Intangibles - Additional Information (Details)	3 Months Ended
	Mar. 31, 2020 USD ($)	Jan. 31, 2020 property	Dec. 31, 2019 USD ($)	Oct. 31, 2019 property	Jan. 01, 2019 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Intangible assets acquired	$ 273,000,000
Acquired intangible assets acquired, weighted average useful life	6 years
Intangible liabilities acquired	$ 0
Intangible assets, net	(550,348,000)		$ (331,693,000)
Intangible liabilities, net	$ (72,137,000)		$ (74,991,000)
Accounting Standards Update 2016-12
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Intangible assets, net					$ 39,000,000
Intangible liabilities, net					$ 6,000,000
Brookedale MTCA | CCRC JV
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property count | property		15
Other non-reportable segments | CCRC JV | Assets Leased to Others
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property count | property		15		15
Other non-reportable segments | Brookedale MTCA | CCRC JV | Assets Leased to Others
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property count | property		13