Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2016

Goodwill and Intangible Assets

Schedule of acquired intangible assets

	As of December 31, 2016
	Gross
	Carrying		Accumulated		Net Carrying		Useful Lives
(in thousands)	Amount		Amortization		Amount		(Years)
Purchased technology	$	110,000	$	110,000	$	—	1.4	to	2.5
ETF issuer relationships		950		454		496		9
ETF buyer relationships		950		454		496		9
	$	111,900	$	110,908	$	992

	As of December 31, 2015
	Gross
	Carrying		Accumulated		Net Carrying		Useful Lives
(in thousands)	Amount		Amortization		Amount		(Years)
Purchased technology	$	110,000	$	110,000	$	—	1.4	to	2.5
ETF issuer relationships		950		349		601		9
ETF buyer relationships		950		348		602		9
	$	111,900	$	110,697	$	1,203