Property and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Plant and equipment
Property and equipment, net	$ 2,827,717		$ 2,827,717		$ 2,820,383
Decrease in property and equipment			(7,300)
Depreciation expense	63,700	$ 65,700	128,700	$ 131,300
Interest capitalized in connection with major construction projects	100	0	100	0
Master Lease Agreement
Plant and equipment
Depreciation expense	23,000		45,700
Land and improvements - non-leased
Plant and equipment
Property and equipment	294,535		294,535		294,590
Land and improvements - master lease
Plant and equipment
Property and equipment	435,043		435,043		382,246
Building and improvements - non-leased
Plant and equipment
Property and equipment	405,024		405,024		404,158
Buildings and improvements - master lease
Plant and equipment
Property and equipment	2,248,257		2,248,257		2,219,018
Furniture, Fixtures and Equipment
Plant and equipment
Property and equipment	1,374,884		1,374,884		1,355,615
Leasehold Improvements
Plant and equipment
Property and equipment	119,730		119,730		118,940
Construction in progress - non-leased
Plant and equipment
Property and equipment	38,619		38,619		16,375
Non-leased assets
Plant and equipment
Property and equipment	2,232,792		2,232,792		2,189,678
Less Accumulated depreciation	(1,296,962)		(1,296,962)		(1,224,596)
Property and equipment, net	935,830		935,830		965,082
Master lease assets
Plant and equipment
Property and equipment	2,683,300		2,683,300		2,601,264
Less Accumulated depreciation	(791,413)		(791,413)		(745,963)
Property and equipment, net	$ 1,891,887		$ 1,891,887		$ 1,855,301
Depreciation expense		$ 22,800		$ 45,700