Significant Accounting Policies - Investment in Commercial Real Estate Properties (Narrative) (Details)	12 Months Ended
	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Weighted average amortization period, above-market lease costs	4 years 8 months 12 days
Weighted average amortization period, below-market lease costs	8 years 1 month 6 days
Weighted average amortization period, in-place lease costs	3 years 1 month 6 days
Period from cessation of major construction activity to completion of construction project, maximum	1 year
Minimum | Above Market Leases
Property, Plant and Equipment [Line Items]
Estimated useful life of other intangible assets (in years)	1 year
Minimum | Below Market Leases
Property, Plant and Equipment [Line Items]
Estimated useful life of other intangible assets (in years)	1 year
Minimum | In Place Leases
Property, Plant and Equipment [Line Items]
Estimated useful life of other intangible assets (in years)	1 year
Minimum | Building
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	3 years
Maximum | Above Market Leases
Property, Plant and Equipment [Line Items]
Estimated useful life of other intangible assets (in years)	15 years
Maximum | Below Market Leases
Property, Plant and Equipment [Line Items]
Estimated useful life of other intangible assets (in years)	15 years
Maximum | In Place Leases
Property, Plant and Equipment [Line Items]
Estimated useful life of other intangible assets (in years)	15 years
Maximum | Building
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	40 years