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Related Party Transactions - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands |  |  |  | 1 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Aug. 04, 2021 | Apr. 01, 2021 | Mar. 31, 2021 | Oct. 31, 2021 | Mar. 31, 2021 | Sep. 30, 2021 | Sep. 30, 2020 | Mar. 15, 2021
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Cash proceeds for redemption |  |  |  |  |  | $ 50,828 | $ 3,205 |
VICI Properties, Inc |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Annual rent payments under master lease of properties | $ 860,000 |  |  |  |  |  |  |
Shares newly issued ( in shares) | 1.366 |  |  |  |  |  |  |
Cash consideration | $ 4,400,000 |  |  |  |  |  |  |
Ownership interest | $ 370,000 |  |  |  |  |  |  |
VICI Properties, Inc | MGP |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Fixed exchange ratio (in dollars per share) | $ 43 |  |  |  |  |  |  |
Real Estate Assets and Leases | Blackstone real estate income trust | Bellagio BREIT Venture |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Partnership interest |  |  |  |  |  | 5.00% |  |
MGP | Blackstone real estate income trust | Lease Agreements |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Partnership interest |  |  |  |  |  | 50.10% |  |
MGM Growth Properties LLC | Operating Partnership |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Operating partnership units redeemed (in shares) |  |  |  |  | 37,000,000 |  |  |
Cash proceeds for redemption |  |  |  |  | $ 1,200,000 |  |  |
Partnership interest |  |  | 42.10% |  | 42.10% |  |  | 42.10%
Master Lease |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Annual rent payments under master lease of properties |  | $ 843,000 | $ 828,000 |  |  |  |  |
Fixed annual rent escalator percentage |  | 2.00% |  |  |  |  |  |
Master Lease | Subsequent Event |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Annual rent payments under master lease of properties |  |  |  | $ 30,000 |  |  |  |
Cash consideration for acquisition |  |  |  | 400,000 |  |  |  |
Fixed annual rent |  |  |  | $ 27,000 |  |  |  |
Increase in annual rent per year (in percentage) |  |  |  | 2.00% |  |  |  |

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