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Acquisition - Schedule of Purchase Price Allocation (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Jan. 29, 2019 | Dec. 31, 2018 | Jul. 06, 2018 | Dec. 31, 2017
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Fair value of assets acquired and liabilities assumed: |  |  |  |  |
Goodwill | $ 2,084,564 |  | $ 1,821,392 |  | $ 1,806,531
MGM Growth Properties LLC [Member] | Empire City [Member] |  |  |  |  |
Fair value of assets acquired and liabilities assumed: |  |  |  |  |
Property and equipment |  | $ 645,733 |  |  |
Cash and cash equivalents |  | 63,197 |  |  |
Racing and gaming license |  | 52,000 |  |  |
Other intangible assets |  | 34,000 |  |  |
Goodwill |  | 256,133 |  |  |
Other assets |  | 24,420 |  |  |
Deferred income taxes |  | (125,149) |  |  |
Other liabilities |  | (85,690) |  |  |
Business combination, assets acquired and liabilities assumed |  | $ 864,644 |  |  |
MGM Growth Properties LLC [Member] | Northfield Park associates LLC [Member] |  |  |  |  |
Fair value of assets acquired and liabilities assumed: |  |  |  |  |
Property and equipment |  |  |  | $ 792,807 |
Cash and cash equivalents |  |  |  | 35,831 |
Racing and gaming license |  |  |  | 228,000 |
Customer list |  |  |  | 25,000 |
Goodwill |  |  |  | 17,915 |
Other assets |  |  |  | 9,598 |
Other liabilities |  |  |  | (38,786) |
Business combination, assets acquired and liabilities assumed |  |  |  | $ 1,070,365 |

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