Related Party Master Repurchase Agreement	9 Months Ended
	Sep. 30, 2020
Subsequent Events [Abstract]
Related Party Master Repurchase Agreement	Related Party Master Repurchase AgreementDuring April 2020, we provided a $125 million credit facility, through a Master Repurchase Agreement (“MRA”), to one of our sponsored private investment funds, of which $30 million was drawn upon as of April 28, 2020 and repaid in full in May 2020. No additional amounts were drawn during the third quarter of 2020. The amounts drawn upon the MRA, which are payable on demand, are collateralized by assets of the fund, can be repaid at any time prior to maturity and bear interest based upon the interest rate established at the time of each borrowing.