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Acquisitions and Divestitures Asset Divestiture - Borgata (Details) - USD ($) $ in Thousands |  |  | 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 |  |  | $ 595,088 | $ 591,542 | $ 604,124 | $ 610,065 | $ 558,649 | $ 535,173 | $ 548,784 | $ 556,653 |  | $ 2,400,819 | $ 2,199,259 | $ 2,214,831
Equity Method Investment, Ownership Percentage |  |  | 50.00% |  |  |  |  |  |  |  |  | 50.00% |  |
Proceeds from Divestiture of Businesses |  | $ 900,000 |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Divestiture of Businesses, Net of Cash Divested |  | $ 589,000 |  |  |  |  |  |  |  |  |  |  |  |
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax |  |  |  |  |  |  |  |  |  |  |  | $ 181,700 |  |
Costs and Expenses |  |  |  |  |  |  |  |  |  |  |  | 2,057,018 | 1,938,851 | 1,943,247
Operating Income (Loss) |  |  | $ 80,477 | 78,940 | 89,554 | 94,830 | 29,726 | 67,881 | 80,439 | 82,362 |  | 343,801 | 260,408 | 271,584
Increase (decrease) in fair value of derivative instruments |  |  |  |  |  |  |  |  |  |  |  | 173,108 | 212,692 | 224,590
Gain Loss on Early Retirements of Debt |  |  |  |  |  |  |  |  |  |  |  | (1,582) | (42,364) | (40,733)
Income Tax Expense (Benefit) |  |  |  |  |  |  |  |  |  |  |  | 3,115 | (199,933) | (6,625)
Net Income (Loss) Attributable to Parent |  |  | $ 82,073 | $ 23,157 | $ 48,709 | $ 35,451 | $ 12,059 | $ 344,904 | $ 29,972 | $ 33,296 |  | $ 189,390 | 420,231 | 47,607
Borgata |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Revenues |  |  |  |  |  |  |  |  |  |  | $ 485,510 |  |  | 804,166
Equity Method Investment, Ownership Percentage |  |  | 50.00% |  |  |  |  |  |  |  |  | 50.00% |  |
Discontinued Operation, Tax Effect of Gain (Loss) from Disposal of Discontinued Operation |  |  |  |  |  |  |  |  |  |  |  | $ 14,800 | $ 9,100 |
Refund From Tax Settlement | $ 72,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax |  |  |  |  |  |  |  |  |  |  |  | $ 36,200 |  |
Costs and Expenses |  |  |  |  |  |  |  |  |  |  | 366,812 |  |  | 657,324
Operating Income (Loss) |  |  |  |  |  |  |  |  |  |  | 118,698 |  |  | 146,842
Increase (decrease) in fair value of derivative instruments |  |  |  |  |  |  |  |  |  |  | 26,378 |  |  | 59,681
Gain Loss on Early Retirements of Debt |  |  |  |  |  |  |  |  |  |  | 1,628 |  |  | 18,895
Income Tax Expense (Benefit) |  |  |  |  |  |  |  |  |  |  | 8,274 |  |  | (3,731)
Net Income (Loss) Attributable to Parent |  |  |  |  |  |  |  |  |  |  | $ 82,418 |  |  | $ 71,997
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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