Debt Instrument, Minimum Draw Increments

No definition available.

Name:	aamc_DebtInstrumentMinimumDrawIncrements
Namespace Prefix:	aamc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt Instrument, Term, Extension Option

+ References

No definition available.

+ Details

Name:	aamc_DebtInstrumentTermExtensionOption
Namespace Prefix:	aamc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number Of Loan Agreements

+ References

No definition available.

+ Details

Name:	aamc_NumberOfLoanAgreements
Namespace Prefix:	aamc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number Of Rental Properties

+ References

No definition available.

+ Details

Name:	aamc_NumberOfRentalProperties
Namespace Prefix:	aamc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number Of Terms For Loan Agreement

+ References

No definition available.

+ Details

Name:	aamc_NumberOfTermsForLoanAgreement
Namespace Prefix:	aamc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The designation of funds furnished by a borrower to a lender to assure future payments of the borrower's real estate taxes and insurance obligations with respect to a mortgaged property. Escrow deposits may be made for a variety of other purposes such as earnest money and contingent payments. This element excludes replacement reserves which are an escrow separately provided for within the US GAAP taxonomy.

+ 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 210.9-03.10)
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

+ Details

Name:	us-gaap_EscrowDeposit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentAxis=aamc_FYRSFRLoanAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=aamc_MSLoanAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=aamc_SecuritiesSoldunderAgreementstoRepurchaseandLoanAgreementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=aamc_HOMESFRBorrowerIILLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=aamc_HOMEIILoanAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=aamc_HOMESFRBorrowerIIILLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=aamc_HOMEIIILoanAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=aamc_HOMESFRBorrowerIVLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=aamc_HOMEIVLoanAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=aamc_RentalHomeAssociatesLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=aamc_FrontYardResidentialCorporationMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	dei_LegalEntityAxis=aamc_AmherstResidentialLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_NotesPayableOtherPayablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
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Borrowings - Narrative (Details)		6 Months Ended
Borrowings - Narrative (Details)	May 04, 2020 USD ($)	Jun. 30, 2020 USD ($) loan_term loan	Dec. 31, 2019 USD ($)	Dec. 07, 2018 property	Aug. 08, 2018 property
Debt Instrument [Line Items]
Number of rental properties \| property					2,015
FYR SFR Loan Agreement
Debt Instrument [Line Items]
Escrow deposit		$ 3,100,000	$ 600,000
MS Loan Agreement
Debt Instrument [Line Items]
Number of rental properties \| property				4,258
Escrow deposit		$ 8,400,000	$ 4,900,000
Repurchase and loan agreements
Debt Instrument [Line Items]
Interest rate on debt		3.46%
HOME SFR Borrower II, LLC \| Secured debt \| HOME II Loan Agreement
Debt Instrument [Line Items]
Number of terms for loan agreement \| loan_term		3
Length of loan term extension option, years		1 year
HOME SFR Borrower III, LLC \| Secured debt \| HOME III Loan Agreement
Debt Instrument [Line Items]
Number of terms for loan agreement \| loan_term		3
Length of loan term extension option, years		1 year
HOME SFR Borrower IV, LLC \| Secured debt \| HOME IV Loan Agreement
Debt Instrument [Line Items]
Number of loan agreements \| loan		2
Rental Home Associates LLC
Debt Instrument [Line Items]
Number of rental properties \| property					2,798
Front Yard \| Amherst \| Promissory Note
Debt Instrument [Line Items]
Principal amount of promissory note	$ 20,000,000
Minimum draw increments	$ 500,000
Front Yard \| Amherst \| Promissory Note \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	5.00%