Indebtedness - Schedule of Debt (Details) - USD ($) $ in Thousands					12 Months Ended
	Dec. 21, 2021	Jan. 28, 2021	Oct. 30, 2020	Sep. 22, 2020	Dec. 31, 2021	Dec. 31, 2020	Sep. 30, 2021	Aug. 24, 2021
Debt Instrument [Line Items]
Total principal balances					$ 957,387	$ 962,812
Other notes payable					10,144	10,004
Unamortized GAAP adjustments					(8,621)	(8,971)
Liabilities related to assets held for sale					(41,364)	0
Indebtedness, net					917,556	963,845
Discontinued Operations, Held-for-sale
Debt Instrument [Line Items]
Liabilities related to assets held for sale					$ (41,354)	$ 0
LIBOR | Senior unsecured revolving credit facility | Minimum
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate					1.30%
LIBOR | Senior unsecured revolving credit facility | Maximum
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate					1.85%
LIBOR | Senior unsecured term loan | Minimum
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate					1.25%
LIBOR | Senior unsecured term loan | Maximum
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate					1.80%
LIBOR | Senior unsecured term loan | Minimum
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate					1.25%
LIBOR | Senior unsecured term loan | Maximum
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate					1.80%
Socastee Commons
Debt Instrument [Line Items]
Stated interest rate						4.57%
Johns Hopkins Village
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate						1.25%
Red Mill West
Debt Instrument [Line Items]
Stated interest rate					4.23%
Marketplace at Hilltop
Debt Instrument [Line Items]
Stated interest rate					4.42%
1405 Point
Debt Instrument [Line Items]
Remaining lease term					42 years
1405 Point | LIBOR
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate					2.25%
Nexton Square
Debt Instrument [Line Items]
Indebtedness, net		$ 20,100
Nexton Square | LIBOR
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate		2.25%		2.25%	2.25%
Wills Wharf | LIBOR
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate					2.25%
249 Central Park Retail | LIBOR
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate					1.60%
Fountain Plaza Retail | LIBOR
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate					1.60%
South Retail | LIBOR
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate					1.60%
Hoffler Place | LIBOR
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate					2.60%
Summit Place | LIBOR
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate					2.60%
One City Center | LIBOR
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate					1.85%
Chronicle Mill | LIBOR
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate						3.00%
Red Mill Central
Debt Instrument [Line Items]
Stated interest rate					4.80%
Gainesville Apartments | LIBOR
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate					3.00%
Premier Apartments | LIBOR
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate					1.55%
Premier Retail | LIBOR
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate					1.55%
Red Mill South
Debt Instrument [Line Items]
Stated interest rate					3.57%
Brooks Crossing Office | LIBOR
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate					1.60%
Market at Mill Creek | LIBOR
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate					1.55%
North Point Center
Debt Instrument [Line Items]
Stated interest rate					7.25%
Encore Apartments
Debt Instrument [Line Items]
Stated interest rate					2.93%
4525 Main Street
Debt Instrument [Line Items]
Stated interest rate					2.93%
Delray Beach Plaza | LIBOR
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate					3.00%
Thames Street Wharf
Debt Instrument [Line Items]
Indebtedness, net							$ 71,000
Stated interest rate							2.35%
Thames Street Wharf | BSBY
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate					1.30%
Southgate Square | LIBOR
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate	1.90%				1.90%
Greenbrier Square
Debt Instrument [Line Items]
Stated interest rate					3.74%			3.74%
Lexington Square
Debt Instrument [Line Items]
Stated interest rate					4.50%
Red Mill North
Debt Instrument [Line Items]
Stated interest rate					4.73%
Greenside Apartments
Debt Instrument [Line Items]
Stated interest rate					3.17%
The Residences at Annapolis Junction | SOFR
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate			2.66%		2.66%
Smith’s Landing
Debt Instrument [Line Items]
Stated interest rate					4.05%
