XML 84 R73.htm IDEA: XBRL DOCUMENT v3.25.3

Financing Agreements - Financing Agreements (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2025	Dec. 31, 2024	Apr. 17, 2024	Jan. 31, 2024
Financing Agreements [Line Items]
Unpaid Principal Balance	$ 9,891,104	$ 9,259,637
Fair Value / Carrying Value	$ 9,841,991	$ 9,155,461
Weighted Average Cost of Funding (in Percent)	4.64%	4.47%
Secured debt | Estimated Fair Value
Financing Agreements [Line Items]
Fair Value / Carrying Value		$ 5,200,000
Weighted Average Cost of Funding (in Percent)	(0.65%)	(1.07%)
Financing agreements, amortized cost	$ 5,800,000	$ 5,300,000
Senior notes | 8.875% Senior Notes due 2029
Financing Agreements [Line Items]
Stated interest rate (as a percent)	8.875%	8.875%		8.875%
Unpaid Principal Balance	$ 115,000	$ 115,000
Fair Value / Carrying Value	$ 111,841	$ 111,270
Weighted Average Cost of Funding (in Percent)	9.83%	9.83%
Weighted Average Term to Maturity (Months)	3 years 4 months 17 days	4 years 1 month 13 days
Senior notes | 9.00% Senior Notes due 2029
Financing Agreements [Line Items]
Stated interest rate (as a percent)	9.00%	9.00%	9.00%
Unpaid Principal Balance	$ 75,000	$ 75,000
Fair Value / Carrying Value	$ 72,736	$ 72,390
Weighted Average Cost of Funding (in Percent)	9.94%	9.94%
Weighted Average Term to Maturity (Months)	3 years 10 months 13 days	4 years 7 months 13 days
Residential whole loans | Secured debt
Financing Agreements [Line Items]
Unpaid Principal Balance	$ 6,396,928	$ 5,891,815
Fair Value / Carrying Value	$ 6,353,974	$ 5,794,977
Weighted Average Cost of Funding (in Percent)	5.12%	4.98%
Residential whole loans | Secured debt | Held at Fair Value
Financing Agreements [Line Items]
Fair Value / Carrying Value	$ 5,800,000
Other | Other secured financing
Financing Agreements [Line Items]
Unpaid Principal Balance	9,035
Fair Value / Carrying Value	$ 9,035
Weighted Average Cost of Funding (in Percent)	6.94%
Weighted Average Term to Maturity (Months)	4 years 8 months 19 days
Unpaid principal balance, with 60-day call provision	$ 5,000
Agreements with mark-to-market collateral provisions
Financing Agreements [Line Items]
Unpaid Principal Balance	3,128,898	$ 2,600,591
Fair Value / Carrying Value	$ 3,128,279	$ 2,600,050
Weighted Average Cost of Funding (in Percent)	5.25%	6.01%
Agreements with mark-to-market collateral provisions | 0-3 Months
Financing Agreements [Line Items]
Unpaid Principal Balance	$ 2,466,392
Agreements with mark-to-market collateral provisions | 3-6 Months
Financing Agreements [Line Items]
Unpaid Principal Balance	111,768
Agreements with mark-to-market collateral provisions | 6-12 Months
Financing Agreements [Line Items]
Unpaid Principal Balance	316,774
Fair Value / Carrying Value	$ 191,200
Extension period	1 year
Agreements with mark-to-market collateral provisions | 6-12 Months | Maximum
Financing Agreements [Line Items]
Extension period	48 months
Agreements with mark-to-market collateral provisions | Greater than 12 Months
Financing Agreements [Line Items]
Unpaid Principal Balance	$ 233,964
Fair Value / Carrying Value	2,400,000
Agreements with mark-to-market collateral provisions | Estimated Fair Value
Financing Agreements [Line Items]
Financing agreements, amortized cost	65,600	$ 284,800
Agreements with mark-to-market collateral provisions | Held at Fair Value | Estimated Fair Value
Financing Agreements [Line Items]
Fair Value / Carrying Value		284,800
Agreements with mark-to-market collateral provisions | Residential whole loans and REO
Financing Agreements [Line Items]
Unpaid Principal Balance	1,250,481	1,321,584
Fair Value / Carrying Value	$ 1,249,862	$ 1,321,043
Weighted Average Cost of Funding (in Percent)	6.08%	6.72%
Weighted Average Term to Maturity (Months)	9 months 7 days	7 months 28 days
Agreements with mark-to-market collateral provisions | Securities
Financing Agreements [Line Items]
Unpaid Principal Balance	$ 1,878,417	$ 1,279,007
Fair Value / Carrying Value	$ 1,878,417	$ 1,279,007
Weighted Average Cost of Funding (in Percent)	4.50%	5.02%
Weighted Average Term to Maturity (Months)	10 days	7 days
Agreements with mark-to-market collateral provisions | Securities | 0-3 Months
Financing Agreements [Line Items]
Unpaid Principal Balance	$ 1,878,417
Agreements with mark-to-market collateral provisions | Securities | 3-6 Months
Financing Agreements [Line Items]
Unpaid Principal Balance	0
Agreements with mark-to-market collateral provisions | Securities | 6-12 Months
Financing Agreements [Line Items]
Unpaid Principal Balance	0
Agreements with mark-to-market collateral provisions | Securities | Greater than 12 Months
Financing Agreements [Line Items]
Unpaid Principal Balance	0
Agreements with mark-to-market collateral provisions | Residential whole loans
Financing Agreements [Line Items]
Unpaid Principal Balance	1,250,481
Agreements with mark-to-market collateral provisions | Residential whole loans | 0-3 Months
Financing Agreements [Line Items]
Unpaid Principal Balance	587,975
Agreements with mark-to-market collateral provisions | Residential whole loans | 3-6 Months
Financing Agreements [Line Items]
Unpaid Principal Balance	111,768
Agreements with mark-to-market collateral provisions | Residential whole loans | 6-12 Months
Financing Agreements [Line Items]
Unpaid Principal Balance	316,774
Agreements with mark-to-market collateral provisions | Residential whole loans | Greater than 12 Months
Financing Agreements [Line Items]
Unpaid Principal Balance	233,964
Agreements with mark-to-market collateral provisions | Residential whole loans | Not Held at Fair Value
Financing Agreements [Line Items]
Fair Value / Carrying Value	65,600
Agreements with non-mark-to-market collateral provisions | Estimated Fair Value
Financing Agreements [Line Items]
Fair Value / Carrying Value		$ 19,800
Financing agreements, amortized cost	39,700	19,800
Agreements with non-mark-to-market collateral provisions | Residential whole loans and REO
Financing Agreements [Line Items]
Unpaid Principal Balance	166,243	577,231
Fair Value / Carrying Value	$ 166,126	$ 576,774
Weighted Average Cost of Funding (in Percent)	6.93%	7.31%
Weighted Average Term to Maturity (Months)	1 year 11 months 4 days	10 months 13 days
Agreements with non-mark-to-market collateral provisions | Residential whole loans
Financing Agreements [Line Items]
Unpaid Principal Balance	$ 166,243
Agreements with non-mark-to-market collateral provisions | Residential whole loans | 0-3 Months
Financing Agreements [Line Items]
Unpaid Principal Balance	79,026
Agreements with non-mark-to-market collateral provisions | Residential whole loans | 3-6 Months
Financing Agreements [Line Items]
Unpaid Principal Balance	0
Agreements with non-mark-to-market collateral provisions | Residential whole loans | 6-12 Months
Financing Agreements [Line Items]
Unpaid Principal Balance	0
Agreements with non-mark-to-market collateral provisions | Residential whole loans | Greater than 12 Months
Financing Agreements [Line Items]
Unpaid Principal Balance	87,217
Agreements with non-mark-to-market collateral provisions | Residential whole loans | Held at Fair Value
Financing Agreements [Line Items]
Fair Value / Carrying Value	$ 39,700
Impact of net Swap carry
Financing Agreements [Line Items]
Weighted Average Cost of Funding (in Percent)	(0.65%)	(1.07%)

