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

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The expected sales price or cash proceeds of commitments to sell real estate assets and their associated debt financing obligations.

+ References

No definition available.

+ Details

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

- Definition

Maximum commitment fund amount of acquisition of properties.

+ References

No definition available.

+ Details

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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

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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

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of residential properties.

+ References

No definition available.

+ Details

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

- Definition

Related to Property Sales Amount

+ References

No definition available.

+ Details

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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

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Data Type:	xbrli:stringItemType
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- Definition

The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 5
-URI https://asc.fasb.org/extlink&oid=126905981&loc=d3e2443-110228

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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

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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

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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

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Details

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Balance Type:
Period Type:

- Details

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Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Investments in SFR Properties - Additional Information (Details) $ in Thousands			3 Months Ended		9 Months Ended		12 Months Ended
	Aug. 19, 2022 USD ($) Property	May 01, 2022 Property	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) Property	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($) Property	Nov. 11, 2022 USD ($)
Real Estate And Accumulated Depreciation [Line Items]
Investments in single-family residential real estate, at cost			$ 82,219		$ 82,219		$ 61,188
Gain (Loss) on sale of properties	$ 14,407
Single-Family Residential Properties
Real Estate And Accumulated Depreciation [Line Items]
Maximum commitment fund amount of acquisition of properties			55,000		$ 55,000
Number of properties \| Property					246		214
Investments in single-family residential real estate, at cost			82,219		$ 82,219		$ 61,188
Depreciation expense			632	$ 12	$ 1,951	$ 12
Number of properties committed to acquire \| Property					5
Commitments to purchase investments in single-family residential real estate, at cost			$ 1,523		$ 1,523
Number of properties committed to sell \| Property	371	371
Related to property sold amount	$ 130,026
Commitment to sell real estate assets and associated debt liabilities								$ 87,330
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