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Property, Plant and Equipment and Railcars on Leases, net (Details 1)
$ in Thousands
Jun. 30, 2018
USD ($)
Operating Leases, Future Minimum Payments Receivable [Abstract]  
Remaining 6 months of 2018 $ 65,698
2019 113,777
2020 76,330
2021 57,805
2022 38,206
2023 and thereafter 82,150
Total $ 433,966