Goodwill and Other Intangibles (Tables)

9 Months Ended

Sep. 30, 2011

Goodwill and Other Intangibles

Changes in the carrying amount of goodwill by reportable segment

	U.S. Operations			European Operations		Asia Pacific Operations		Total
Balance as of December 31, 2010	$	439,294		$	28,484	$	701	$	468,479
Impairment loss	(225,035		)	—		—		(225,035		)
Acquisition of Ross Smith Energy	30,715			—		—		30,715
ITG Investment Research price adjustment	144			—		—		144
Currency translation adjustment	(20		)	1		—		(19		)
Balance as of September 30, 2011	$	245,098		$	28,485	$	701	$	274,284

Summary of acquired other intangible assets

	September 30, 2011				December 31, 2010
	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization		Useful Lives (Years)
Trade names	$	10,400	$	1,229	$	10,400	$	1,036	5.0
Customer related intangibles	27,851		3,943		20,901		2,571		7.8
Proprietary software	20,876		13,527		20,876		12,001		17.6
Trading rights	242		—		165		—		—
Other	50		—		50		—		—
Total	$	59,419	$	18,699	$	52,392	$	15,608