Collateralized Transactions (Tables)

12 Months Ended

Dec. 31, 2018

Collateralized Agreements [Abstract]

Summary of the fair value of collateralized transactions

The fair value of the collateralized transactions at December 31, 2018 and December 31, 2017 are summarized as follows:

(in thousands)	December 31, 2018		December 31, 2017
Securities received as collateral:
Securities borrowed	$	1,361,635	$	1,415,793
Securities purchased under agreements to resell	15,475		—
	$	1,377,110	$	1,415,793

Schedule of financial instruments owned and pledged, where counterparty has right to repledge

Financial instruments owned and pledged, where the counterparty has the right to repledge, at December 31, 2018 and December 31, 2017 consisted of the following:

(in thousands)	December 31, 2018		December 31, 2017
Equities	$	748,846	$	586,251
U.S. and Non-U.S. government obligations	—		99
Exchange traded notes	42,269		8,693
	$	791,115	$	595,043