Summary of Significant Accounting Policies (Supplemental Condensed Consolidated Statements of Cash Flows Information) (Details) - USD ($)	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Supplemental disclosure of cash activities:
Cash paid for interest	$ 12,273,000	$ 15,467,000
Supplemental disclosure of non-cash activities:
Capitalization of interest and financing costs	1,035,000	2,449,000
Buildings and improvements included in accounts payable and accrued liabilities	4,885,000	$ 654,000
Payoff of mortgages through mortgage assumptions	$ 157,925,000