Acquisition of KCG (Tables)

12 Months Ended

Dec. 31, 2018

Business Combinations [Abstract]

Schedule of preliminary allocation of intangible assets, amortization period and goodwill

Amounts allocated to intangible assets, the amortization period and goodwill were as follows:

(in thousands)	Amount		Amortization Years
Technology	$	67,700	1-6 years
Customer relationships	94,000		13 - 17 years
Trade names	1,000		10 years
Favorable leases	5,895		2-15 years
Exchange memberships	6,400		Indefinite
Intangible assets	$	174,995
Goodwill	128,286
Total	$	303,281