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Amount of the required periodic payments applied to principal.

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The cash inflow provided by derivative instruments during the period, which are classified as financing activities, excluding those designated as hedging instruments.

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Debt - Mortgages and Other Notes Payable - Additional Information (Details) $ in Thousands		3 Months Ended	12 Months Ended
	Mar. 31, 2022 USD ($) Mortgage	Mar. 31, 2022 USD ($) 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	$ 153,161	$ 153,161	$ 153,886
Note receivable principal amount								$ 1,700
Maximum borrowing capacity	$ 900,000	$ 900,000
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]
Number of properties collateralized \| Mortgage	38	38
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							$ 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 \| Mortgages \| Monroe Marketplace
Debt Instrument [Line Items]
Basis spread on variable rate			2.76%
Fund IV
Debt Instrument [Line Items]
Repayments of debt		$ 8,400	$ 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%
Core Portfolio
Debt Instrument [Line Items]
Derivative, notional amount	$ 501,884	501,884
Core Portfolio \| Disposed of by sale
Debt Instrument [Line Items]
Repayments of debt		12,300	$ 6,700
Scheduled principal payment		2,200
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		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