XML 65 R54.htm IDEA: XBRL DOCUMENT v3.25.3

Residential Whole Loans - Net Gain/(Loss) on Residential Whole Loans Measured at Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gain/(loss) on residential whole loans measured at fair value through earnings	$ 41,293	$ 143,416	$ 129,284	$ 148,333
Residential whole loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gain/(loss) on residential whole loans measured at fair value through earnings	41,293	143,416	129,284	148,333
Residential whole loans | Non-QM loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gain/(loss) on residential whole loans measured at fair value through earnings	31,465	94,489	104,783	124,058
Residential whole loans | Business purpose loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gain/(loss) on residential whole loans measured at fair value through earnings	7,169	26,679	19,985	13,092
Residential whole loans | Business purpose loans | Single-family rental loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gain/(loss) on residential whole loans measured at fair value through earnings	16,878	39,662	45,888	57,269
Residential whole loans | Business purpose loans | Single-family transitional loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gain/(loss) on residential whole loans measured at fair value through earnings	(1,770)	2,401	(16,488)	(1,720)
Residential whole loans | Business purpose loans | Multifamily transitional loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gain/(loss) on residential whole loans measured at fair value through earnings	(7,939)	(15,384)	(9,415)	(42,457)
Residential whole loans | Legacy RPL/NPL loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gain/(loss) on residential whole loans measured at fair value through earnings	1,769	18,923	1,885	9,002
Residential whole loans | Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gain/(loss) on residential whole loans measured at fair value through earnings	$ 890	$ 3,325	$ 2,631	$ 2,181

X

- Definition

Mortgage Loans On Real Estate, Gain (Loss) On Loans Measured At Fair Value

+ References

No definition available.

+ Details

Name:	mfa_MortgageLoansOnRealEstateGainLossOnLoansMeasuredAtFairValue
Namespace Prefix:	mfa_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- 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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
-Section 40
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481628/310-20-40-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

+ Details

Name:	us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=mfa_ResidentialWholeLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=mfa_NonQMLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=mfa_BusinessPurposeLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=mfa_SingleFamilyRentalLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=mfa_SingleFamilyTransitionalLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=mfa_MultiFamilyTransitionalLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=mfa_LegacyReperformingAndNonPerformingLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=mfa_OtherLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: