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Summary of Significant Accounting Policies (Noncontrolling Interest) (Details)
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Dec. 31, 2012
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Dec. 31, 2011
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|---|---|---|
|
Borgata
|
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| Noncontrolling Interest [Line Items] | ||
| Ownership percentage by noncontrolling owners | 50.00% | 50.00% |
|
LVE
|
||
| Noncontrolling Interest [Line Items] | ||
| Ownership percentage by noncontrolling owners | 100.00% | |
|
LVE
|
||
| Noncontrolling Interest [Line Items] | ||
| Ownership percentage by noncontrolling owners | 100.00% |