XML 42 R56.htm IDEA: XBRL DOCUMENT
v3.19.3

Residential Whole Loans (Residential Whole Loans, at Carrying Value - Additional Information) (Details) - USD ($) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2019 | Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Purchased Performing Loans | $ 4,251,217,000 | $ 2,218,728,000
Purchased Credit Impaired Loans | $ 718,197,000 | 797,987,000
Weighted Average LTV Ratio | 80.00% |
Non-QM loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Purchased Performing Loans | $ 2,727,006,000 | 1,354,774,000
Rehabilitation loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Purchased Performing Loans | 968,867,000 | 494,576,000
Single-family rental loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Purchased Performing Loans | 366,362,000 | 145,327,000
Seasoned performing loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Purchased Performing Loans | 188,982,000 | $ 224,051,000
Certain Rehabilitation Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Allowance for losses | $ 388,000 |
90 or more |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Weighted Average LTV Ratio | 78.26% | 90.24%
Settled Whole Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Residential whole loans, at carrying value, total or weighted average | $ 4,910,278,000 |
Unpaid Principal Balance (“UPB”) | $ 5,021,777,000 |
Weighted Average Coupon | 6.03% |
Weighted Average Term to Maturity (Months) | 274 months |
Settled Whole Loans | Non-QM loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Purchased Performing Loans | $ 2,667,482,000 |
Unpaid Principal Balance (“UPB”) | $ 2,582,746,000 |
Weighted Average Coupon | 6.15% |
Weighted Average Term to Maturity (Months) | 365 months |
Weighted Average LTV Ratio | 66.00% |
Settled Whole Loans | Rehabilitation loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Purchased Performing Loans | $ 969,255,000 |
Unpaid Principal Balance (“UPB”) | $ 969,255,000 |
Weighted Average Coupon | 7.32% |
Weighted Average Term to Maturity (Months) | 8 months |
Weighted Average LTV Ratio | 65.00% |
Settled Whole Loans | Single-family rental loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Purchased Performing Loans | $ 366,362,000 |
Unpaid Principal Balance (“UPB”) | $ 364,350,000 |
Weighted Average Coupon | 6.27% |
Weighted Average Term to Maturity (Months) | 325 months |
Weighted Average LTV Ratio | 69.00% |
Settled Whole Loans | Seasoned performing loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Purchased Performing Loans | $ 188,982,000 |
Unpaid Principal Balance (“UPB”) | $ 205,243,000 |
Weighted Average Coupon | 4.40% |
Weighted Average Term to Maturity (Months) | 183 months |
Weighted Average LTV Ratio | 47.00% |
Settled Whole Loans | Purchased credit impaired loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Purchased Credit Impaired Loans | $ 718,197,000 |
Unpaid Principal Balance (“UPB”) | $ 900,183,000 |
Weighted Average Coupon | 4.44% |
Weighted Average Term to Maturity (Months) | 297 months |
Weighted Average LTV Ratio | 83.00% |
Settled Whole Loans | Certain Rehabilitation Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Purchased Performing Loans | $ 250,000,000.0 |
Weighted Average LTV Ratio | 69.00% |
Settled Whole Loans | Current | Non-QM loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Unpaid Principal Balance (“UPB”) | $ 2,527,231,000 |
Settled Whole Loans | Current | Rehabilitation loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Unpaid Principal Balance (“UPB”) | 843,034,000 |
Settled Whole Loans | Current | Single-family rental loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Unpaid Principal Balance (“UPB”) | 349,967,000 |
Settled Whole Loans | Current | Seasoned performing loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Unpaid Principal Balance (“UPB”) | 200,643,000 |
Settled Whole Loans | 30-59 | Non-QM loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Unpaid Principal Balance (“UPB”) | 29,208,000 |
Settled Whole Loans | 30-59 | Rehabilitation loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Unpaid Principal Balance (“UPB”) | 70,130,000 |
Settled Whole Loans | 30-59 | Single-family rental loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Unpaid Principal Balance (“UPB”) | 10,974,000 |
Settled Whole Loans | 30-59 | Seasoned performing loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Unpaid Principal Balance (“UPB”) | 2,223,000 |
Settled Whole Loans | 60-89 | Non-QM loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Unpaid Principal Balance (“UPB”) | 14,349,000 |
Settled Whole Loans | 60-89 | Rehabilitation loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Unpaid Principal Balance (“UPB”) | 16,801,000 |
Settled Whole Loans | 60-89 | Single-family rental loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Unpaid Principal Balance (“UPB”) | 2,256,000 |
Settled Whole Loans | 60-89 | Seasoned performing loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Unpaid Principal Balance (“UPB”) | 1,048,000 |
Settled Whole Loans | 90 or more | Non-QM loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Unpaid Principal Balance (“UPB”) | 11,958,000 |
Settled Whole Loans | 90 or more | Rehabilitation loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Unpaid Principal Balance (“UPB”) | 39,290,000 |
Settled Whole Loans | 90 or more | Single-family rental loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Unpaid Principal Balance (“UPB”) | 1,153,000 |
Settled Whole Loans | 90 or more | Seasoned performing loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Unpaid Principal Balance (“UPB”) | $ 1,329,000 |

X
- Definition Financing Receivable, Weighted Average Interest Rate + References No definition available. + Details
Name: | mfa_FinancingReceivableWeightedAverageInterestRate
Namespace Prefix: | mfa_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Financing Receivable, Weighted Average Term to Maturity + References No definition available. + Details
Name: | mfa_FinancingReceivableWeightedAverageTermtoMaturity
Namespace Prefix: | mfa_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Purchased Performing Loans + References No definition available. + Details
Name: | mfa_PurchasedPerformingLoans
Namespace Prefix: | mfa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The LTV of which the Company has assessed its residential whole loans at carrying value will have a higher likelihood of default than newly originated mortgage loans + References No definition available. + Details
Name: | mfa_RatioLoanToValue
Namespace Prefix: | mfa_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Unpaid Principal Balance + References No definition available. + Details
Name: | mfa_UnpaidPrincipalBalance
Namespace Prefix: | mfa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The recorded balance, net of any applicable reductions (for example, unamortized accretable yield and allowance for loan losses). This relates to loans not accounted for debt securities with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=118939070&loc=d3e15032-111544 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118938799&loc=d3e13503-111538 + Details
Name: | us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 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 (g) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=118939070&loc=d3e15032-111544 Reference 4: 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=118936363&loc=SL6953423-111524 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 + Details
Name: | us-gaap_LoansAndLeasesReceivableAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919230-210447 + Details
Name: | us-gaap_NotesReceivableGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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

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

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

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

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables1To29DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables30To59DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables60To89DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |