Leases (Details Textual) $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($) railcar	Dec. 31, 2019 railcar
Operating Leased Assets [Line Items]
Lessee, Lease, Number of Railcars Leased | railcar	6,700
Sublease Income | $	$ 64.3
Number of railcars received | railcar	732	157
Repayment of Long Term Finance Lease Obligations | $	$ 40.0