Indebtedness - Schedule of Debt (Details) - USD ($) $ in Thousands						12 Months Ended
	Dec. 20, 2022	Sep. 27, 2022	Jun. 30, 2022	Dec. 21, 2021	Jan. 28, 2021	Dec. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Aug. 24, 2021
Debt Instrument [Line Items]
Total principal balances						$ 1,073,132	$ 957,387
Other notes payable						6,131	10,144
Unamortized GAAP adjustments						(11,002)	(8,621)
Liabilities related to assets held for sale						0	(41,364)
Indebtedness, net						1,068,261	917,556
Discontinued Operations, Held-for-sale
Debt Instrument [Line Items]
Liabilities related to assets held for sale						$ 0	(41,354)
1405 Point
Debt Instrument [Line Items]
Remaining lease term						40 years
Thames Street Wharf
Debt Instrument [Line Items]
Indebtedness, net								$ 71,000
Stated interest rate								2.35%
Southgate Square | LIBOR
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate				1.90%
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%
Greenbrier Square
Debt Instrument [Line Items]
Stated interest rate									3.74%
Secured Debt
Debt Instrument [Line Items]
Total principal balances						$ 612,132	747,387
Secured Debt | Delray Beach Plaza
Debt Instrument [Line Items]
Total principal balances						0	14,039
Secured Debt | Red Mill West(c)
Debt Instrument [Line Items]
Total principal balances						0	10,386
Secured Debt | Hoffler Place
Debt Instrument [Line Items]
Total principal balances						0	18,400
Secured Debt | Summit Place
Debt Instrument [Line Items]
Total principal balances						0	23,100
Secured Debt | North Pointe Center
Debt Instrument [Line Items]
Total principal balances						0	1,942
Secured Debt | The Residences at Annapolis Junction
Debt Instrument [Line Items]
Total principal balances						0	84,375
Secured Debt | Marketplace at Hilltop
Debt Instrument [Line Items]
Total principal balances						0	9,706
Secured Debt | 1405 Point
Debt Instrument [Line Items]
Total principal balances						0	52,286
Secured Debt | Brooks Crossing Office
Debt Instrument [Line Items]
Total principal balances						0	14,882
Secured Debt | One City Center
Debt Instrument [Line Items]
Total principal balances						0	24,084
Secured Debt | Wills Wharf
Debt Instrument [Line Items]
Total principal balances						0	64,288
Secured Debt | 249 Central Park Retail
Debt Instrument [Line Items]
Total principal balances						0	16,352
Secured Debt | Fountain Plaza Retail
Debt Instrument [Line Items]
Total principal balances						0	9,841
Secured Debt | South Retail
Debt Instrument [Line Items]
Total principal balances						0	7,179
Secured Debt | Chronicle Mill
Debt Instrument [Line Items]
Total principal balances						$ 27,630	0
Secured Debt | Chronicle Mill | LIBOR
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate						3.00%
Secured Debt | Red Mill Central
Debt Instrument [Line Items]
Total principal balances						$ 2,013	2,188
Stated interest rate						4.80%
Secured Debt | Premier Apartments
Debt Instrument [Line Items]
Total principal balances						$ 16,269	16,508
Secured Debt | Premier Apartments | LIBOR
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate						1.55%
Secured Debt | Premier Retail
Debt Instrument [Line Items]
Total principal balances						$ 8,013	8,131
Secured Debt | Premier Retail | LIBOR
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate						1.55%
Secured Debt | Red Mill South
Debt Instrument [Line Items]
Total principal balances						$ 5,191	5,518
Stated interest rate						3.57%
Secured Debt | Market at Mill Creek
Debt Instrument [Line Items]
Total principal balances						$ 12,494	13,142
Secured Debt | Market at Mill Creek | LIBOR
Debt Instrument [Line Items]
Stated interest rate						1.55%
Secured Debt | Gainesville Apartments
Debt Instrument [Line Items]
Total principal balances						$ 30,000	18,114
Indebtedness, net	$ 30,000
Secured Debt | Gainesville Apartments | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate	1.50%					1.50%
Secured Debt | Encore Apartments
Debt Instrument [Line Items]
Total principal balances						$ 23,980	24,523
Stated interest rate						2.93%
Secured Debt | 4525 Main Street
Debt Instrument [Line Items]
Total principal balances						$ 30,785	31,476
Stated interest rate						2.93%
Secured Debt | Southern Post
Debt Instrument [Line Items]
Total principal balances						$ 0	0
