Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2012

Changes to Carrying Amount of Goodwill by Reporting Unit

The following table presents changes to the carrying amount of goodwill by reporting unit during the three months ended March 31, 2012 (in thousands):

	Research		Consulting		Events		Total
Balance, December 31, 2011	$	366,980	$	99,677	$	41,893	$	508,550
Foreign currency translation adjustments		1,940		410		33		2,383
Balance, March 31, 2012 (1)	$	368,920	$	100,087	$	41,926	$	510,933

(1) The Company does not have any accumulated goodwill impairment losses.

Carrying Amounts of Amortizable Intangible Assets

The following tables present the carrying amounts of amortizable intangible assets as of the periods indicated (in thousands):

March 31, 2012	Trade Name			Customer Relationships			Total
Gross cost	$	5,758		$	7,210		$	12,968
Accumulated amortization		(2,591	)		(4,056	)		(6,647	)
Net	$	3,167		$	3,154		$	6,321
December 31, 2011	Trade Name			Customer Relationships			Total
Gross cost	$	5,758		$	7,210		$	12,968
Accumulated amortization		(2,303	)		(3,605	)		(5,908	)
Net	$	3,455		$	3,605		$	7,060

Estimated Future Amortization Expense by Year from Amortizable Intangibles

The estimated future amortization expense by year from amortizable intangibles is as follows (in thousands):

2012 (remaining nine months)	$	2,222
2013		2,955
2014		1,144
	$	6,321