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Acquisitions and Divestitures Asset Divestiture - Borgata (Details) - USD ($) |  |  | 3 Months Ended | 7 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Feb. 16, 2017 | Aug. 02, 2016 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Jul. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Revenues |  |  | $ 590,832,000 | $ 587,665,000 | $ 599,868,000 | $ 605,342,000 | $ 554,823,000 | $ 531,901,000 | $ 544,874,000 | $ 552,378,000 |  | $ 2,383,707,000 | $ 2,183,976,000 | $ 2,199,432,000
Equity Method Investment, Ownership Percentage |  |  | 50.00% |  |  |  |  |  |  |  |  | 50.00% |  |
Proceeds from Divestiture of Businesses |  | $ 900,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Divestiture of Businesses, Net of Cash Divested |  | $ 589,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax |  |  |  |  |  |  |  |  |  |  |  | $ 181,700,000 |  |
Costs and Expenses |  |  |  |  |  |  |  |  |  |  |  | 2,040,212,000 | 1,923,349,000 | 1,928,230,000
Operating Income (Loss) |  |  | $ 80,601,000 | 78,665,000 | 89,361,000 | 94,868,000 | 29,971,000 | 67,916,000 | 80,490,000 | 82,250,000 |  | 343,495,000 | 260,627,000 | 271,202,000
Increase (decrease) in fair value of derivative instruments |  |  |  |  |  |  |  |  |  |  |  | 173,108,000 | 212,692,000 | 224,590,000
Gain Loss on Early Retirements of Debt |  |  |  |  |  |  |  |  |  |  |  | (1,582,000) | (42,364,000) | (40,733,000)
Income Tax Expense (Benefit) |  |  |  |  |  |  |  |  |  |  |  | 3,006,000 | (197,486,000) | (6,634,000)
Net Income (Loss) Attributable to Parent |  |  | $ 82,150,000 | $ 22,976,000 | $ 48,578,000 | $ 35,489,000 | $ 12,220,000 | $ 342,571,000 | $ 30,022,000 | $ 33,190,000 |  | $ 189,193,000 | 418,003,000 | 47,234,000
Borgata |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Revenues |  |  |  |  |  |  |  |  |  |  | $ 485,510,000 |  |  | 804,166,000
Equity Method Investment, Ownership Percentage |  |  | 50.00% |  |  |  |  |  |  |  |  | 50.00% |  |
Discontinued Operation, Tax Effect of Gain (Loss) from Disposal of Discontinued Operation |  |  |  |  |  |  |  |  |  |  |  | $ 14,800,000 | $ 9,100,000 |
Refund From Tax Settlement | $ 72,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax |  |  |  |  |  |  |  |  |  |  |  | $ 36,200,000 |  |
Costs and Expenses |  |  |  |  |  |  |  |  |  |  | 366,812,000 |  |  | 657,324,000
Operating Income (Loss) |  |  |  |  |  |  |  |  |  |  | 118,698,000 |  |  | 146,842,000
Increase (decrease) in fair value of derivative instruments |  |  |  |  |  |  |  |  |  |  | 26,378,000 |  |  | 59,681,000
Gain Loss on Early Retirements of Debt |  |  |  |  |  |  |  |  |  |  | 1,628,000 |  |  | 18,895,000
Income Tax Expense (Benefit) |  |  |  |  |  |  |  |  |  |  | 8,274,000 |  |  | (3,731,000)
Net Income (Loss) Attributable to Parent |  |  |  |  |  |  |  |  |  |  | $ 82,418,000 |  |  | $ 71,997,000
MDDHC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  | 1.00% |  |  |  |  |  |  |  |  | 1.00% |  |
Subsidiaries [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  | 49.00% |  |  |  |  |  |  |  |  | 49.00% |  |

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