Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2011

Fair Value Measurements

Fair value measurements for assets and liabilities measured on a recurring basis

September 30, 2011	Total		Level 1		Level 2		Level 3
Assets
Cash and cash equivalents:
Tax free money market mutual funds	$	4,590	$	4,590	$	—	$	—
U.S. government money market mutual funds	128,845		128,845		—		—
Money market mutual funds	6,048		6,048		—		—
Securities owned, at fair value:
Corporate stocks - trading securities	1,348		1,348		—		—
Mutual funds	4,542		4,542		—		—
Total	$	145,373	$	145,373	$	—	$	—
Liabilities
Accounts payable and accrued expenses:
Currency forward contracts	$	12	$	—	$	12	$	—
Securities sold, not yet purchased, at fair value:
Common stock	1,395		1,395		—		—
Total	$	1,407	$	1,395	$	12	$	—

December 31, 2010	Total		Level 1		Level 2		Level 3
Assets
Cash and cash equivalents:
Tax free money market mutual funds	$	5,061	$	5,061	$	—	$	—
U.S. government money market mutual funds	192,617		192,617		—		—
Money market mutual funds	7,971		7,971		—		—
Securities owned, at fair value:
Corporate stocks - trading securities	19,051		19,051		—		—
Corporate stocks - available-for-sale securities	1,662		1,662		—		—
Mutual funds	5,076		5,076		—		—
Total	$	231,438	$	231,438	$	—	$	—
Liabilities
Accounts payable and accrued expenses:
Currency forward contracts	$	9	$	—	$	9	$	—
Securities sold, not yet purchased, at fair value:
Common stock	19,362		19,362		—		—
Total	$	19,371	$	19,362	$	9	$	—

Fair value measurements for assets and liabilities measured on a non-recurring basis

			Fair Value Measurements Using
	September30, 2011		Level 1		Level 2		Level 3		Total Losses
Goodwill — U.S. Operations	245,118		—		—		245,118		225,035
Total	$	245,118	$	—	$	—	$	245,118	$	225,035