Revenue - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Monthly resident fees	$ 34.7		$ 34.7		$ 38.9
Revenue recognized			55.2	$ 72.7
Facility expense, allowance for credit loss	3.6	$ 3.6	7.6	$ 7.1
Deferred Revenue and Credits
Disaggregation of Revenue [Line Items]
Contract with customer, liability	154.7		154.7		$ 72.5
CARES Act | Accelerated and Advance Payment Program
Disaggregation of Revenue [Line Items]
Amount received from Accelerated and Advance Payment Program	$ 85.0		$ 85.0