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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, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Jul. 31, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  | $ 791,623 | $ 612,196 | $ 616,793 | $ 606,118 | $ 595,088 | $ 591,542 | $ 604,124 | $ 610,065 |  | $ 2,626,730 | $ 2,400,819 | $ 2,199,259
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 |  |  |  |  |  |  |  |  |  |  |  | 2,271,446 | 2,057,018 | 1,938,851
Operating Income (Loss) |  |  | $ 94,684 | 69,568 | 96,258 | 94,774 | 80,477 | 78,940 | 89,554 | 94,830 |  | 355,284 | 343,801 | 260,408
Interest expense, net of amounts capitalized |  |  |  |  |  |  |  |  |  |  |  | 204,188 | 173,108 | 212,692
Gain Loss on Early Retirements of Debt |  |  |  |  |  |  |  |  |  |  |  | (61) | (1,582) | (42,364)
Income Tax Expense (Benefit) |  |  |  |  |  |  |  |  |  |  |  | 40,331 | 3,115 | (199,933)
Net Income (Loss) Attributable to Parent |  |  | $ 22,867 | $ 11,837 | $ 38,945 | $ 41,399 | $ 82,073 | $ 23,157 | $ 48,709 | $ 35,451 |  | $ 115,048 | 189,390 | 420,231
Borgata |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  | $ 485,510 |  |  |
Equity Method Investment, Ownership Percentage |  |  | 50.00% |  |  |  |  |  |  |  |  | 50.00% |  |
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax |  |  |  |  |  |  |  |  |  |  |  | $ 300 |  |
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 |  |  |
Operating Income (Loss) |  |  |  |  |  |  |  |  |  |  | 118,698 |  |  |
Interest expense, net of amounts capitalized |  |  |  |  |  |  |  |  |  |  | 26,378 |  |  |
Gain Loss on Early Retirements of Debt |  |  |  |  |  |  |  |  |  |  | 1,628 |  |  |
Income Tax Expense (Benefit) |  |  |  |  |  |  |  |  |  |  | 8,274 |  |  |
Net Income (Loss) Attributable to Parent |  |  |  |  |  |  |  |  |  |  | $ 82,418 |  |  |
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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