Indebtedness (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
Unamortized Debt Issuance Expense	$ 1,600
Interest Expense, Long-term Debt	22,601	$ 26,336
Long-term Debt, Current Maturities	54,993
Long-term Debt	2,388,772		$ 2,343,364
Long-term Debt, Maturities, Repayments of Principal in Year Two	81,841
Long-term Debt, Maturities, Repayments of Principal in Year Three	300,318
Long-term Debt, Maturities, Repayments of Principal in Year Four	57,692
Long-term Debt, Maturities, Repayments of Principal after Year Five	339,105
Long-term Debt, Maturities, Repayments of Principal after Year Five	1,593,268
Long-term Debt	2,427,217
Interest Expense	23,160	26,991
Amortization of Financing Costs	1,566	1,609
interest expense credit facility	$ 559	655
Debt Instrument, Debt Covenant, Debt Service Coverage Ratio	1.74
Long-term Debt, Current Maturities, Line of Credit	$ 33,000
Secured Mortgage Note [Member]
Debt Instrument [Line Items]
Initial Interest Rate	3.93%
Spread over Initial Interest Rate option 1	200
Spread over Initial Interest Rate option 2	400
Indebtedness Weighted Average Remaining Maturity	8 years 7 months 6 days
Long-term Debt, Term	7 years
Debt, Term Of Extension	5 years
Retail Segment [Member]
Debt Instrument [Line Items]
Interest Expense, Long-term Debt	$ 6,165	6,444
Office Building
Debt Instrument [Line Items]
Interest Expense, Long-term Debt	1,828	6,668
Multifamily Communities
Debt Instrument [Line Items]
Interest Expense, Long-term Debt	$ 14,608	$ 13,224