Liberty Apartments
Debt Instrument [Line Items]
Stated interest rate					5.66%
Edison Apartments
Debt Instrument [Line Items]
Stated interest rate					5.30%
Secured Debt
Debt Instrument [Line Items]
Total principal balances					$ 747,387	$ 747,812
Secured Debt | Socastee Commons
Debt Instrument [Line Items]
Total principal balances					0	4,458
Secured Debt | Johns Hopkins Village
Debt Instrument [Line Items]
Total principal balances					0	50,859
Secured Debt | Red Mill West
Debt Instrument [Line Items]
Total principal balances					10,386	10,851
Secured Debt | Marketplace at Hilltop
Debt Instrument [Line Items]
Total principal balances					9,706	10,120
Secured Debt | 1405 Point
Debt Instrument [Line Items]
Total principal balances					52,286	53,000
Secured Debt | Nexton Square
Debt Instrument [Line Items]
Total principal balances					20,107	22,909
Secured Debt | Wills Wharf
Debt Instrument [Line Items]
Total principal balances					64,288	59,044
Secured Debt | 249 Central Park Retail
Debt Instrument [Line Items]
Total principal balances					16,352	16,597
Secured Debt | Fountain Plaza Retail
Debt Instrument [Line Items]
Total principal balances					9,841	9,988
Secured Debt | South Retail
Debt Instrument [Line Items]
Total principal balances					7,179	7,287
Secured Debt | Hoffler Place
Debt Instrument [Line Items]
Total principal balances					18,400	18,400
Secured Debt | Summit Place
Debt Instrument [Line Items]
Total principal balances					23,100	23,100
Secured Debt | One City Center
Debt Instrument [Line Items]
Total principal balances					24,084	24,712
Secured Debt | Chronicle Mill
Debt Instrument [Line Items]
Total principal balances					0	0
Secured Debt | Red Mill Central
Debt Instrument [Line Items]
Total principal balances					2,188	2,363
Secured Debt | Gainesville Apartments
Debt Instrument [Line Items]
Total principal balances					18,114	0
Secured Debt | Premier Apartments
Debt Instrument [Line Items]
Total principal balances					16,508	16,716
Secured Debt | Premier Retail
Debt Instrument [Line Items]
Total principal balances					8,131	8,241
Secured Debt | Red Mill South
Debt Instrument [Line Items]
Total principal balances					5,518	5,833
Secured Debt | Brooks Crossing Office
Debt Instrument [Line Items]
Total principal balances					14,882	15,393
Secured Debt | Market at Mill Creek
Debt Instrument [Line Items]
Total principal balances					13,142	13,789
Secured Debt | North Point Center
Debt Instrument [Line Items]
Total principal balances					1,942	2,094
Secured Debt | Encore Apartments
Debt Instrument [Line Items]
Total principal balances					24,523	24,337
Secured Debt | 4525 Main Street
Debt Instrument [Line Items]
Total principal balances					31,476	31,231
Secured Debt | Delray Beach Plaza
Debt Instrument [Line Items]
Total principal balances					14,039	0
Secured Debt | Thames Street Wharf
Debt Instrument [Line Items]
Total principal balances					70,761	70,000
Secured Debt | Southgate Square
Debt Instrument [Line Items]
Total principal balances					27,060	19,682
Secured Debt | Greenbrier Square
Debt Instrument [Line Items]
Total principal balances					20,000	0
Secured Debt | Lexington Square
Debt Instrument [Line Items]
Total principal balances					14,172	14,440
Secured Debt | Red Mill North
Debt Instrument [Line Items]
Total principal balances					4,189	4,294
Secured Debt | Greenside Apartments
Debt Instrument [Line Items]
Total principal balances					32,598	33,310
Secured Debt | The Residences at Annapolis Junction
Debt Instrument [Line Items]
Total principal balances					84,375	84,375
Secured Debt | Smith’s Landing
Debt Instrument [Line Items]
Total principal balances					16,452	17,331
Secured Debt | Liberty Apartments
Debt Instrument [Line Items]
Total principal balances					13,572	13,877
Secured Debt | Edison Apartments
Debt Instrument [Line Items]
Total principal balances					15,926	16,272
Secured Debt | The Cosmopolitan
Debt Instrument [Line Items]
Total principal balances					$ 42,090	42,909
Stated interest rate					3.35%
Unsecured Debt
Debt Instrument [Line Items]
Total principal balances					$ 210,000	215,000
Unsecured Debt | Senior unsecured revolving credit facility
Debt Instrument [Line Items]
Total principal balances					5,000	10,000
Unsecured Debt | Senior unsecured term loan
Debt Instrument [Line Items]
Total principal balances					19,500	19,500
Unsecured Debt | Senior unsecured term loan
Debt Instrument [Line Items]
Total principal balances					$ 185,500	$ 185,500