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Long-Term Debt (Maximum Secured Leverage Ratio) (Details) - Boyd
Dec. 31, 2015
Line of Credit Facility [Line Items]  
Maximum secured leverage ratio 4.25
Four Fiscal Quarters Ending March 31, 2015 through December 31, 2016  
Line of Credit Facility [Line Items]  
Maximum secured leverage ratio 4.75
Four Fiscal Quarters Ending March 31, 2017 through December 31, 2017  
Line of Credit Facility [Line Items]  
Maximum secured leverage ratio 4.50
Four Fiscal Quarters Ended March 31, 2018 and Thereafter  
Line of Credit Facility [Line Items]  
Maximum secured leverage ratio 4.25