Secured Debt | Southern Post | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate						2.25%
Secured Debt | Thames Street Wharf
Debt Instrument [Line Items]
Total principal balances						$ 69,327	70,761
Secured Debt | Thames Street Wharf | BSBY
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate						1.30%
Secured Debt | Constellation Energy Building
Debt Instrument [Line Items]
Total principal balances						$ 175,000	0
Secured Debt | Constellation Energy Building | BSBY
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate						1.50%
Secured Debt | Southgate Square
Debt Instrument [Line Items]
Total principal balances						$ 26,195	27,060
Secured Debt | Southgate Square | LIBOR
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate						1.90%
Secured Debt | Nexton Square
Debt Instrument [Line Items]
Total principal balances						$ 22,195	20,107
Indebtedness, net			$ 22,500
Secured Debt | Nexton Square | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate			1.95%			1.95%
Secured Debt | Nexton Square | Secured Overnight Financing Rate (SOFR) | Minimum
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate			0.30%
Secured Debt | Liberty Apartments
Debt Instrument [Line Items]
Total principal balances						$ 20,926	13,572
Indebtedness, net		$ 21,000
Secured Debt | Liberty Apartments | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate		1.50%				1.50%
Secured Debt | Greenbrier Square
Debt Instrument [Line Items]
Total principal balances						$ 19,940	20,000
Stated interest rate						3.74%
Secured Debt | Lexington Square
Debt Instrument [Line Items]
Total principal balances						$ 13,892	14,172
Stated interest rate						4.50%
Secured Debt | Red Mill North
Debt Instrument [Line Items]
Total principal balances						$ 4,079	4,189
Stated interest rate						4.73%
Secured Debt | Greenside Apartments
Debt Instrument [Line Items]
Total principal balances						$ 31,862	32,598
Stated interest rate						3.17%
Secured Debt | Smith’s Landing
Debt Instrument [Line Items]
Total principal balances						$ 15,535	16,452
Stated interest rate						4.05%
Secured Debt | Edison Apartments
Debt Instrument [Line Items]
Total principal balances						$ 15,563	15,926
Stated interest rate						5.30%
Secured Debt | The Cosmopolitan
Debt Instrument [Line Items]
Total principal balances						$ 41,243	42,090
Stated interest rate						3.35%
Unsecured Debt
Debt Instrument [Line Items]
Total principal balances						$ 461,000	210,000
Unsecured Debt | Revolving Credit Facility
Debt Instrument [Line Items]
Total principal balances						61,000	5,000
Unsecured Debt | M&T unsecured term loan
Debt Instrument [Line Items]
Total principal balances						100,000	0
Unsecured Debt | Term Loan Without Related Interest Rate Swap Agreement
Debt Instrument [Line Items]
Total principal balances						31,658	19,500
Unsecured Debt | Term Loan With Interest Rate Swap Agreement
Debt Instrument [Line Items]
Total principal balances						$ 268,342	$ 185,500
Unsecured Debt | Secured Overnight Financing Rate (SOFR) | Revolving Credit Facility | Minimum
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate						1.30%
Unsecured Debt | Secured Overnight Financing Rate (SOFR) | Revolving Credit Facility | Maximum
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate						1.85%
Unsecured Debt | Secured Overnight Financing Rate (SOFR) | M&T unsecured term loan | Minimum
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate						1.25%
Unsecured Debt | Secured Overnight Financing Rate (SOFR) | M&T unsecured term loan | Maximum
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate						1.80%
Unsecured Debt | Secured Overnight Financing Rate (SOFR) | Term Loan Without Related Interest Rate Swap Agreement | Minimum
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate						1.25%
Unsecured Debt | Secured Overnight Financing Rate (SOFR) | Term Loan Without Related Interest Rate Swap Agreement | Maximum
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate						1.80%
Unsecured Debt | Secured Overnight Financing Rate (SOFR) | Term Loan With Interest Rate Swap Agreement | Minimum
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate						1.25%
Unsecured Debt | Secured Overnight Financing Rate (SOFR) | Term Loan With Interest Rate Swap Agreement | Maximum
Debt Instrument [Line Items]
Stated interest rate, basis spread on variable rate						1.80%