Related Party Transactions - Additional Information (Details)	3 Months Ended
	Mar. 31, 2022 USD ($) subsidiary	Mar. 31, 2021 USD ($)
NexPoint Real Estate Advisors, L.P
Related Party Transaction [Line Items]
Percentage of annual advisory, paid monthly	1.00%
Percentage of annual administrative fee, paid monthly	0.20%
Advisory and administrative fees on contributed assets	$ 5,400,000
Advisory and administrative fees percentage	1.20%
Advisory and administrative fees	$ 1,800,000	$ 1,900,000
Advisory and administrative fees waived	4,900,000	$ 4,000,000.0
NexPoint Real Estate Advisors, L.P | Maximum
Related Party Transaction [Line Items]
Advisory and administrative fees on contributed assets	$ 5,400,000
Corporate general and administrative expenses and advisory and administrative fees percentage	1.50%
NLMF Holdco LLC
Related Party Transaction [Line Items]
Property owning subsidiaries | subsidiary	3
Equity interest owned	10.00%
Amount funded to related party included in prepaid and other assets	$ 300,000
Expenses incurred for fiber internet service included in property operating expenses	$ 100,000