Leases (Summary of Amounts Recognized in Condensed Consolidated Balance Sheet) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Assets
Operating lease assets	$ 76,401	$ 0
Finance lease assets	23,723
Total leased assets	117,589
Liabilities
Current operating leases	25,700
Non-current operating leases	51,091	0
Total operating lease liabilities	76,791
Finance lease liability	17,636	0
Finance lease liability	21,501	$ 0
Total finance lease liabilities	39,137
Total lease liabilities	115,928
Rail
Assets
Finance lease assets	$ 17,465