Variable Interest Entities (Details) - VIE	Jun. 30, 2025	Dec. 31, 2024
NexPoint Storage Partners, Inc.
Variable Interest Entity [Line Items]
Effective ownership (as a percent)	52.80%	52.80%
NexPoint Storage Partners Operating Company, LLC
Variable Interest Entity [Line Items]
Effective ownership (as a percent)	35.70%	29.50%
Perilune Aero Equity Holdings One, LLC
Variable Interest Entity [Line Items]
Effective ownership (as a percent)	16.40%	16.40%
Sandstone Pasadena Apartments, LLC
Variable Interest Entity [Line Items]
Effective ownership (as a percent)	50.00%	50.00%
Life Sciences II DST
Variable Interest Entity [Line Items]
Effective ownership (as a percent)	25.80%	25.80%
Semiconductor DST
Variable Interest Entity [Line Items]
Effective ownership (as a percent)	19.20%	16.80%
Capital Acquisitions Partners, LLC
Variable Interest Entity [Line Items]
Effective ownership (as a percent)	20.90%	20.90%
IQHQ Holdings, LP
Variable Interest Entity [Line Items]
Effective ownership (as a percent)	1.10%	1.20%
NexPoint Real Estate Finance Operating Partnership, L.P.
Variable Interest Entity [Line Items]
Effective ownership (as a percent)	15.60%	15.60%
VineBrook Homes Operating Partnership, L.P.
Variable Interest Entity [Line Items]
Effective ownership (as a percent)	11.60%	11.40%
NexPoint SFR Operating Partnership, L.P.
Variable Interest Entity [Line Items]
Effective ownership (as a percent)	30.80%	30.80%
NexAnnuity Holdings, Inc.
Variable Interest Entity [Line Items]
Effective ownership (as a percent)	100.00%	100.00%
NexAnnuity Holdings, Inc. | Series A Preferred Shares
Variable Interest Entity [Line Items]
Effective ownership (as a percent)	100.00%
NexAnnuity Holdings, Inc. | Common stock
Variable Interest Entity [Line Items]
Effective ownership (as a percent)	0.00%
AMS C-Store JV, LLC
Variable Interest Entity [Line Items]
Effective ownership (as a percent)	100.00%
AMS C-Store JV, LLC | Series A Preferred Shares
Variable Interest Entity [Line Items]
Effective ownership (as a percent)	100.00%
AMS C-Store JV, LLC | Common stock
Variable Interest Entity [Line Items]
Effective ownership (as a percent)	0.00%