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Income Taxes (Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Mar. 31, 2015 | Aug. 14, 2013 | Dec. 31, 2012
Income Tax Contingency [Line Items] |  |  |  |  |  |
Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority | $ 1,100 |  |  | $ 2,400 | $ 4,200 |
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |  |  |  |
Unrecognized tax benefit, beginning of year |  | $ 30,198 | $ 37,059 |  |  | $ 38,423
Tax positions related to current year | 0 | 487 | 562 |  |  |
Tax positions related to prior years | 0 | 0 | 138 |  |  |
Unrecognized Tax Benefits, Decrease Resulting from Deconsolidation | 0 | 6,221 | 0 |  |  |
Tax positions related to the Deconsolidation of Borgata | 27,716 | 30 | 2,064 |  |  |
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations | 0 |  | 0 |  |  |
Settlement with taxing authorities | 0 |  | 0 |  |  |
Unrecognized tax benefits | 2,482 | 30,198 | 37,059 |  |  |
Income tax penalties and interest expense | 100 | 6,500 | $ 1,100 |  |  |
Income tax penalties and interest accrued | 700 | 7,200 |  |  |  |
Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities, Portion Which Affected Effective Tax Rate |  | 19,700 |  |  |  |
Internal Revenue Service (IRS) |  |  |  |  |  |
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |  |  |  |
Unrecognized tax benefits that would impact effective tax rate | 2,500 |  |  |  |  |
Current year [Member] |  |  |  |  |  |
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |  |  |  |
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations |  | 1,097 |  |  |  |
Settlement with taxing authorities |  | 0 |  |  |  |
All years [Member] |  |  |  |  |  |
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |  |  |  |
Settlement with taxing authorities |  | $ (27,700) |  |  |  |
Minimum |  |  |  |  |  |
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |  |  |  |
Estimated decrease in recognized tax beneifts over next 12 months, minimum | $ 200 |  |  |  |  |

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- Definition Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities, Portion Which Affected Effective Tax Rate + References No definition available. + Details
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- Definition Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d)(3) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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- Definition Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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