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Goodwill (Schedule of Goodwill By Segment) (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Sep. 27, 2016 | Dec. 31, 2014
Goodwill [Line Items] |  |  |  |  |
Goodwill, net | $ 888,224 | $ 826,476 | $ 685,310 |  | $ 685,310
Gross carrying value | 1,072,299 |  |  |  |
Cumulative amortization | (6,134) |  |  |  |
Goodwill, Impairment Loss | 0 | 12,462 | $ 0 |  |
Goodwill, Impaired, Accumulated Impairment Loss | 177,941 |  |  |  |
Las Vegas Locals |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill, net | 428,088 |  |  |  |
Gross carrying value | 593,567 |  |  |  |
Cumulative amortization | 0 |  |  |  |
Goodwill, Impaired, Accumulated Impairment Loss | 165,479 |  |  |  |
Downtown Las Vegas |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill, net | 863 |  |  |  |
Gross carrying value | 6,997 |  |  |  |
Cumulative amortization | (6,134) |  |  |  |
Goodwill, Impaired, Accumulated Impairment Loss | 0 |  |  |  |
Midwest and South |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill, Impairment Loss |  | 12,500 |  |  |
Peninsula |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill, net | 459,273 |  |  |  |
Gross carrying value | 471,735 |  |  |  |
Cumulative amortization | 0 |  |  |  |
Goodwill, Impaired, Accumulated Impairment Loss | 12,462 |  |  |  |
Subsidiaries [Member] |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill, net | $ 61,700 | $ 153,600 |  | $ 130,324 |

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