Operating Segments (Tables)

9 Months Ended

Sep. 30, 2015

Segment Reporting [Abstract]

Schedule of Information about Reportable Segments

						Project
	Products		Research			Consulting		Consolidated
Three Months Ended September 30, 2015
Research services revenues	$	52,205	$	—		$	—	$	52,205
Advisory services and events revenues		2,041		9,804			10,703		22,548
Total segment revenues		54,246		9,804			10,703		74,753
Segment expenses		7,918		12,711			6,811		27,440
Contribution margin (loss)		46,328		(2,907	)		3,892		47,313
Selling, marketing, administrative and other expenses									(40,820	)
Amortization of intangible assets									(224	)
Reorganization (costs) credits									(928	)
Other income and gains (losses) on investments									404
Income before income taxes								$	5,745

						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 (costs) credits									71
Other income and gains (losses) on investments									127
Income before income taxes								$	5,052

						Project
	Products		Research			Consulting		Consolidated
Nine Months Ended September 30, 2015
Research services revenues	$	156,667	$	—		$	—	$	156,667
Advisory services and events revenues		12,763		31,454			31,867		76,084
Total segment revenues		169,430		31,454			31,867		232,751
Segment expenses		27,799		38,467			20,544		86,810
Contribution margin (loss)		141,631		(7,013	)		11,323		145,941
Selling, marketing, administrative and other expenses									(126,120	)
Amortization of intangible assets									(669	)
Reorganization (costs) credits									(4,433	)
Other income and gains (losses) on investments									578
Income before income taxes								$	15,297

						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) credits									(1,817	)
Other income and gains (losses) on investments									222
Income before income taxes								$	12,247