Intangibles - Additional Information (Details)	6 Months Ended
	Jun. 30, 2020 USD ($)	Jan. 31, 2020 property	Jan. 31, 2020 facility	Dec. 31, 2019 USD ($)	Oct. 31, 2019 property	Jan. 01, 2019 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Intangible assets acquired	$ 295,000,000
Intangible liabilities acquired	$ 42,000,000
Acquired intangible assets acquired, weighted average useful life	7 years
Acquired intangible liabilities acquired , weighted average useful life	10 years
Intangible assets, net	$ 537,555,000			$ 331,693,000
Intangible liabilities, net	$ 110,732,000			$ 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 | CCRC JV | Assets Leased to Others
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property count		15	15		15
Other Non-reportable | Brookedale MTCA | CCRC JV | Assets Leased to Others
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property count		13	13