XML 61 R50.htm IDEA: XBRL DOCUMENT
v3.21.2

Residential Whole Loans (Allowance for Credit Losses) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Sep. 30, 2021 | Jan. 01, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance | $ 54,261 | $ 63,244 | $ 86,833 | $ 136,589 | $ 218,011 | $ 3,025 | $ 86,833 |
Transition adjustment on adoption of ASU 2016-13 |  |  |  |  |  | 70,555 | 70,600 |
Current provision | (9,626) | (8,583) | (22,372) | (30,062) | (10,614) | 74,897 |  |
Write-offs | (533) | (400) | (1,217) | (281) | (627) | (647) | (2,149) |
Valuation adjustment on loans held for sale |  |  |  |  | (70,181) | 70,181 |  |
Ending balance | 44,102 | 54,261 | 63,244 | 106,246 | 136,589 | 218,011 | 44,102 |
Loans | 3,031,966 |  |  |  |  |  | 3,031,966 |
Allowance for loan loss | 44,102 | 54,261 | 63,244 | 106,246 | 136,589 | 218,011 | 44,102 |
Gross up of the amortized cost basis of Purchased Credit Deteriorated Loans |  |  |  |  |  |  | 62,400 |
Non-QM loans |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance | 12,092 | 14,545 | 21,068 | 31,353 | 103,831 | 388 | 21,068 |
Transition adjustment on adoption of ASU 2016-13 |  |  |  |  |  | 6,904 |  |
Current provision | (2,403) | (2,416) | (6,523) | (4,568) | (2,297) | 26,358 |  |
Write-offs | 0 | (37) | 0 | (32) | 0 | 0 |  |
Valuation adjustment on loans held for sale |  |  |  |  | (70,181) | 70,181 |  |
Ending balance | 9,689 | 12,092 | 14,545 | 26,753 | 31,353 | 103,831 | 9,689 |
Allowance for loan loss | 9,689 | 12,092 | 14,545 | 26,753 | 31,353 | 103,831 | 9,689 |
Rehabilitation loans |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance | 11,604 | 13,668 | 18,371 | 30,000 | 35,633 | 2,331 | 18,371 |
Transition adjustment on adoption of ASU 2016-13 |  |  |  |  |  | 517 |  |
Current provision | (2,526) | (1,809) | (3,700) | (7,140) | (5,213) | 33,213 |  |
Write-offs | (393) | (255) | (1,003) | (227) | (420) | (428) |  |
Valuation adjustment on loans held for sale |  |  |  |  | 0 | 0 |  |
Ending balance | 8,685 | 11,604 | 13,668 | 22,633 | 30,000 | 35,633 | 8,685 |
Loans | 94,900 |  |  | 143,400 |  |  | 94,900 |
Allowance for loan loss | 8,685 | 11,604 | 13,668 | 22,633 | 30,000 | 35,633 | 8,685 |
Single-family rental loans |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance | 2,360 | 2,746 | 3,918 | 6,931 | 7,431 | 62 | 3,918 |
Transition adjustment on adoption of ASU 2016-13 |  |  |  |  |  | 754 |  |
Current provision | (670) | (386) | (1,172) | (1,906) | (500) | 6,615 |  |
Write-offs | (56) | 0 | 0 | 0 | 0 | 0 |  |
Valuation adjustment on loans held for sale |  |  |  |  | 0 | 0 |  |
Ending balance | 1,634 | 2,360 | 2,746 | 5,025 | 6,931 | 7,431 | 1,634 |
Allowance for loan loss | 1,634 | 2,360 | 2,746 | 5,025 | 6,931 | 7,431 | 1,634 |
Seasoned performing loans |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance | 57 | 66 | 107 | 224 | 249 | 0 | 107 |
Transition adjustment on adoption of ASU 2016-13 |  |  |  |  |  | 19 |  |
Current provision | (7) | (9) | (41) | (74) | (25) | 230 |  |
Write-offs | 0 | 0 | 0 | 0 | 0 | 0 |  |
Valuation adjustment on loans held for sale |  |  |  |  | 0 | 0 |  |
Ending balance | 50 | 57 | 66 | 150 | 224 | 249 | 50 |
Allowance for loan loss | 50 | 57 | 66 | 150 | 224 | 249 | 50 |
Purchased credit deteriorated loans |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance | 28,148 | 32,219 | 43,369 | 68,081 | 70,867 | 244 | 43,369 |
Transition adjustment on adoption of ASU 2016-13 |  |  |  |  |  | 62,361 |  |
Current provision | (4,020) | (3,963) | (10,936) | (16,374) | (2,579) | 8,481 |  |
Write-offs | (84) | (108) | (214) | (22) | (207) | (219) |  |
Valuation adjustment on loans held for sale |  |  |  |  | 0 | 0 |  |
Ending balance | 24,044 | 28,148 | 32,219 | 51,685 | 68,081 | 70,867 | 24,044 |
Loans | 57,400 |  |  | 72,700 |  |  | 57,400 |
Allowance for loan loss | 24,044 | $ 28,148 | $ 32,219 | 51,685 | $ 68,081 | $ 70,867 | 24,044 |
Unfunded Loan Commitment |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |
Ending balance | 355 |  |  | 1,600 |  |  | 355 |
Commitment to lend, unfunded | 29,200 |  |  | 73,200 |  |  | 29,200 |
Allowance for loan loss | $ 355 |  |  | $ 1,600 |  |  | $ 355 |
Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |
Allowance for loan loss |  |  |  |  |  |  |  | $ 8,300

X
- Definition Financing Receivable, Allowance for Credit Loss, Adoption of New Accounting Principle + References No definition available. + Details
Name: | mfa_FinancingReceivableAllowanceforCreditLossAdoptionofNewAccountingPrinciple
Namespace Prefix: | mfa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Financing Receivable, Gross Up of Amortized Cost of Purchased Credit Deteriorated Loans + References No definition available. + Details
Name: | mfa_FinancingReceivableGrossUpofAmortizedCostofPurchasedCreditDeterioratedLoans
Namespace Prefix: | mfa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Financing Receivable, Valuation Allowance Adjustment + References No definition available. + Details
Name: | mfa_FinancingReceivableValuationAllowanceAdjustment
Namespace Prefix: | mfa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)(2)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (3) Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (c) Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (1) + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of writeoff of financing receivable, charged against allowance for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of unfunded portion of contractual agreement to lend funds to borrower for financing receivable modified as troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121585226&loc=d3e18794-111554 + Details
Name: | us-gaap_LoansAndLeasesReceivableImpairedCommitmentToLend
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, before allowance for credit loss, of financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953401-111524 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919253-210447 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 80 -URI http://asc.fasb.org/extlink&oid=124267575&loc=SL82922355-210448 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (1) Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (2) Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1404 -Paragraph (a) + Details
Name: | us-gaap_NotesReceivableGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of credit loss expense (reversal of expense) for financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(11)) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
Name: | us-gaap_ProvisionForLoanLossesExpensed
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=mfa_RehabilitationLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=mfa_SingleFamilyRentalLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=mfa_SeasonedPerformingLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=mfa_PurchasedCreditDeterioratedLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_UnfundedLoanCommitmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CumulativeEffectPeriodOfAdoptionAxis=srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |