XML 87 R74.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Financing Agreements - Borrowings Under Repurchase Agreement And Associated Assets Pledged as Collateral (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Repurchase Agreements |  |
Fair value of securities pledged as collateral under financing agreements | $ 8,019,405 | $ 5,799,786
Mark-to-market financing agreements secured by residential whole loans |  |
Repurchase Agreements |  |
Fair value of securities pledged as collateral under financing agreements | 2,629,919 | 4,140,961
Mark-to-market financing agreements secured by residential whole loans | Fair Value |  |
Repurchase Agreements |  |
Carrying Value | 2,391,602 | 1,113,553
Fair value of securities pledged as collateral under financing agreements | $ 3,301,288 | $ 1,798,813
Weighted average haircut rate | 25.27% | 34.17%
Mark-to-market financing agreements secured by securities at fair value | Fair Value |  |
Repurchase Agreements |  |
Carrying Value | $ 159,148 | $ 213,915
Fair value of securities pledged as collateral under financing agreements | $ 256,685 | $ 399,999
Weighted average haircut rate | 37.00% | 41.16%
Mark-to-market financing agreements secured by real estate owned |  |
Repurchase Agreements |  |
Fair value of securities pledged as collateral under financing agreements | $ 90,445 | $ 49,477
Mark-to-market financing agreements secured by real estate owned | Fair Value |  |
Repurchase Agreements |  |
Carrying Value | 11,549 | 10,609
Fair value of securities pledged as collateral under financing agreements | $ 34,606 | $ 22,525
Weighted average haircut rate | 58.46% | 55.56%
Non-mark-to-market financing secured by residential whole loans | Fair Value |  |
Repurchase Agreements |  |
Carrying Value | $ 928,055 | $ 1,156,125
Fair value of securities pledged as collateral under financing agreements | $ 1,420,283 | $ 1,930,283
Weighted average haircut rate | 29.98% | 39.46%
Non-mark-to-market financing secured by real estate owned | Fair Value |  |
Repurchase Agreements |  |
Carrying Value | $ 11,485 | $ 3,088
Fair value of securities pledged as collateral under financing agreements | $ 29,894 | $ 7,441
Weighted average haircut rate | 61.28% | 59.73%
Loan Securitization |  |
Repurchase Agreements |  |
Fair value of securities pledged as collateral under financing agreements |  | $ 141,900

X
- Definition The weighted average percentage amount by which the collateral value is contractually required to exceed the loan amount on the Company's repurchase agreements borrowings. + References No definition available. + Details
Name: | mfa_HaircutOnSecuritiesWeightedAveragePercentage
Namespace Prefix: | mfa_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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 No definition available. + Details
Name: | us-gaap_AssetsSoldUnderAgreementsToRepurchaseLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The fair value, as of the date of each statement of financial position presented, of securities which are owned but transferred to serve as collateral for the payment of repurchase agreements, and that are reclassified and separately reported in the statement of financial position because the transferee has the right by contract or custom to sell or re-pledge them. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66007379&loc=d3e113888-111728 + Details
Name: | us-gaap_PledgedAssetsSeparatelyReportedSecuritiesPledgedForRepurchaseAgreementsAtFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, after the effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(m)(1)(i)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(m)(1)(ii)(A)(i)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13(1)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
Name: | us-gaap_SecuritiesSoldUnderAgreementsToRepurchase
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_LoansReceivableMember
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_FinancialInstrumentAxis=mfa_MarkToMarketFinancingAgreementsSecuredBySecuritiesAtFairValueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=mfa_RealEstateOwnedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=mfa_NonMarktoMarketFinancingFacilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=mfa_NonMarkToMarketFinancingSecuredByRealEstateOwnedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=mfa_LoanSecuritizationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |