Property and Equipment, Net (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 5,581,057,000		$ 5,581,057,000		$ 5,519,236,000
Less accumulated depreciation	2,060,649,000		2,060,649,000		1,977,128,000
Property and equipment, net	3,520,408,000		3,520,408,000		3,542,108,000
Depreciation expense	49,500,000	46,400,000	98,400,000	92,100,000
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	614,697,000		614,697,000		614,697,000
Building and Improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	3,529,008,000		3,529,008,000		3,513,230,000
Furniture and Equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,217,378,000		1,217,378,000		1,185,737,000
Riverboats and Barges
Property, Plant and Equipment [Line Items]
Property and equipment, gross	168,237,000		168,237,000		168,204,000
Other
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 51,737,000		$ 51,737,000		$ 37,368,000