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Related Party Transactions - Other Related Party Transactions (Details) $ in Thousands			3 Months Ended		6 Months Ended
	Sep. 01, 2023 Company shares	Jan. 01, 2014 USD ($)	Jun. 30, 2026 USD ($) shares	Jun. 30, 2025 USD ($) shares	Jun. 30, 2026 USD ($) shares	Jun. 30, 2025 USD ($) shares	Jun. 11, 2026 USD ($) shares	Apr. 03, 2026 USD ($)	Jan. 16, 2026 USD ($)	Dec. 31, 2025 shares	Dec. 18, 2025 USD ($) shares	Jun. 16, 2025 USD ($) shares	Apr. 29, 2025 USD ($) shares	Mar. 14, 2025 USD ($) shares	Feb. 15, 2022 USD ($)
Related Party Transaction [Line Items]
Outstanding Principal Balance															$ 39,300
Common stock, shares, issued (in shares) \| shares			53,106,027	47,421,929	53,106,027	47,421,929				50,132,605
Number of company owned \| Company	1
Preferred Class A \| NexAnnuity Holdings, Inc.
Related Party Transaction [Line Items]
Stock issued during period, new issues (in shares) \| shares	68,500				74,028	72,718
NexPoint Real Estate Finance Operating Partnership, L.P. \| Secured Promissory Note
Related Party Transaction [Line Items]
Additional principal amount									$ 962,000
NexPoint Storage Partners Operating Company, LLC
Related Party Transaction [Line Items]
Percentage of ownership			33.69%		33.69%
Interest Rate								14.00%
Outstanding Principal Balance								$ 22,700
Number of shares purchased (in shares) \| shares												5,157.67	4,638.07	2,754.59
Aggregate amount												$ 3,600	$ 3,200	$ 2,000
NexPoint Storage Partners Operating Company, LLC \| Common Class B
Related Party Transaction [Line Items]
Common stock, shares, issued (in shares) \| shares			59,614.68		59,614.68
NexPoint Storage Partners Operating Company, LLC \| Maximum
Related Party Transaction [Line Items]
Additional principal amount								$ 40,000
NSP
Related Party Transaction [Line Items]
Percentage of ownership			54.51%		54.51%
Common stock, shares, issued (in shares) \| shares			91,945.7		91,945.7		2,580.51				2,996.19
Aggregate amount							$ 1,500				$ 1,900
Property Management Fees \| Cityplace \| Reimbursements Member
Related Party Transaction [Line Items]
Cityplace Tower reimbursed			$ 400	$ 400	$ 800	$ 800
Property Management Fees \| NexVest Realty Advisors
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party			200	$ 200	$ 300	$ 400
Related party transaction, monthly expenses from transactions with related party		$ 1,200
Property Management Fees \| NexVest Realty Advisors \| Cityplace
Related Party Transaction [Line Items]
Management fee, percent					3.00%
Minimum management fee			$ 20,000		$ 20,000
Property Management Fees \| NexVest Realty Advisors \| White Rock Center
Related Party Transaction [Line Items]
Management fee, percent					4.00%
Property Management Fees \| NexVest Realty Advisors \| Undeveloped Land in Plano, Texas
Related Party Transaction [Line Items]
Management fee, percent					3.00%
Guarantor on Loans
Related Party Transaction [Line Items]
Percentage of beneficiary trust indirectly owns			100.00%		100.00%
Percentage directly owns general partnership interests			100.00%		100.00%
Guarantor on Loans \| White Rock Center
Related Party Transaction [Line Items]
Additional principal amount			$ 10,000		$ 10,000
Management Fee \| NexVest Realty Advisors \| Cityplace
Related Party Transaction [Line Items]
Minimum management fee			$ 750		$ 750