Condensed Consolidated Statements of Cash Flows (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net income	$ 18,574	$ 19,383
Adjustments to reconcile net income to net cash provided by operating activites:
Depreciation and amortization	7,934	7,410
Equity-based compensation	17,092	15,824
Bad debt expense	1,920	1,141
Net deferred income taxes	5,919	4,741
Other	2,448	104
Changes in assets and liabilities providing/(using) cash:
Accounts receivable	(5,236)	4,765
Unbilled services	(15,416)	(4,544)
Prepaid expenses and other current assets	1,777	(31)
Other assets	2,453	(597)
Accounts payable and accrued expenses	(4,674)	(3,506)
Accrued compensation and benefits	(18,201)	(14,507)
Deferred revenues	1,994	(113)
Other liabilities	(1,172)	395
Net cash provided by operating activities	15,412	30,465
Cash flows from investing activities:
Purchase of property and equipment	(6,410)	(4,998)
Business acquisitions, net of cash acquired	(5,891)	(11,807)
Purchase of investments	(3,500)	(3,175)
Net cash used in investing activities	(15,801)	(19,980)
Cash flows from financing activities:
Repurchases of Class A common stock	(24,114)	(8,608)
Dividends	(7,502)	(5,480)
Distributions and other payments to noncontrolling unitholders	(4,306)	(4,828)
Proceeds from exercises of IPO Options	267	82
Other	0	(3)
Net cash used in financing activities	(35,655)	(18,837)
Effect of exchange rate on cash and cash equivalents	310	(161)
Net decrease in cash and cash equivalents	(35,734)	(8,513)
Cash and cash equivalents at beginning of period	113,328	107,311
Cash and cash equivalents at end of period	$ 77,594	$ 98,798