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INVESTMENTS IN AND ADVANCES TO UNCONSOLIDATED AFFILIATES - Schedule of Share of Income (Loss) From Unconsolidated Affiliates (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Schedule Of Equity Method Investments [Line Items]
Loss from unconsolidated affiliates	$ (74,999)	$ (46,838)
MGP BREIT Venture (through April 29, 2022)
Schedule Of Equity Method Investments [Line Items]
Loss from unconsolidated affiliates	0	38,936
BetMGM
Schedule Of Equity Method Investments [Line Items]
Loss from unconsolidated affiliates	(81,872)	(91,993)
Other
Schedule Of Equity Method Investments [Line Items]
Loss from unconsolidated affiliates	$ 6,873	$ 6,219

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- Definition

This item represents the entity's proportionate share for the period of the operating income (loss) of its investees (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied, excluding pre-opening expenses. Such amount typically reflects adjustments to eliminate intercompany gains and losses, and to amortize, if appropriate, any difference between cost and underlying equity in net assets of the investee at the date of investment.

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- Definition

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