Organization, Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Tenant Operating Status (Details)	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020
Core Portfolio
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Percentage of Tenants Open for Business	88.00%	86.00%	74.00%
Opportunity Funds
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Percentage of Tenants Open for Business	82.00%	88.00%	74.00%
COVID-19 | Core Portfolio
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Percentage of Tenants Open for Business	88.00%	86.00%	74.00%
COVID-19 | Opportunity Funds
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Percentage of Tenants Open for Business	82.00%	88.00%	74.00%