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Non-Recourse Debt (Narrative) (Details)
$ in Millions
3 Months Ended
Mar. 31, 2020
USD ($)
Debt Instrument [Line Items]  
Gross operating lease rentals and future payments on direct financing leases $ 3.5
Assets pledged as collateral $ 6.7
Notes maturity date, description The notes mature from 2020 through 2028
Minimum [Member]  
Debt Instrument [Line Items]  
Fixed interest rate on notes 3.70%
Maximum [Member]  
Debt Instrument [Line Items]  
Fixed interest rate on notes 4.66%