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Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of goodwill by segment

The following table presents the details of goodwill by segment:

(in thousands)		Market Making				Execution Services				Corporate				Total
Balance as of December 31, 2018		$	755,292			$	81,291			$	—			$	836,583
Goodwill recognized in ITG Acquisition		—				357,334				—				357,334
Currency translation adjustment		—				(220		)		$	—			(220		)
Balance as of March 31, 2019		$	755,292			$	438,405			$	—			$	1,193,697

Schedule of acquired intangible assets

Acquired intangible assets consisted of the following as of March 31, 2019 and December 31, 2018:

		As of March 31, 2019
(in thousands)		Gross Carrying Amount				Accumulated Amortization				Net Carrying Amount				Useful Lives (Years)
Purchased technology		$	110,000			$	110,000			$	—			1.4	to	2.5
ETF issuer relationships		950				691				259					9
ETF buyer relationships		950				691				259					9
Technology		153,000				36,538				116,462				1	to	6
Customer relationships		432,000				10,238				421,762				10	to	12
Trade name		3,600				100				3,500					3
Favorable occupancy leases		5,895				1,428				4,467				3	to	15
Exchange memberships		5,838				—				5,838				Indefinite
		$	712,233			$	159,686			$	552,547

		As of December 31, 2018
(in thousands)		Gross Carrying Amount				Accumulated Amortization				Net Carrying Amount				Useful Lives (Years)
Purchased technology		$	110,000			$	110,000			$	—			1.4	to	2.5
ETF issuer relationships		950				665				285					9
ETF buyer relationships		950				665				285					9
Technology		60,000				30,185				29,815				1	to	6
Customer relationships		49,000				5,905				43,095					12
Favorable occupancy leases		5,895				1,224				4,671				3	to	15
Exchange memberships		5,838				—				5,838				Indefinite
		$	232,633			$	148,644			$	83,989

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- References

No definition available.

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- Definition

Tabular disclosure of the characteristics, including initial carrying value, residual amount, weighted average useful life, of finite-lived intangible assets acquired during the period by major class. A major class is composed of intangible assets that can be grouped together because they are similar, either by nature or by their use in the operations of the company.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

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- Definition

Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13854-109267

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