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Summary of Significant Accounting Policies (Other) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Schedule of CRDA Deposits [Line Items] |  |  |
Cash and cash equivalents, maturity of qualifying investments, maximum | 3 months |  |
Restricted cash, maturity of qualifying investments, maximum | 90 days |  |
Interest Costs Capitalized | $ 100 | $ 1,400 | $ 1,100
Self Insurance Reserve [Roll Forward] |  |  |
Self insurance reserve, beginning balance | 33,004 | 32,507 | 30,654
Additions |  |  |
Charged to costs and expenses | 80,311 | 80,734 | 90,903
Payments made | (83,247) | (80,237) | (89,050)
Self insurance reserve, ending balance | 30,068 | 33,004 | 32,507
Gaming taxes | 332,100 | 330,800 | 347,500
Advertising expense | 33,400 | 32,200 | 30,400
Corporate expense | $ 76,941 | $ 75,626 | $ 63,249
Borgata |  |  |
Schedule of CRDA Deposits [Line Items] |  |  |
Ownership percentage by noncontrolling owners | 50.00% |  |

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