Segment Information (Tables)

9 Months Ended

Sep. 30, 2016

Segment Reporting [Abstract]

Operating Revenue by Reportable Segment

The following table presents operating revenue by the reportable segment for the periods indicated:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2016		2015		2016		2015
	(in thousands)
Operating revenues
Index	$	157,751	$	141,577	$	454,481	$	415,262
Analytics		111,291		108,341		333,947		322,756
All Other		19,391		18,853		69,429		64,102
Total	$	288,433	$	268,771	$	857,857	$	802,120

Segment Profitability and Reconciliation to Net Income

The following table presents segment profitability and a reconciliation to net income for the periods indicated:

	Three Months Ended					Nine Months Ended
	September 30,					September 30,
	2016		2015			2016		2015
	(in thousands)
Index Adjusted EBITDA	$	111,750	$	102,927		$	318,317	$	293,997
Analytics Adjusted EBITDA		31,501		29,216			95,163		64,560
All Other Adjusted EBITDA		73		(3,282	)		9,020		(3,774	)
Total operating segment profitability		143,324		128,861			422,500		354,783
Amortization of intangible assets		11,752		11,710			35,535		35,107
Depreciation and amortization of property,    equipment and leasehold improvements		8,312		8,049			24,873		23,321
Operating income		123,260		109,102			362,092		296,355
Other expense (income), net		25,738		10,060			73,249		32,237
Provision for income taxes		32,241		34,644			96,238		94,079
Income from continuing operations		65,281		64,398			192,605		170,039
Income (loss) from discontinued operations,    net of income taxes		—		—			—		(5,797	)
Net income	$	65,281	$	64,398		$	192,605	$	164,242

Revenue by Geographic Area

Revenue by geography is based on the shipping address of the ultimate customer utilizing the product. The following table presents revenue for the periods indicated by geographic area:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
		2016		2015	2016		2015
	(in thousands)
Revenues
Americas:
United States	$	139,376	$	128,770	$	411,740	$	384,443
Other		11,908		10,817		33,878		31,047
Total Americas		151,284		139,587		445,618		415,490
Europe, the Middle East and Africa ("EMEA"):
United Kingdom		44,689		42,249		131,275		124,645
Other		56,317		52,564		173,191		162,873
Total EMEA		101,006		94,813		304,466		287,518
Asia & Australia:
Japan		13,476		11,283		39,679		33,843
Other		22,667		23,088		68,094		65,269
Total Asia & Australia		36,143		34,371		107,773		99,112
Total	$	288,433	$	268,771	$	857,857	$	802,120

Long-Lived Assets by Geographic Area

Long-lived assets consist of property, equipment, leasehold improvements, goodwill and intangible assets, net of accumulated depreciation and amortization. The following table presents long-lived assets by geographic area on the dates indicated:

	As of
	September 30,		December 31,
	2016		2015
	(in thousands)
Long-lived assets
Americas:
United States	$	1,886,593	$	1,916,689
Other		1,702		2,279
Total Americas		1,888,295		1,918,968
EMEA:
United Kingdom		94,672		110,261
Other		24,637		16,849
Total EMEA		119,309		127,110
Asia & Australia:
Japan		477		570
Other		8,040		9,389
Total Asia & Australia		8,517		9,959
Total	$	2,016,121	$	2,056,037