Property and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Plant and equipment
Property and equipment, net	$ 2,894,742		$ 2,894,742		$ 2,980,068
Increase (decrease) in property and equipment			(85,300)
Depreciation expense	65,700		131,300
Interest capitalized in connection with major construction projects	0	$ 1,200	0	$ 1,800
Master Lease Agreement
Plant and equipment
Depreciation expense	22,800		45,700
Land and improvements - non-leased
Plant and equipment
Property and equipment	289,147		289,147		288,910
Land and improvements - master lease
Plant and equipment
Property and equipment	382,246		382,246		382,246
Building and improvements - non-leased
Plant and equipment
Property and equipment	401,693		401,693		396,497
Buildings and improvements - master lease
Plant and equipment
Property and equipment	2,219,018		2,219,018		2,219,018
Furniture, fixtures and equipment
Plant and equipment
Property and equipment	1,321,965		1,321,965		1,303,153
Leasehold improvements
Plant and equipment
Property and equipment	132,009		132,009		129,012
Construction in progress - non-leased
Plant and equipment
Property and equipment	14,028		14,028		9,175
Non-leased assets
Plant and equipment
Property and equipment	2,158,842		2,158,842		2,126,747
Less Accumulated depreciation	(1,164,816)		(1,164,816)		(1,093,115)
Property and equipment, net	994,026		994,026		1,033,632
Master lease assets
Plant and equipment
Property and equipment	2,601,264		2,601,264		2,601,264
Less Accumulated depreciation	(700,548)		(700,548)		(654,828)
Property and equipment, net	$ 1,900,716		$ 1,900,716		$ 1,946,436