XML 92 R81.htm IDEA: XBRL DOCUMENT
v3.25.3

Income Taxes - Narrative (Details) $ in Millions | Sep. 30, 2025 USD ($)
--- | ---
Income Tax Disclosure [Abstract] |
Percentage of REIT taxable income that is the Company's objective to distribute within the permitted timeframe | 100.00%
Federal net operating loss carryforward | $ 354.0

X
- Definition Percentage of REIT taxable income that is the Company's objective to distribute within the permitted timeframe + References No definition available. + Details
Name: | mfa_RealEstateInvestmentTrustsREITTaxableIncomeDistributionObjectivePercent
Namespace Prefix: | mfa_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible domestic operating loss carryforwards. Excludes state and local operating loss carryforwards. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-6 + Details
Name: | us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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