Segment Information (Tables)

6 Months Ended

Jun. 30, 2014

Segment Reporting [Abstract]

Schedule of segment reporting information, by segment

The following tables present information about the Company’s reportable segments for the periods indicated (in thousands):

Three Months Ended June 30, 2014	Research		Consulting		Events		Consolidated
Revenues	$	358,495	$	93,488	$	67,837	$	519,820
Gross contribution	248,263		36,235		34,232		318,730
Corporate and other expenses							(236,969		)
Operating income							$	81,761

Three Months Ended June 30, 2013	Research		Consulting		Events		Consolidated
Revenues	$	311,233	$	85,928	$	48,886	$	446,047
Gross contribution	213,411		33,185		23,114		269,710
Corporate and other expenses							(195,723		)
Operating income							$	73,987

Six Months Ended June 30, 2014	Research		Consulting		Events		Consolidated
Revenues	$	706,609	$	177,759	$	82,154	$	966,522
Gross contribution	494,365		66,573		37,195		598,133
Corporate and other expenses							(457,202		)
Operating income							$	140,931

Six Months Ended June 30, 2013	Research		Consulting		Events		Consolidated
Revenues	$	621,564	$	158,561	$	72,676	$	852,801
Gross contribution	428,625		55,722		30,222		514,569
Corporate and other expenses							(386,577		)
Operating income							$	127,992

Schedule of reconciliation of segment gross contribution to net income

The following table provides a reconciliation of total segment gross contribution to net income for the periods indicated (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2014		2013		2014		2013
Total segment gross contribution	$	318,730	$	269,710	$	598,133	$	514,569
Costs and expenses:
Cost of services and product development - unallocated (1)	2,088		1,567		5,610		3,409
Selling, general and administrative	218,537		185,629		423,154		366,107
Depreciation and amortization	9,700		8,421		18,438		16,855
Acquisition and integration charges	6,644		106		10,000		206
Operating income	81,761		73,987		140,931		127,992
Interest expense and other	2,505		2,424		4,984		4,649
Provision for income taxes	26,216		25,049		45,171		40,154
Net income	$	53,040	$	46,514	$	90,776	$	83,189

(1) The unallocated amounts consist of certain bonus and related fringe costs recorded in Consolidated cost of services and product development expense that are not allocated to segment expense. The Company's policy is to only allocate bonus and related fringe charges to segments for up to 100% of the segment employee's target bonus. Amounts above 100% are absorbed by corporate.