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Summary of Significant Accounting Policies (Schedule Of Restricted Deposits and Escrows) (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Jun. 30, 2020
Accounting Policies [Abstract]      
Restricted deposits $ 11,397 $ 12,122  
Escrows 305 216  
Total $ 11,702 $ 12,338 $ 14,063