Leases Schedule of Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Total finance lease cost	$ 2,950	$ 8,384
Total operating lease cost	25,036	77,370
Total lease cost	27,986	85,754
Depreciation and Amortization [Member]
Amortization of right-of-use assets, Finance leases	2,069	5,830
Interest Expense [Member]
Interest on lease liability, Finance leases	881	2,554
Equipment Rents and Trackage Rights [Member]
Operating lease cost	22,292	66,976
Short-term lease cost	2,071	7,064
Variable lease cost	1,964	6,871
Operating Revenues [Member]
Sublease income (gross basis)	$ (1,291)	$ (3,541)