Segment Information (Tables)

3 Months Ended

Mar. 31, 2017

Segment Reporting [Abstract]

Operating Revenue by Reportable Segment

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

	Three Months Ended
	March 31,
	2017		2016
	(in thousands)
Operating revenues
Index	$	163,435	$	144,613
Analytics		112,420		110,263
All Other		25,352		23,952
Total	$	301,207	$	278,828

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
	March 31,
	2017		2016
	(in thousands)
Index Adjusted EBITDA	$	115,637	$	100,049
Analytics Adjusted EBITDA		29,536		30,360
All Other Adjusted EBITDA		5,518		2,740
Total operating segment profitability		150,691		133,149
Amortization of intangible assets		11,251		11,840
Depreciation and amortization of property,    equipment and leasehold improvements		8,838		8,168
Operating income		130,602		113,141
Other expense (income), net		28,977		22,364
Provision for income taxes		28,674		30,410
Net income	$	72,951	$	60,367

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 by geographic area for the periods indicated:

	Three Months Ended
	March 31,
		2017		2016
	(in thousands)
Revenues
Americas:
United States	$	144,838	$	137,645
Other		11,654		10,582
Total Americas		156,492		148,227
Europe, the Middle East and Africa ("EMEA"):
United Kingdom		47,025		42,610
Other		60,302		53,439
Total EMEA		107,327		96,049
Asia & Australia:
Japan		12,826		12,640
Other		24,562		21,912
Total Asia & Australia		37,388		34,552
Total	$	301,207	$	278,828

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
	March 31,		December 31,
	2017		2016
	(in thousands)
Long-lived assets
Americas:
United States	$	1,864,169	$	1,876,366
Other		1,891		1,543
Total Americas		1,866,060		1,877,909
EMEA:
United Kingdom		89,468		89,466
Other		25,026		23,780
Total EMEA		114,494		113,246
Asia & Australia:
Japan		327		357
Other		7,835		7,563
Total Asia & Australia		8,162		7,920
Total	$	1,988,716	$	1,999,075