Goodwill and Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2011

Changes to the Carrying Amount of Goodwill by Reporting Segments

The following table presents changes to the carrying amount of goodwill by reporting segment during the six months ended June 30, 2011 (in thousands):

	Research		Consulting		Events		Total
Balance, December 31, 2010	$	368,521	$	99,817	$	41,927	$	510,265
Foreign currency translation adjustments		4,862		798		102		5,762
Balance, June 30, 2011 (1)	$	373,383	$	100,615	$	42,029	$	516,027

(1) The Company did not record any goodwill impairment losses during the six months ended June 30, 2011. In addition, the Company does not have any accumulated goodwill impairment losses.

Carrying Amount of Amortizable Intangible Assets

The following tables present the carrying amounts of amortizable intangible assets as of June 30, 2011 and December 31, 2010 (in thousands):

June 30, 2011	Content			Trade Name			Customer Relationships			Total
Gross cost	$	10,634		$	5,758		$	7,210		$	23,602
Accumulated amortization		(10,634	)		(1,727	)		(2,704	)		(15,065	)
Net	$	—		$	4,031		$	4,506		$	8,537
December 31, 2010	Content			Trade Name			Customer Relationships			Total
Gross cost	$	10,634		$	5,758		$	7,210		$	23,602
Accumulated amortization		(7,089	)		(1,152	)		(1,777	)		(10,018	)
Net	$	3,545		$	4,606		$	5,433		$	13,584

Useful Life of Amortizable Intangible Assets Charged Against Earnings

The Company’s amortizable intangible assets are charged against earnings over the following periods:

	Content		Trade Name		Customer Relationships
Useful Life (Years)		1.5		5		4

Estimated Future Amortization Expense by Year from Amortizable Intangibles

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

2011 (remaining six months)	$	1,483
2012		2,955
2013		2,955
2014		1,144
	$	8,537