Property and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Plant and equipment
Property and equipment, net	$ 2,785,958		$ 2,785,958		$ 2,820,383
Decrease in property and equipment			(34,400)
Depreciation expense	62,100	$ 65,500	190,800	$ 196,800
Interest capitalized in connection with major construction projects			200	0
Master Lease Agreement
Plant and equipment
Depreciation expense	23,400		69,100
Land and improvements - non-leased
Plant and equipment
Property and equipment	294,693		294,693		294,590
Land and improvements - master lease
Plant and equipment
Property and equipment	424,720		424,720		382,246
Building and improvements - non-leased
Plant and equipment
Property and equipment	425,462		425,462		404,158
Buildings and improvements - master lease
Plant and equipment
Property and equipment	2,258,577		2,258,577		2,219,018
Furniture, Fixtures and Equipment
Plant and equipment
Property and equipment	1,381,991		1,381,991		1,355,615
Leasehold Improvements
Plant and equipment
Property and equipment	124,947		124,947		118,940
Construction in progress - non-leased
Plant and equipment
Property and equipment	17,876		17,876		16,375
Non-leased assets
Plant and equipment
Property and equipment	2,244,969		2,244,969		2,189,678
Less Accumulated depreciation	(1,327,812)		(1,327,812)		(1,224,596)
Property and equipment, net	917,157		917,157		965,082
Master lease assets
Plant and equipment
Property and equipment	2,683,297		2,683,297		2,601,264
Less Accumulated depreciation	(814,496)		(814,496)		(745,963)
Property and equipment, net	$ 1,868,801		$ 1,868,801		$ 1,855,301
Depreciation expense		$ 22,700		$ 68,400