Number Of Aggregate Shares Available For Purchase From Remaining Options Issued

No definition available.

Name:	aamc_NumberOfAggregateSharesAvailableForPurchaseFromRemainingOptionsIssued
Namespace Prefix:	aamc_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Share-based Compensation Arrangement By Share-based Payment Award, Conversion Between Plans, Ratio

+ References

No definition available.

+ Details

Name:	aamc_ShareBasedCompensationArrangementByShareBasedPaymentAwardConversionBetweenPlansRatio
Namespace Prefix:	aamc_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Share-based Compensation Arrangement By Share-based Payment Award, Number Of Annual Installments

+ References

No definition available.

+ Details

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

- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Number Of Trading Days Average Price Per Share Used For Vesting Requirements

+ References

No definition available.

+ Details

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

- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Percentage Reinvested Dividends To Price Per Share, Minimum

+ References

No definition available.

+ Details

Name:	aamc_SharebasedCompensationArrangementbySharebasedPaymentAwardPercentageReinvestedDividendsToPricePerShareMinimum
Namespace Prefix:	aamc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Period Distribution Of Vested Restricted Stock Deferred After Third Anniversary

+ References

No definition available.

+ Details

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

- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Value Of Restricted Stock Granted To Directors Annually

+ References

No definition available.

+ Details

Name:	aamc_SharebasedCompensationArrangementbySharebasedPaymentAwardValueOfRestrictedStockGrantedToDirectorsAnnually
Namespace Prefix:	aamc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

+ References

+ Details

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

- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

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

- Details

Name:	us-gaap_PlanNameAxis=aamc_A2012ConversionOptionPlanand2012SpecialConversionOptionPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=aamc_A2016And2019EquityIncentivePlansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_RestrictedStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=aamc_ServiceBasedRestrictedStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=aamc_MarketBasedRestrictedStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Share-Based Payments (Details) $ / shares in Units, $ in Thousands				3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 22, 2020 $ / shares shares	Mar. 29, 2020 $ / shares shares	Dec. 21, 2012	Jun. 30, 2020 USD ($) shares	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) Installment shares	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense \| $				$ 936	$ 1,811	$ 2,423	$ 2,930
Unrecognized share-based compensation expense \| $				$ 8,800		$ 8,800		$ 4,700
Unrecognized share-based compensation expense, remaining estimated term (years)						1 year 7 months 6 days		1 year
2012 Conversion Option Plan and 2012 Special Conversion Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Ratio for stock options from ASPS stock to Residential Stock			0.3333
Number of aggregate shares available for purchase from remaining options issued (in shares)				4,583		4,583
2016 and 2019 Equity Incentive Plans \| Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Value of restricted stock granted to directors annually \| $						$ 80
Period distribution of vested restricted stock is deferred						2 years
Number of restricted stock units granted (in shares)	64,071
Restricted stock granted, grant date fair value (usd per share) \| $ / shares	$ 8.74
Number of annual installments \| Installment						3
Number of trading dates average price per share used for vesting requirements						20 days
Percentage reinvested dividends to price per share, minimum						125.00%
2016 and 2019 Equity Incentive Plans \| Service-based restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock units granted (in shares)	443,963	419,657
Restricted stock granted, grant date fair value (usd per share) \| $ / shares	$ 8.74	$ 9.27
2016 and 2019 Equity Incentive Plans \| Market-based restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock units granted (in shares)	290,131	280,320
Restricted stock granted, grant date fair value (usd per share) \| $ / shares	$ 7.14	$ 7.39