Debt Instrument, Term, Extension Option

No definition available.

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

- Definition

Line of Credit Facility, Maximum Borrowing Capacity, Uncommitted

+ References

No definition available.

+ Details

Name:	aamc_LineofCreditFacilityMaximumBorrowingCapacityUncommitted
Namespace Prefix:	aamc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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

Number of real estate properties directly acquired.

+ References

No definition available.

+ Details

Name:	aamc_NumberofRealEstatePropertiesDirectlyAcquired
Namespace Prefix:	aamc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
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

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

Including the current and noncurrent portions, aggregate carrying value as of the balance sheet date of loans payable (with maturities initially due after one year or beyond the operating cycle if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16)(a)(2))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

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

- Details

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

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=aamc_HOMEFlowTransactionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

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

- Details

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

- Details

Name:	dei_LegalEntityAxis=aamc_RESITLIBorrowerLLCMember
Namespace Prefix:
Data Type:	na
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Borrowings - Loan agreements narrative (Details)				9 Months Ended
Borrowings - Loan agreements narrative (Details)	Jun. 29, 2017 USD ($) property	Mar. 30, 2017 USD ($) property	Mar. 30, 2016 property	Sep. 30, 2017 loan_term	Apr. 06, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Apr. 10, 2015 USD ($)
Debt Instrument [Line Items]
Number of real estate properties directly acquired \| property			590
HOME SFR Borrower II, LLC \| HOME Flow Transaction
Debt Instrument [Line Items]
Number of real estate properties directly acquired \| property		757
HOME SFR Borrower III, LLC \| HOME Flow Transaction
Debt Instrument [Line Items]
Number of real estate properties directly acquired \| property	751
Secured debt \| Nomura Loan Agreement due April 5, 2018
Debt Instrument [Line Items]
Maximum borrowing capacity					$ 250,000,000.0	$ 250,000,000.0		$ 100,000,000.0
Uncommitted maximum borrowing amount					100,000,000.0
Secured debt \| MSR Loan Agreement due November 9, 2018
Debt Instrument [Line Items]
Amount borrowed pursuant to loan agreement							$ 489,300,000
Number of terms for loan agreement \| loan_term				3
Length of loan term extension option, years				1 year
Secured debt \| HOME II Loan Agreement due October 9, 2019 \| HOME SFR Borrower II, LLC
Debt Instrument [Line Items]
Amount borrowed pursuant to loan agreement		$ 79,900,000
Number of terms for loan agreement \| loan_term				3
Length of loan term extension option, years				1 year
Secured debt \| HOME II Loan Agreement due October 9, 2019 \| HOME SFR Borrower II, LLC \| HOME Flow Transaction
Debt Instrument [Line Items]
Amount borrowed pursuant to loan agreement		$ 79,900,000
Secured debt \| HOME III Loan Agreement due October 9, 2019 \| HOME SFR Borrower III, LLC \| HOME Flow Transaction
Debt Instrument [Line Items]
Amount borrowed pursuant to loan agreement	$ 87,800,000
Loans payable \| Term Loan Agreement due April 6, 2022 \| RESI TLI Borrower, LLC
Debt Instrument [Line Items]
Amount borrowed pursuant to loan agreement					$ 100,000,000
Fixed interest rate on loan agreement					5.00%