Summary of Significant Accounting Policies (Property, Plant and Equipment Useful Lives) (Details)	6 Months Ended
	Jun. 30, 2012
Building and Improvements | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives	10 years
Building and Improvements | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives	40 years
Riverboats and Barges | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives	10 years
Riverboats and Barges | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives	40 years
Furniture and Equipment | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives	3 years
Furniture and Equipment | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives	10 years