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Acquisitions and Divestitures Investment in and Divestiture of Business (Details) $ in Thousands |  | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Aug. 02, 2016 USD ($) | Jun. 30, 2018 USD ($) | Jun. 30, 2018 USD ($) property | Jun. 30, 2017 USD ($) | Jun. 30, 2018 USD ($) | Jun. 30, 2017 USD ($) | Jun. 01, 2018 USD ($) | Dec. 31, 2017 USD ($) | Jan. 31, 2010
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Number of Lattner Gaming Units | property |  |  | 1,000 |  |  |  |  |  |
Number of Lattner Locations | property |  |  | 220 |  |  |  |  |  |
Gross Revenues |  |  | $ 616,793 | $ 604,124 | $ 1,222,911 | $ 1,214,189 |  |  |
Goodwill, net |  | $ 976,018 | 976,018 |  | 976,018 |  |  | $ 888,224 |
Depreciation and amortization |  |  | 53,923 | 52,563 | 105,199 | 106,527 |  |  |
Net income |  |  | 38,945 | 48,709 | 80,344 | 84,160 |  |  |
Project development, preopening and writedowns |  |  | $ 5,801 | 2,784 | 9,241 | 5,756 |  |  |
Lattner Entertainment Group Illinois, LLC [Domain] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Gross Revenues |  | 3,481 |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets |  |  |  |  |  |  | $ 9,889 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment |  |  |  |  |  |  | 9,063 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets |  |  |  |  |  |  | 4,033 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets |  |  |  |  |  |  | 22,985 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities |  |  |  |  |  |  | 1,062 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities |  |  |  |  |  |  | 1,062 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net |  |  |  |  |  |  | 21,923 |  |
Business Combination, Net Purchase Price |  |  |  |  |  |  | 100,700 |  |
Goodwill, net |  |  |  |  |  |  | 88,615 |  |
Business Combination, Transferred |  |  |  |  |  |  | 110,538 |  |
Net income |  | $ 438 |  |  |  |  |  |  |
Project development, preopening and writedowns |  |  |  |  | 500 |  |  |  |
Penn National Gaming, Inc. [Domain] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Business Combination, Transferred |  |  |  |  | 575,000 |  |  |  |
Valley Forge Convention Center Partners, L.P. [Domain] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Business Combination, Transferred |  |  |  |  | 280,500 |  |  |  |
Subsidiary, Borgata |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  |  |  | 50.00%
Proceeds from Divestiture of Businesses | $ 900,000 |  |  |  |  |  |  |  |
Proceeds from Divestiture of Businesses, Net of Cash Divested | 589,000 |  |  |  |  |  |  |  |
Refund From Tax Settlement | $ 72,000 |  |  |  |  |  |  |  |
Borgata [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax |  |  |  | 35,600 | $ 300 | 36,200 |  |  |
Discontinued Operation, Tax Effect of Gain (Loss) from Disposal of Discontinued Operation |  |  |  | $ 14,600 |  | $ 14,800 |  |  |
Buildings and improvements | Lattner Entertainment Group Illinois, LLC [Domain] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment |  |  |  |  |  |  | 14 |  |
Furniture and equipment | Lattner Entertainment Group Illinois, LLC [Domain] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment |  |  |  |  |  |  | $ 9,049 |  |

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