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Leases (Schedule Of Supplemental Balance Sheet Information Related To Leases) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Leases [Abstract]    
Right-of-use assets $ 2,505,466 $ 0
Current lease liabilities 173,139 0
Non-current lease liabilities 2,678,374 $ 0
Total lease liabilities $ 2,851,513  
Weighted average remaining lease term (years) 13 years 4 months 24 days  
Weighted average discount rate 5.19%