Operating Segment and Enterprise Wide Reporting (Tables)

12 Months Ended

Dec. 31, 2014

Segment Reporting [Abstract]

Summary of Information about Reportable Segments

The following tables present information about reportable segments (in thousands):

	Products		Research			Project Consulting		Consolidated
Year Ended December 31, 2014
Research services revenues	$	207,517	$	—		$	—	$	207,517
Advisory services and events revenues		20,759		48,658			35,128		104,545
Total segment revenues		228,276		48,658			35,128		312,062
Segment expenses		39,466		53,307			27,236		120,009
Contribution margin (loss)		188,810		(4,649	)		7,892		192,053
Selling, marketing, administrative and other expenses									(169,852	)
Amortization of intangible assets									(2,171	)
Reorganization costs									(1,817	)
Other income and gains (losses) on investments									176
Income before income taxes								$	18,389
Year Ended December 31, 2013
Research services revenues	$	202,843	$	—		$	—	$	202,843
Advisory services and events revenues		19,376		57,865			17,566		94,807
Total segment revenues		222,219		57,865			17,566		297,650
Segment expenses		36,384		58,685			15,700		110,769
Contribution margin (loss)		185,835		(820	)		1,866		186,881
Selling, marketing, administrative and other expenses									(160,913	)
Amortization of intangible assets									(2,230	)
Reorganization costs									(1,905	)
Other income and gains (losses) on investments									(1,841	)
Income before income taxes								$	19,992
	Products		Research			Project Consulting		Consolidated
Year Ended December 31, 2012
Research services revenues	$	203,091	$	—		$	—	$	203,091
Advisory services and events revenues		17,905		56,928			15,107		89,940
Total segment revenues		220,996		56,928			15,107		293,031
Segment expenses		36,468		57,440			13,109		107,017
Contribution margin (loss)		184,528		(512	)		1,998		186,014
Selling, marketing, administrative and other expenses									(151,388	)
Amortization of intangible assets									(2,445	)
Reorganization costs									(1,421	)
Other income and gains (losses) on investments									1,394
Income before income taxes								$	32,154

Schedule of Net Long-lived Tangible Assets by Location

Net long-lived tangible assets by location as of December 31, 2014 and 2013 are as follows (in thousands):

	2014		2013
United States	$	28,558	$	35,167
United Kingdom		1,625		2,212
Europe (excluding United Kingdom)		329		174
Other		1,662		2,315
	$	32,174	$	39,868

Schedule of Net Revenues by Geographic Destination and as a Percentage of Total Revenues

Net revenues by geographic destination and as a percentage of total revenues for the years ended December 31, 2014, 2013, and 2012 are as follows (in thousands):

	2014		2013		2012
United States	$	232,440	$	218,900	$	211,211
Europe (excluding United Kingdom)		30,257		30,956		33,146
United Kingdom		16,804		16,293		16,555
Canada		17,089		16,995		16,742
Other		15,472		14,506		15,377
	$	312,062	$	297,650	$	293,031

	2014			2013			2012
United States		74	%		74	%		72	%
Europe (excluding United Kingdom)		10	%		10	%		11	%
United Kingdom		5	%		5	%		6	%
Canada		6	%		6	%		6	%
Other		5	%		5	%		5	%
		100	%		100	%		100	%