Commitments and Contingencies (Details) $ in Thousands	Apr. 25, 2016 lawsuit	Apr. 24, 2016 defendant	Mar. 01, 2016 lawsuit	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Other Commitments [Line Items]
Monthly percentage of effective management fee percentage				8.33%
Gross equity raised | $				$ 2,965,163	$ 2,658,969	$ 2,618,020
Transactions Case
Other Commitments [Line Items]
Number of new claims filed			9
Number of defendants, current directors | defendant		8
Number of consolidated claims	1
ARRM
Other Commitments [Line Items]
Percentage of gross equity raised used in calculation of management fee up to 1 Billion				1.50%
Percentage of gross equity raised used in calculation of management fee in excess of 1 Billion				0.75%
Effective management fee				1.00%	1.03%	1.04%