 27,171
Adjustments to reconcile net income to net cash provided by operating activities:
Bad debt expense (recovery)	336	(64)	543
Deferred income taxes	13,637	(4,623)	(5,224)
(Gain) loss on disposal of fixed assets	122	(13)	110
Non-cash equity compensation	8,770	6,658	7,533
Depreciation and amortization	24,440	20,307	23,101
Deferred rent	3,594	2,235	1,153
Changes in operating assets and liabilities, net of the effect of acquisitions:
Contract receivables	12,457	(18,147)	(3,386)
Prepaid expenses and other assets	(162)	(1,043)	(778)
Accounts payable	2,604	7,996	2,396
Accrued salaries and benefits	(4,154)	4,703	8,677
Accrued expenses	1,619	2,822	5,832
Deferred revenue	(2,638)	(692)	664
Income tax receivable and payable	(10,451)	466	2,547
Restricted cash	(807)	1,971	(1,056)
Other liabilities	(201)	2,080	(1,105)
Net Cash Provided by Operating Activities	87,241	59,521	68,178
Cash Flows from Investing Activities
Capital expenditures	(13,561)	(10,206)	(7,283)
Capitalized software development costs		(28)	(394)
Payments for business acquisitions, net of cash received	(9,974)	(108,009)
Net Cash Used in Investing Activities	(23,535)	(118,243)	(7,677)
Cash Flows from Financing Activities
Advances from working capital facilities	172,270	213,138	43,317
Payments on working capital facilities	(212,270)	(153,138)	(103,317)
Debt issue costs	(1,955)	(8)	(21)
Proceeds from exercise of options	78	478	966
Tax benefits of stock option exercises and award vesting	804	227	914
Issuances of stock	33	77	66
Share repurchases and shares reacquired in net share issuance	(11,602)	(975)	(1,291)
Net Cash Provided by (Used in) Financing Activities	(52,642)	59,799	(59,366)
Effect of Exchange Rate on Cash	(436)	(281)	(187)
Increase in Cash	10,628	796	948
Cash, beginning of period	4,097	3,301	2,353
Cash, end of period	14,725	4,097	3,301
Cash paid during the period for:
Interest	3,243	2,334	3,873
Income taxes	$ 20,377	$ 26,411	$ 18,977