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Related Party Transactions - Additional Information (Detail) $ in Thousands, shares in Millions |  |  |  |  |  |  |  | 1 Months Ended | 2 Months Ended | 12 Months Ended
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Apr. 01, 2020 USD ($) | Feb. 14, 2020 USD ($) | Apr. 01, 2019 USD ($) | Mar. 07, 2019 USD ($) shares | Jan. 29, 2019 USD ($) | Jan. 02, 2019 USD ($) | Sep. 01, 2016 USD ($) shares | Jan. 31, 2019 USD ($) | Mar. 31, 2020 USD ($) | Dec. 31, 2020 USD ($) Term | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | $ 5,162,082 | $ 12,899,672 | $ 11,763,096
Other accrued liabilities |  |  |  |  |  |  |  |  |  | $ 1,545,079 | 2,024,002 |
Initial lease term |  |  |  |  |  |  |  |  |  | 10 years |  |
Lease, number of extensions | Term |  |  |  |  |  |  |  |  |  | 4 |  |
Lease, additional extended terms |  |  |  |  |  |  |  |  |  | 5 years |  |
Leasing arrangement description of rent |  |  |  |  |  |  |  |  |  | the possibility for additional 2% increases thereafter subject to the Company meeting an adjusted net revenue to rent ratio, as well as potential increases in percentage rent in year six and every five years thereafter based on a percentage of average actual annual net revenue during the preceding five year period calculated in accordance with the terms under the master lease |  |
Total purchase price |  |  |  | $ 638,000 |  |  |  |  |  |  |  |
Purchase price in cash |  |  |  | 606,000 |  |  |  |  |  |  |  |
Empire City [Member] |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total purchase price |  |  |  |  | $ 865,000 |  |  |  |  |  |  |
Empire City [Member] | Developed Real Property [Member] |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total purchase price |  |  |  |  |  |  |  | $ 634,000 |  |  |  |
Liabilities incurred for acquisition |  |  |  |  |  |  |  | 246,000 |  |  |  |
Increase in annual rent payment |  |  |  |  |  |  |  | $ 50,000 |  |  |  |
Annual fixed rent, percentage |  |  |  |  |  |  |  | 90.00% |  |  |  |
Increase in annual rent per year, percentage |  |  |  |  |  |  |  | 2.00% |  |  |  |
Northfield OpCo [Member] |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total purchase price |  |  |  | 305,000 |  |  |  |  |  |  |  |
Base Rent [Member] |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Percentage of initial total rent payments due |  |  |  |  |  |  |  |  |  | 91.00% |  |
Fixed annual rent escalator percentage |  |  |  |  |  |  |  |  |  | 2.00% |  |
Additional annual rent escalator percentage |  |  |  |  |  |  |  |  |  | 2.00% |  |
Percentage Rent [Member] |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Percentage of initial total rent payments due |  |  |  |  |  |  |  |  |  | 9.00% |  |
Master Lease [Member] |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Fixed annual rent escalator percentage |  |  | 2.00% |  |  |  |  |  |  |  |  |
Increase in annual rent payment |  |  |  | $ 50,000 |  |  |  |  |  |  |  |
Annual fixed rent, percentage | 2.00% |  |  | 90.00% |  |  |  |  |  |  |  |
Increase in annual rent per year, percentage |  |  |  | 2.00% |  |  |  |  |  |  |  |
Annual rent | $ 828,000 | $ 813,000 | $ 946,000 |  |  |  |  | $ 770,000 | $ 813,000 |  |  |
Decrease in annual rent payment |  | $ 133,000 |  |  |  |  |  |  |  |  |  |
Master Lease [Member] | Empire City [Member] |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Increase in additional rent payment |  |  |  |  |  | $ 50,000 |  |  |  |  |  |
Master Lease [Member] | Northfield OpCo [Member] |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Increase in annual rent payment |  |  |  | $ 60,000 |  |  |  |  |  |  |  |
Annual fixed rent, percentage |  |  |  | 90.00% |  |  |  |  |  |  |  |
Increase in annual rent per year, percentage |  |  |  | 2.00% |  |  |  |  |  |  |  |
Master Lease [Member] | MGM Northfield Park [Member] |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Increase in additional rent payment |  |  | $ 60,000 |  |  |  |  |  |  |  |  |
MGM China [Member] |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Advertising expenses |  |  |  |  |  |  |  |  |  | $ 1,000 | 6,000 |
Ordinary shares acquired | shares |  |  |  |  |  |  | 188.1 |  |  |  |  |
Grand Paradise Macau [Member] |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Deferred cash payment |  |  |  |  |  |  | $ 50,000 |  |  |  |  |
Grand Paradise Macau [Member] | Other Accrued Liabilities [Member] |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Other accrued liabilities |  |  |  |  |  |  |  |  |  |  | 33,000 |
Grand Paradise Macau [Member] | Other Long-Term Obligations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Other liabilities on discounted basis |  |  |  |  |  |  |  |  |  | 34,000 |  |
MGM Growth Properties LLC [Member] | Northfield OpCo [Member] |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Redemption of operating partnership units | shares |  |  |  | 9.0 |  |  |  |  |  |  |  |
Shun Tak [Member] | MGM China [Member] |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Expenses incurred |  |  |  |  |  |  |  |  |  | 7,000 | 16,000 | 17,000
Ms Ho Pansy Catilina Chiu King [Member] | MGM Branding and Development [Member] |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Distribution made to noncontrolling interests |  |  |  |  |  |  |  |  |  | $ 5,000 | 20,000 | 22,000
Blackstone Real Estate Income Trust [Member] | MGP [Member] | Lease Agreements [Member] |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest |  |  |  |  |  |  |  |  |  | 50.10% |  |
Blackstone Real Estate Income Trust [Member] | Bellagio BREIT Venture [Member] | Real Estate Assets and Leases [Member] |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest |  |  |  |  |  |  |  |  |  | 5.00% |  |
CityCenter Holdings, LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | $ 16,000 | 48,000 | 47,000
CityCenter Holdings, LLC [Member] | Aria and Vdara [Member] |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Management fee as a percentage of revenue |  |  |  |  |  |  |  |  |  | 2.00% |  |
Management fee received, percentage of EBITDA |  |  |  |  |  |  |  |  |  | 5.00% |  |
CityCenter Holdings, LLC [Member] | Management Services and Reimbursable Costs [Member] |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Reimbursable costs for support services provided |  |  |  |  |  |  |  |  |  | $ 212,000 | 420,000 | $ 409,000
Receivable related to management services and reimbursable costs |  |  |  |  |  |  |  |  |  | $ 39,000 | $ 66,000 |

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