v2.4.0.8

Summary of Significant Accounting Policies (CRDA) (Details) (USD $) | 3 Months Ended | 9 Months Ended |  |  |  | 9 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 New Jersey Casino Reinvestment Development Authority (CRDA) | Jun. 30, 2013 New Jersey Casino Reinvestment Development Authority (CRDA) | Sep. 30, 2013 Other Assets New Jersey Casino Reinvestment Development Authority (CRDA) | Dec. 31, 2012 Other Assets New Jersey Casino Reinvestment Development Authority (CRDA) | Sep. 30, 2013 State of New Jersey | Jun. 30, 2013 Subsidiary, Borgata
Schedule of CRDA Deposits [Line Items] |  |  |  |  |  |  |  |  |  |
State Gaming Licenses, Annual Fee, Percentage of Licensee Gross Gaming Revenues |  |  |  |  |  |  |  |  | 1.25% |
State Alternative Investment Tax, Percentage of Gross Gaming Revenues |  |  |  |  |  |  |  |  | 2.50% |
Deposits with CRDA |  |  |  |  |  |  | $ 3,700,000 | $ 28,500,000 |  |
Deposit assets included in CRDA settlement agreement to be donated, percentage |  |  |  |  |  | 50.00% |  |  |  |
Deposit assets included in settlement agreement to be refunded, percentage |  |  |  |  |  |  |  |  |  | 50.00%
Deposit assets included in CRDA settlement agreement |  |  |  |  |  | 45,100,000 |  |  |  |
Impairments of assets | $ 1,250,000 | $ 0 | $ 6,282,000 | $ 0 | $ 5,000,000 |  |  |  |  |

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