Organization and Basis of Presentation and Consolidations (Details)	6 Months Ended
	Jun. 30, 2022 a ft² room	Jun. 13, 2022 ft²	Jun. 30, 2021
Hampton Inn Property
Organization And Basis Of Presentation And Consolidation [Line Items]
Ownership percentage by noncontrolling owners			22.00%
Hanover Square Property
Organization And Basis Of Presentation And Consolidation [Line Items]
Percentage by parent	84.00%
Ownership percentage by noncontrolling owners	16.00%		16.00%
Parkway Property
Organization And Basis Of Presentation And Consolidation [Line Items]
Percentage by parent	82.00%
Ownership percentage by noncontrolling owners	18.00%
Greenbrier Business Center Property
Organization And Basis Of Presentation And Consolidation [Line Items]
Area of building	89,280
Lancer Center Shopping Center
Organization And Basis Of Presentation And Consolidation [Line Items]
Area of building	181,590
Franklin Square Property
Organization And Basis Of Presentation And Consolidation [Line Items]
Area of building	134,239
Hanover Square Property
Organization And Basis Of Presentation And Consolidation [Line Items]
Area of building	73,440
Hanover Square Property | Hanover Square Property
Organization And Basis Of Presentation And Consolidation [Line Items]
Percentage by parent	84.00%
Ownership percentage by noncontrolling owners	16.00%
Ashley Plaza Property
Organization And Basis Of Presentation And Consolidation [Line Items]
Area of building	164,012
Clemson Best Western Property
Organization And Basis Of Presentation And Consolidation [Line Items]
Number of hotel rooms | room	148
Area of land | a	5.92
Brookfield Center Property
Organization And Basis Of Presentation And Consolidation [Line Items]
Area of building	64,880
Parkway Property
Organization And Basis Of Presentation And Consolidation [Line Items]
Area of building	64,109
Parkway Property | Parkway Property
Organization And Basis Of Presentation And Consolidation [Line Items]
Percentage by parent	82.00%
Ownership percentage by noncontrolling owners	18.00%
Salisbury Marketplace Property
Organization And Basis Of Presentation And Consolidation [Line Items]
Area of building	79,732	79,732