Consolidated Statements of Cash Flows (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Net income	$ 19,538	$ 14,275
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation expense	6,583	7,354
Amortization expense	4,464	5,758
Share-based compensation expense	4,133	2,938
Accretion of interest expense	529	401
Deferred income taxes	11,313	7,814
Allowance for doubtful accounts receivable	3,028	3,938
Changes in assets and liabilities:
Accounts receivable	(13,962)	(3,541)
Prepaid expenses and other assets	(4,745)	(9,780)
Accounts payable	889	1,561
Accrued liabilities	(217)	1,203
Accrued compensation-related costs	(11,751)	(19,120)
Income taxes payable	(2,266)	(1,782)
Other liabilities	(3,577)	(3,370)
Net cash used in operating activities	13,959	7,649
Cash flows from investing activities:
Purchases of property and equipment	(3,401)	(5,479)
Acquisitions of businesses, net of cash acquired	(1,046)	(33,870)
Payments of acquisition liabilities	(10,217)
Other investing, net	(225)
Net cash used in investing activities	(14,889)	(39,349)
Cash flows from financing activities:
Issuances of common stock	1,050	1,533
Payment upon termination of credit agreement	(250,613)
Proceeds from new credit agreement	250,613
Borrowings from banks, net of repayments	6,432	25,049
Payments of term loan	(4,599)	(40,920)
Payments of Debt Issuance Costs	(2,814)
Other, net	(839)	(119)
Net cash provided by (used in) financing activities	(770)	(14,457)
Effect of exchange rate changes on cash and cash equivalents	103	13
Net decrease in cash and cash equivalents	(1,597)	(46,144)
Cash and cash equivalents at beginning of the period	1,981	49,144
Cash and cash equivalents at end of the period	$ 384	$ 3,000