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Summary of Significant Accounting Policies (Schedule Of Restricted Deposits and Escrows) (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Jun. 30, 2019
Accounting Policies [Abstract]      
Restricted deposits $ 13,635 $ 12,793  
Escrows 428 1,017  
Total $ 14,063 $ 13,810 $ 14,854