Segment Information (Tables)

6 Months Ended

Jun. 30, 2013

Segment Reporting [Abstract]

Schedule of segment reporting information, by segment

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

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

Three Months Ended June 30, 2012	Research		Consulting		Events		Consolidated
Revenues	$	278,302	$	76,676	$	42,504	$	397,482
Gross contribution	189,471		27,906		20,394		237,771
Corporate and other expenses							(175,049		)
Operating income							$	62,722

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

Six Months Ended June 30, 2012	Research		Consulting		Events		Consolidated
Revenues	$	552,922	$	151,239	$	62,492	$	766,653
Gross contribution	378,074		55,506		28,289		461,869
Corporate and other expenses							(345,591		)
Operating income							$	116,278

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,
	2013		2012		2013		2012
Total segment gross contribution	$	269,710	$	237,771	$	514,569	$	461,869
Costs and expenses:
Cost of services and product development - unallocated (1)	1,567		1,536		3,409		2,926
Selling, general and administrative	185,629		165,221		366,107		327,739
Depreciation and amortization	8,421		7,110		16,855		13,744
Acquisition and integration charges	106		1,182		206		1,182
Operating income	73,987		62,722		127,992		116,278
Interest expense and other	2,424		2,229		4,649		5,402
Provision for income taxes	25,049		19,009		40,154		35,171
Net income	$	46,514	$	41,484	$	83,189	$	75,705

(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.