Accounting Policies and Related Matters - Additional Information (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 properties
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Spot occupancy properties | properties			543
Number of disposals | properties			4
Seniors Housing Operating
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Spot occupancy	77.50%	73.00%
COVID-19 | Seniors Housing Operating
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase in operational cost | $	$ 11,003	$ 27,976
Cost of property operating expense | $	$ 5,760	$ 49,180