Intangible Assets, net - Additional Information (Detail) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018 a	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Land
Schedule Of Finite And Indefinite Lived Intangible Assets
Ground lease payments, 2019		$ 3,800
Ground lease payments, 2020		3,800
Ground lease payments, 2021		3,800
Ground lease payments, 2022		3,800
Ground lease payments, 2023		3,800
Ground lease payments, thereafter		$ 370,700
Land
Schedule Of Finite And Indefinite Lived Intangible Assets
Area of land acquired | a	38
Assets Leased to Others
Schedule Of Finite And Indefinite Lived Intangible Assets
Area of land acquired | a	16
Macau Gaming Concession
Schedule Of Finite And Indefinite Lived Intangible Assets
Intangible assets, useful life, years		20 years
Future amortization expense, 2019		$ 2,400
Future amortization expense, 2020		2,400
Future amortization expense, 2021		2,400
Future amortization expense, 2022		1,200
Finite-lived intangible assets, gross		$ 42,300	$ 42,300
Massachusetts Gaming License
Schedule Of Finite And Indefinite Lived Intangible Assets
Intangible assets, useful life, years		15 years
Finite-lived intangible assets, gross		$ 117,700	105,200
Undeveloped Land - Las Vegas
Schedule Of Finite And Indefinite Lived Intangible Assets
Finite-lived intangible assets, gross		89,101	$ 0
Expected amortization of associated intangible assets, each year 2019-2096		1,100
Expected amortization of associated intangible assets, 2097		$ 700