v2.4.0.6
Fair Value Measurements (Narrative-Balances Measured at Fair Value) (Details) (USD $)
In Millions, unless otherwise specified
0 Months Ended 3 Months Ended
Dec. 20, 2011
Kansas Star
Mar. 31, 2013
Earnout on Excess of EBITDA in 2015
Kansas Star
Mar. 31, 2013
Peninsula Gaming
Dec. 31, 2012
Peninsula Gaming
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Earnout Threshold, EBITDA of Certain Properties   $ 105.0    
Earnout Multiple   7.5    
Contingent Consideration, Kansas Star earnout     9.0 9.8
Payment to Option Holder, Percentage of EBITDA 1.00%      
Payment to Option Holder, Term 10 years      
Contingent Consideration, Liability for Payments to Option Holder, Current     0.9  
Contingent Consideration, Liability for Payments to Option Holder, Noncurrent     $ 3.6