X

- Definition

Financing Agreement, Extension Period

+ References

No definition available.

+ Details

Name:	mfa_FinancingAgreementExtensionPeriod
Namespace Prefix:	mfa_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Financing Agreements, Amortized Cost

+ References

No definition available.

+ Details

Name:	mfa_FinancingAgreementsAmortizedCost
Namespace Prefix:	mfa_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Financing Agreements, Fair Value And Carrying Value

+ References

No definition available.

+ Details

Name:	mfa_FinancingAgreementsFairValueAndCarryingValue
Namespace Prefix:	mfa_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

[Line Items] for Financing Agreements [Table]

+ References

No definition available.

+ Details

Name:	mfa_FinancingAgreementsLineItems
Namespace Prefix:	mfa_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Financing Agreements, Unpaid Principal Balance

+ References

No definition available.

+ Details

Name:	mfa_FinancingAgreementsUnpaidPrincipalBalance
Namespace Prefix:	mfa_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Financing Agreements, Unpaid Principal Balance, With Call Provision

+ References

No definition available.

+ Details

Name:	mfa_FinancingAgreementsUnpaidPrincipalBalanceWithCallProvision
Namespace Prefix:	mfa_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Financing Agreements, Weighted Average Term To Maturity

+ References

No definition available.

+ Details

Name:	mfa_FinancingAgreementsWeightedAverageTermToMaturity
Namespace Prefix:	mfa_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(a)(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByMeasurementBasisAxis=us-gaap_EstimateOfFairValueFairValueDisclosureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=mfa_A8.875SeniorNotesDue2029Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=mfa_A9.00SeniorNotesDue2029Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=mfa_HeldAtFairValueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CollateralAxis=mfa_OtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=mfa_OtherSecuredFinancingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	mfa_AssetsSoldUnderAgreementsToRepurchaseRemainingPeriodBeforeInterestRateResetAxis=mfa_UnpaidPrincipalBalanceMaturingIn03MonthsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	mfa_AssetsSoldUnderAgreementsToRepurchaseRemainingPeriodBeforeInterestRateResetAxis=mfa_UnpaidPrincipalBalanceMaturingIn36MonthsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	mfa_AssetsSoldUnderAgreementsToRepurchaseRemainingPeriodBeforeInterestRateResetAxis=mfa_UnpaidPrincipalBalanceMaturingIn612MonthsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	mfa_AssetsSoldUnderAgreementsToRepurchaseRemainingPeriodBeforeInterestRateResetAxis=mfa_UnpaidPrincipalBalanceMaturingInGreaterThan12MonthsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CollateralAxis=mfa_ResidentialWholeLoansAndREOMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CollateralAxis=mfa_SecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=mfa_NotHeldAtFairValueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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