Mortgage Loans Payable and Unsecured Credit Facility (Effect of Derivative Financial Instruments on Condensed Consolidated Statements of Operations and Condensed Consolidated Statements of Equity) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Designation/Cash Flow [Member] | Interest Rate Swap [Member]
Derivative Instruments Gain Loss [Line Items]
(Loss) gain recognized in other comprehensive income (loss) (effective portion)	$ (3,131,000)	$ 113,000	$ 6,001,000	$ 1,869,000
Continuing Operations [Member]
Derivative Instruments Gain Loss [Line Items]
(Loss) recognized in other comprehensive income (loss) reclassified into earnings (effective portion)		$ (1,482,000)	$ (2,320,000)	$ (4,942,000)