Property and Equipment - Property and Equipment, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Plant and equipment
Property and equipment, net	$ 5,227,922	$ 5,297,097	$ 6,868,768
Operating Leases - Master Leases
Plant and equipment
Property and equipment, net		(1,407,357)
Finance Leases - Dayton and Mahoning Valley
Plant and equipment
Property and equipment, net		(164,314)
Property and equipment - non-Master Leases
Plant and equipment
Property and equipment, gross	2,479,855		2,431,177
Less: Accumulated depreciation	(1,442,955)		(1,400,198)
Property and equipment, net	1,036,900		1,030,979
Land and improvements
Plant and equipment
Property and equipment, gross	343,987		343,987
Building, vessels and improvements
Plant and equipment
Property and equipment, gross	347,479		342,944
Furniture, fixtures and equipment
Plant and equipment
Property and equipment, gross	1,599,050		1,565,830
Leasehold improvements
Plant and equipment
Property and equipment, gross	153,872		152,943
Construction in progress
Plant and equipment
Property and equipment, gross	35,467		25,473
Property and equipment - Master Leases
Plant and equipment
Property and equipment, gross	5,190,545		6,816,031
Less: Accumulated depreciation	(999,523)		(978,242)
Property and equipment, net	4,191,022		5,837,789
Land and improvements
Plant and equipment
Property and equipment, gross	1,525,934		2,970,969
Land and improvements | Operating Leases - Master Leases
Plant and equipment
Property and equipment, gross		(1,400,000)
Building, vessels and improvements
Plant and equipment
Property and equipment, gross	$ 3,664,611		$ 3,845,062
Building, vessels and improvements | Finance Leases - Dayton and Mahoning Valley
Plant and equipment
Property and equipment, gross		$ (180,400)