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Leased Railcars (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Leases [Abstract]    
Railcars Available for Lease, net $ 38,900 $ 64,755
Railcars Available for Lease, cost 43,045 70,850
Railcars Available for Lease, accumulated depreciation $ 4,145 6,095
Lease term 5 years 6 months  
Depreciation Expense on Leased Railcars $ 1,365 $ 1,458