Operating Segments (Tables)

9 Months Ended

Sep. 30, 2014

Segment Reporting [Abstract]

Summary of Information about Reportable Segments

						Project
	Products		Research			Consulting		Consolidated
Three Months Ended September 30, 2014
Research services revenues	$	50,622	$	—		$	—	$	50,622
Advisory services and events revenues		2,310		10,925			11,506		24,741
Total segment revenues		52,932		10,925			11,506		75,363
Segment expenses		8,298		13,012			7,590		28,900
Contribution margin (loss)		44,634		(2,087	)		3,916		46,463
Selling, marketing, administrative and other expenses									(41,079	)
Amortization of intangible assets									(530	)
Reorganization credits									71
Other income and gains (losses) on investments									127
Income before income taxes								$	5,052

						Project
	Products		Research			Consulting		Consolidated
Three Months Ended September 30, 2013
Research services revenues	$	49,855	$	—		$	—	$	49,855
Advisory services and events revenues		2,167		12,781			5,012		19,960
Total segment revenues		52,022		12,781			5,012		69,815
Segment expenses		7,408		14,420			4,196		26,024
Contribution margin (loss)		44,614		(1,639	)		816		43,791
Selling, marketing, administrative and other expenses									(38,933	)
Amortization of intangible assets									(557	)
Reorganization costs									—
Other income and gains (losses) on investments									(53	)
Income before income taxes								$	4,248
						Project
	Products		Research			Consulting		Consolidated
Nine Months Ended September 30, 2014
Research services revenues	$	153,737	$	—		$	—	$	153,737
Advisory services and events revenues		15,161		37,573			24,910		77,644
Total segment revenues		168,898		37,573			24,910		231,381
Segment expenses		28,543		40,386			19,705		88,634
Contribution margin (loss)		140,355		(2,813	)		5,205		142,747
Selling, marketing, administrative and other expenses									(127,300	)
Amortization of intangible assets									(1,605	)
Reorganization costs									(1,817	)
Other income and gains (losses) on investments									222
Income before income taxes								$	12,247
						Project
	Products		Research			Consulting		Consolidated
Nine Months Ended September 30, 2013
Research services revenues	$	151,445	$	—		$	—	$	151,445
Advisory services and events revenues		13,868		42,531			12,285		68,684
Total segment revenues		165,313		42,531			12,285		220,129
Segment expenses		25,902		43,006			11,169		80,077
Contribution margin (loss)		139,411		(475	)		1,116		140,052
Selling, marketing, administrative and other expenses									(119,108	)
Amortization of intangible assets									(1,670	)
Reorganization costs									(1,905	)
Other income and gains (losses) on investments									476
Income before income taxes								$	17,845