Business of Organization - Schedule of Owned Properties (Details)	6 Months Ended
	Jun. 30, 2017
Brooks Crossing
Business And Organization [Line Items]
Percentage of preferred return on investment	8.00%
Lightfoot Marketplace
Business And Organization [Line Items]
Percentage of preferred return on investment	9.00%
Johns Hopkins Village
Business And Organization [Line Items]
Percentage of preferred return on investment	9.00%
Office | 4525 Main Street
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Office | Armada Hoffler Tower
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Office | Commonwealth of Virginia-Chesapeake
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Office | Commonwealth of Virginia-Virginia Beach
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Office | One Columbus
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Office | Two Columbus
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | 249 Central Park Retail
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Alexander Pointe
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Bermuda Crossroads
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Broad Creek Shopping Center
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Broadmoor Plaza
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Brooks Crossing
Business And Organization [Line Items]
Ownership interest percentage in properties	65.00%
Retail | Columbus Village
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Columbus Village II
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Commerce Street Retail
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Courthouse 7-Eleven
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Dick's at Town Center
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Dimmock Square
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Fountain Plaza Retail
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Gainsborough Square
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Greentree Shopping Center
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Hanbury Village
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Harper Hill Commons
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Harrisonburg Regal
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Lightfoot Marketplace
Business And Organization [Line Items]
Ownership interest percentage in properties	70.00%
Retail | North Hampton Market
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | North Point Center
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Oakland Marketplace
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Parkway Marketplace
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Patterson Place
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Perry Hall Marketplace
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Providence Plaza
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Renaissance Square
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Sandbridge Commons
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Socastee Commons
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Southgate Square
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Southshore Shops
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | South Retail
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | South Square
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Stone House Square
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Studio 56 Retail
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Tyre Neck Harris Teeter
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Waynesboro Commons
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Retail | Wendover Village
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Multifamily | Encore Apartments
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Multifamily | Johns Hopkins Village
Business And Organization [Line Items]
Ownership interest percentage in properties	80.00%
Multifamily | Liberty Apartments
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Multifamily | Smith's Landing
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%
Multifamily | The Cosmopolitan
Business And Organization [Line Items]
Ownership interest percentage in properties	100.00%