Commitment fund amount of acquisition of properties.

No definition available.

Name:	aaic_CommitmentFundAmountOfAcquisitionOfProperties
Namespace Prefix:	aaic_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount, before accumulated depreciation, of commitments to acquire single-family residential real estate investment.

+ References

No definition available.

+ Details

Name:	aaic_CommitmentToAcquireRealEstate
Namespace Prefix:	aaic_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum commitment fund amount of acquisition of properties.

+ References

No definition available.

+ Details

Name:	aaic_MaximumCommitmentFundAmountOfAcquisitionOfProperties
Namespace Prefix:	aaic_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Number of residential real estate properties the Company has committed to purchase as of reporting date.

+ References

No definition available.

+ Details

Name:	aaic_NumberOfPropertiesCommittedToAcquire
Namespace Prefix:	aaic_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of properties committed to sell.

+ References

No definition available.

+ Details

Name:	aaic_NumberOfPropertiesCommittedToSell
Namespace Prefix:	aaic_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of residential properties.

+ References

No definition available.

+ Details

Name:	aaic_NumberOfResidentialProperties
Namespace Prefix:	aaic_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Related to Property Sales Amount

+ References

No definition available.

+ Details

Name:	aaic_RelatedToPropertySalesAmount
Namespace Prefix:	aaic_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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:	srt_RealEstateAndAccumulatedDepreciationLineItems
Namespace Prefix:	srt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- 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 https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 954
-SubTopic 440
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=6491277&loc=d3e6429-115629

+ Details

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

- Definition

Escrow deposits related to property sales in noncash investing and financing activities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=126999549&loc=d3e4304-108586

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 5
-URI https://asc.fasb.org/extlink&oid=126999549&loc=d3e4332-108586

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 4
-URI https://asc.fasb.org/extlink&oid=126999549&loc=d3e4313-108586

+ Details

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

- Definition

Useful life on which depreciation was computed for entities with a substantial portion of business acquiring and holding investment real estate, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 970
-SubTopic 360
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-28(Column I))
-URI https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024

+ Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationLifeUsedForDepreciation1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, before accumulated depreciation, of real estate investment by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate. Excludes real estate not held as investment or interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 970
-SubTopic 360
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-28(Column E))
-URI https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024

+ Details

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

- Definition

Amount of depreciation expense of real estate investments for entities with a substantial portion of business acquiring and holding investment real estate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 970
-SubTopic 360
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-28(Footnote 4))
-URI https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024

+ Details

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

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=srt_SingleFamilyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
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Investments in SFR Properties - Additional Information (Details) $ in Thousands				3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 20, 2022 USD ($)	May 27, 2022 USD ($) Property	May 10, 2022 USD ($) Property	Jun. 30, 2022 USD ($) Property	Jun. 30, 2022 USD ($) Property	Dec. 31, 2021 USD ($) Property
Real Estate And Accumulated Depreciation [Line Items]
Investments in single-family residential real estate, at cost				$ 182,783	$ 182,783	$ 61,188
Single-Family Residential Properties
Real Estate And Accumulated Depreciation [Line Items]
Maximum commitment fund amount of acquisition of properties				65,000	65,000
Commitment fund amount of acquisition of properties				55,000	$ 55,000
Number of properties \| Property					586	214
Investments in single-family residential real estate, at cost				182,783	$ 182,783	$ 61,188
Depreciation expense				604	$ 1,319
Number of properties committed to acquire \| Property					25
Commitments to purchase investments in single-family residential real estate, at cost				$ 9,034	$ 9,034
Number of properties committed to sell \| Property		376	378	376
Initial deposits related to sale	$ 2,655		$ 2,655
Related to property sold amount		$ 131,921	$ 132,750
Escrow deposit	$ 5,310
Single-Family Residential Properties \| Building [Member]
Real Estate And Accumulated Depreciation [Line Items]
Useful life of building and improvements					27 years 6 months
Single-Family Residential Properties \| Building Improvements [Member] \| Minimum
Real Estate And Accumulated Depreciation [Line Items]
Useful life of building and improvements					5 years
Single-Family Residential Properties \| Building Improvements [Member] \| Maximum
Real Estate And Accumulated Depreciation [Line Items]
Useful life of building and improvements					27 years 6 months