Summary of Significant Accounting Policies - Operating Real Estate Estimated Useful Lives (Details)	Sep. 30, 2025
Minimum | Building (fee interest)
Property, Plant and Equipment [Line Items]
Useful life (in years)	28 years
Minimum | Land improvements
Property, Plant and Equipment [Line Items]
Useful life (in years)	1 year
Minimum | Furniture, fixtures and equipment
Property, Plant and Equipment [Line Items]
Useful life (in years)	2 years
Maximum | Building (fee interest)
Property, Plant and Equipment [Line Items]
Useful life (in years)	47 years
Maximum | Land improvements
Property, Plant and Equipment [Line Items]
Useful life (in years)	15 years
Maximum | Furniture, fixtures and equipment
Property, Plant and Equipment [Line Items]
Useful life (in years)	9 years