XML 66 R46.htm IDEA: XBRL DOCUMENT v3.20.4

Residential Whole Loans (Components of Interest Income) (Details) - Residential whole loans - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	$ 258,764	$ 243,980	$ 100,921
Non-QM loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	136,527	116,282	31,036
Rehabilitation loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	49,484	54,419	15,975
Single-family rental loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	27,722	17,742	3,315
Seasoned performing loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	8,793	12,191	5,818
Purchased Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	222,526	200,634	56,144
Purchased credit impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	$ 36,238	$ 43,346	$ 44,777

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 aggregate interest and fee income generated by: (1) loans the Entity has positive intent and ability to hold for the foreseeable future, or until maturity or payoff, including commercial and consumer loans, whether domestic or foreign, which may consist of: (a) industrial and agricultural; (b) real estate; and (c) real estate construction loans; (d) trade financing; (e) lease financing; (f) home equity lines-of-credit; (g) automobile and other vehicle loans; and (h) credit card and other revolving-type loans and (2) loans and leases held-for-sale which may include mortgage loans, direct financing, and sales-type leases.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.1)
-URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

+ Details

Name:	us-gaap_InterestAndFeeIncomeLoansAndLeases
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

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

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_PurchasedPerformingLoansMember
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: