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Debt - Mortgages and Other Notes Payable - Additional Information (Details) $ in Thousands		3 Months Ended		6 Months Ended	12 Months Ended
	Mar. 31, 2022 USD ($)	Jun. 30, 2022 USD ($) Mortgage	Mar. 31, 2022 USD ($)	Jun. 30, 2022 USD ($) Mortgage	Dec. 31, 2021 USD ($) Mortgage	Dec. 31, 2020 USD ($)	Dec. 30, 2021	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)
Debt Instrument [Line Items]
Notes receivable, net		$ 137,306		$ 137,306	$ 153,886
Note receivable principal amount										$ 1,700
Maximum borrowing capacity		900,000		$ 900,000	$ 0
Maturity date				Apr. 06, 2027
Number of properties collateralized \| Mortgage					37
Short-term Debt, Refinanced, Amount					$ 18,500
Canton Marketplace
Debt Instrument [Line Items]
Mortgage					31,800
Mortgages
Debt Instrument [Line Items]
Debt Instrument, Face Amount		42,200		$ 42,200
Notes receivable, net		$ 50,200		50,200
Mortgage Loan Principal Reduction Amount				$ 8,600
Number of properties collateralized \| Mortgage		34		34
Mortgages \| Canton Marketplace
Debt Instrument [Line Items]
Mortgage					$ 31,800
Interest rate, stated percentage					3.35%
Debt instrument, maturity date				May 01, 2023
Mortgages \| Monroe Marketplace
Debt Instrument [Line Items]
Mortgage					$ 29,200
Maturity date					Nov. 12, 2026
Mortgages \| Subscription Line
Debt Instrument [Line Items]
Notes receivable, net	$ 78,200		$ 78,200							$ 37,700
Note receivable principal amount	1,100		1,100
Mortgages \| Subscription Line 1
Debt Instrument [Line Items]
Notes receivable, net					$ 14,800
Note receivable principal amount					3,000			$ 10,200
Notes Payable					64,200
Repayments Of Debt					$ 59,200	$ 79,200
Mortgages \| Subscription Line 2
Debt Instrument [Line Items]
Notes receivable, net		$ 62,200		$ 62,200					$ 125,700
Note receivable principal amount									$ 6,500
Mortgages \| Subscription Line 3
Debt Instrument [Line Items]
Notes receivable, net								$ 53,100
Mortgages One
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 20,800		$ 20,800
Maturity date	Feb. 14, 2022		Feb. 14, 2023
LIBOR plus	1.60%		1.60%
SOFR Plus	1.75%		1.75%
SOFR
Debt Instrument [Line Items]
Basis spread on variable rate				2.56%
SOFR \| Mortgages \| Monroe Marketplace
Debt Instrument [Line Items]
Basis spread on variable rate					2.76%
Fund IV
Debt Instrument [Line Items]
Repayments of debt				$ 17,000	$ 23,500
Scheduled principal payment					$ 8,600
Fund IV \| Bridge Facility
Debt Instrument [Line Items]
LIBOR plus					2.50%		2.00%
LIBOR floor					0.25%
Fund V
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 42,400		$ 42,400
Interest rate, stated percentage		5.10%		5.10%
Core Portfolio
Debt Instrument [Line Items]
Notes receivable, net		$ 16,000		$ 16,000
Derivative, notional amount		601,755		$ 601,755
Core Portfolio \| Disposed of by sale
Debt Instrument [Line Items]
Repayments of debt			$ 12,300		$ 6,700
Scheduled principal payment			3,500
Fund II \| Mortgages
Debt Instrument [Line Items]
Maturity date					Aug. 11, 2022
Loans Payable					$ 16,800
Fund II \| LIBOR \| Mortgages
Debt Instrument [Line Items]
Basis spread on variable rate					2.75%
Fund III
Debt Instrument [Line Items]
Repayments of debt		$ 22,700	57,800
Interest Rate Swaps
Debt Instrument [Line Items]
Derivative, notional amount					$ 16,700
Cash proceeds from swaps					$ 3,400
Interest Rate Swaps \| New Towne Plaza
Debt Instrument [Line Items]
Derivative, notional amount	$ 15,100		$ 15,100