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Asset Acquisitions (Acquired Property and Equipment) (Details)
12 Months Ended
Dec. 31, 2016
Building and Improvements | Minimum  
Business Acquisition [Line Items]  
Property and equipment, useful lives 3 years
Building and Improvements | Maximum  
Business Acquisition [Line Items]  
Property and equipment, useful lives 40 years
Furniture and Equipment | Minimum  
Business Acquisition [Line Items]  
Property and equipment, useful lives 1 year
Furniture and Equipment | Maximum  
Business Acquisition [Line Items]  
Property and equipment, useful lives 10 years
Riverboats | Minimum  
Business Acquisition [Line Items]  
Property and equipment, useful lives 5 years
Riverboats | Maximum  
Business Acquisition [Line Items]  
Property and equipment, useful lives 40 years