Summary of Significant Accounting Policies (Supplemental Consolidated Statements of Cash Flows Information) (Details) - USD ($)	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Supplemental disclosure of cash activities:
Cash paid for interest	$ 9,419,000	$ 10,547,000
Supplemental disclosure of non-cash activities:
Capitalization of interest and financing costs	1,035,000	1,555,000
Buildings and improvements included in accounts payable and accrued liabilities	$ 3,764,000	$ 1,224,000