Noncontrolling Interests - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
Mar. 31, 2023	Sep. 08, 2021
Class A OP Units
Noncontrolling Interest [Line Items]
Limited liability units, voting power, percent per share		50000.00%
Class B OP Units
Noncontrolling Interest [Line Items]
Limited liability units, voting power, percent per share	50.00%	50000.00%
NexPoint Real Estate Finance Operating Partnership, L.P.
Noncontrolling Interest [Line Items]
Limited partnership, ownership interest	83.41%
NexPoint Real Estate Finance Operating Partnership, L.P. \| Class A OP Units
Noncontrolling Interest [Line Items]
Limited partnership, ownership interest	100.00%
Manager Affiliates \| Subscription Agreements \| NexPoint Real Estate Finance Operating Partnership, L.P.
Noncontrolling Interest [Line Items]
Partners' capital, distribution amount per share (in dollars per share)	$ 15.27
Weighted average limited partnership units outstanding, basic (in shares)	5,038,382
Partners' capital account, redemptions	$ 76.9

The percent voting power per share of limited liability units.

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- Definition

Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Total change in each class of partners' capital accounts during the year due to redemptions and adjustments to redemption value. All partners include general, limited and preferred partners.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 5
-Subparagraph (SAB Topic 4.F)
-URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187171-122770

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- Definition

The distribution amount per share for all classes of units.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 5
-Subparagraph (SAB TOPIC 4.F)
-URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187171-122770

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- Definition

Weighted average number of limited partnership units outstanding determined by relating the portion of time within a reporting period that limited partnership units have been outstanding to the total time in that period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 5
-Subparagraph (SAB Topic 4.F)
-URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187171-122770

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