v2.4.0.6

Related Party Transactions (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
William S. Boyd and His Immediate Family |  |  |
Related Party Transaction [Line Items] |  |  |
Ownership percentage | 37.00% |  |
Borgata |  |  |
Related Party Transaction [Line Items] |  |  |
Related party payables | $ 0.5 | $ 0.3 |
Ground leases property taxes | 15.6 | 14.0 | 12.9
Borgata | Selling, general and administrative |  |  |
Related Party Transaction [Line Items] |  |  |
Related party expenditures | 10.9 | 10.0 | 9.1
Ground leases rent expense | 5.8 | 5.1 | 5.4
Borgata | MGM |  |  |
Related Party Transaction [Line Items] |  |  |
Land subject to ground leases | 19.6 |  |
Ground leases rent expense | 0.1 | 0.1 | 0.2
Ground leases property taxes | $ 2.8 | $ 2.5 | $ 9.9

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