Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2017

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Goodwill by Reportable Segment

The following table presents goodwill by reportable segment:

(in thousands)	Index		Analytics		All Other		Total
Goodwill at December 31, 2016	$	1,202,448	$	302,611	$	50,791	$	1,555,850
Foreign exchange translation adjustment		373		—		230		603
Goodwill at March 31, 2017	$	1,202,821	$	302,611	$	51,021	$	1,556,453

Schedule of Gross Carrying and Accumulated Amortization Amounts Related to Company's Identifiable Intangible Assets

The gross carrying and accumulated amortization amounts related to the Company’s identifiable intangible assets were as follows: 

	As of
	March 31,			December 31,
	2017			2016
	(in thousands)
Gross intangible assets:
Customer relationships	$	361,199		$	361,199
Trademarks/trade names		223,382			223,382
Technology/software		212,261			210,013
Proprietary data		28,627			28,627
Covenant not to compete		1,225			1,225
Subtotal		826,694			824,446
Foreign exchange translation adjustment		(13,311	)		(13,946	)
Total gross intangible assets	$	813,383		$	810,500
Accumulated amortization:
Customer relationships	$	(172,464	)	$	(166,923	)
Trademarks/trade names		(107,975	)		(105,077	)
Technology/software		(186,633	)		(184,290	)
Proprietary data		(8,999	)		(8,571	)
Covenant not to compete		(1,131	)		(1,089	)
Subtotal		(477,202	)		(465,950	)
Foreign exchange translation adjustment		2,926			3,090
Total accumulated amortization	$	(474,276	)	$	(462,860	)
Net intangible assets:
Customer relationships	$	188,735		$	194,276
Trademarks/trade names		115,407			118,305
Technology/software		25,628			25,723
Proprietary data		19,628			20,056
Covenant not to compete		94			136
Subtotal		349,492			358,496
Foreign exchange translation adjustment		(10,385	)		(10,856	)
Total net intangible assets	$	339,107		$	347,640

Estimated Amortization Expense for Remainder of 2017 and Succeeding Years

The following table presents the estimated amortization expense for the remainder of 2017 and succeeding years:

Years Ending December 31,	Amortization Expense
	(in thousands)
Remainder 2017	$	32,818
2018		42,074
2019		40,074
2020		37,889
2021		36,376
Thereafter		149,876
Total	$	339,107