Organization and Basis of Presentation - Additional Information (Details)	9 Months Ended
Sep. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Required annual distribution of taxable income	90.00%
Intended annual distribution of taxable income	100.00%

The percentage of annual taxable income that is required to be distributed, subject to certain adjustments, to qualify to be taxed as a REIT under Internal Revenue Code of 1986.

No definition available.

Name:	aaic_RequiredAnnualDistributionOfTaxableIncome
Namespace Prefix:	aaic_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration