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Investment Activity (Schedule of Supplemental Balance Sheet Information Related to Lease) (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Assets:    
Buildings and improvements - right of use asset $ 1,562 $ 1,599
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Buildings and improvements Buildings and improvements
Liabilities [Abstract]    
Accounts payable and accrued expenses - lease liability $ 1,705 $ 1,724
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] Accounts payable and accrued expenses Accounts payable and accrued expenses