Segment Information (Tables)

6 Months Ended

Jun. 30, 2018

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, 2018	Research		Events		Consulting		Other		Consolidated
Revenues	$	770,314	$	111,253	$	96,458	$	23,311	$	1,001,336
Gross contribution	532,910		63,461		33,693		15,104		645,168
Corporate and other expenses									(559,072		)
Operating income									$	86,096

Three Months Ended June 30, 2017	Research		Events		Consulting		Other		Consolidated
Revenues	$	613,732	$	91,205	$	91,693	$	47,101	$	843,731
Gross contribution	400,571		49,735		31,433		17,297		499,036
Corporate and other expenses									(597,424		)
Operating loss									$	(98,388	)

Six Months Ended June 30, 2018	Research		Events		Consulting		Other		Consolidated
Revenues	$	1,534,238	$	157,340	$	179,354	$	93,969	$	1,964,901
Gross contribution	1,064,367		79,651		57,817		58,148		1,259,983
Corporate and other expenses									(1,182,598		)
Operating income									$	77,385

Six Months Ended June 30, 2017	Research		Events		Consulting		Other		Consolidated
Revenues	$	1,125,038	$	126,474	$	170,287	$	47,101	$	1,468,900
Gross contribution	751,684		63,302		55,370		17,297		887,653
Corporate and other expenses									(932,527		)
Operating loss									$	(44,874	)

Schedule of reconciliation of segment gross contribution to net income (loss)

The following table provides a reconciliation of total segment gross contribution to net income (loss) (in thousands):

	Three Months Ended					Six Months Ended
	June 30,					June 30,
	2018		2017			2018		2017
Total segment gross contribution	$	645,168	$	499,036		$	1,259,983	$	887,653
Costs and expenses:
Cost of services and product development - unallocated (1)	11,469		7,309			19,928		8,366
Selling, general and administrative	460,803		408,226			948,548		712,470
Depreciation and amortization	66,838		83,557			134,894		100,087
Acquisition and integration charges	19,962		98,332			79,228		111,604
Operating income (loss)	86,096		(98,388		)	77,385		(44,874		)
Interest expense and other, net	36,484		44,363			70,644		49,380
Gain from divested operations	25,460		—			25,460		—
Provision (benefit) for income taxes	28,802		(50,470		)	5,518		(38,406		)
Net income (loss)	$	46,270	$	(92,281	)	$	26,683	$	(55,848	)

(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.