Commitments and Contingencies - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
	May 07, 2021	Mar. 31, 2021	Mar. 31, 2020
Subsidiary, Sale of Stock [Line Items]
Period of notice required for repurchase program termination		15 days
Subsequent event
Subsidiary, Sale of Stock [Line Items]
Monthly redemptions, percent of net asset value, maximum	2.00%
Quarterly redemptions, percent of net asset value, maximum	5.00%
Percent of most recently disclosed net asset value	95.00%
Subsequent event | 5 years
Subsidiary, Sale of Stock [Line Items]
Repurchase price, percent of net asset value required for redemption of shares	95.00%
Holding period	5 years
Subsequent event | 6 Years
Subsidiary, Sale of Stock [Line Items]
Repurchase price, percent of net asset value required for redemption of shares	100.00%
Holding period	6 years
Common Stock
Subsidiary, Sale of Stock [Line Items]
Number of shares redeemed (in shares)		0	0
2019 Preferred Stock
Subsidiary, Sale of Stock [Line Items]
Number of shares redeemed (in shares)		0
Distribution Reinvestment Plan
Subsidiary, Sale of Stock [Line Items]
Share price (in dollars per share)		$ 10.00
B Note | Corporate Joint Venture | Preferred Equity Investment
Subsidiary, Sale of Stock [Line Items]
Investment remaining amount		$ 974
Riverfront | Corporate Joint Venture | Preferred Equity Investment
Subsidiary, Sale of Stock [Line Items]
Investment remaining amount		$ 9,899