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Leases (Book Value Of Assets Under Operating Leases From Owned Assets) (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Property Subject to or Available for Operating Lease [Line Items]    
Net Book Value $ 41,388 $ 47,546
Building And Improvements [Member]    
Property Subject to or Available for Operating Lease [Line Items]    
Gross balance 59,694 67,766
Accumulated depreciation $ (18,306) $ (20,220)