Organization and Basis of Presentation - Description of business (Details) - property	Sep. 30, 2019	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Total rental properties	14,403	14,544
Previous rentals identified for sale	229	346

Number Of Real Estate Properties, Held For Use, Excluding Previous Rentals And Legacy REO

No definition available.

Name:	aamc_NumberOfRealEstatePropertiesHeldForUseExcludingPreviousRentalsAndLegacyREO
Namespace Prefix:	aamc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant