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Mortgage Loans On Real Estate (Schedule Of Reconciliation On Real Estate) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Abstract]    
Beginning Balance $ 45,734
New mortgage loan/(repayments)   44,695
New mortgage loan/(repayment) (3,000)  
Accrued interest 2,508 1,039
Ending Balance $ 45,242 $ 45,734