Segment Reporting - Summary of Geographic Information (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	$ 1,473,844		$ 1,239,797	$ 4,342,084	$ 3,432,851
Total assets	37,414,488			37,414,488		$ 34,910,325	[1]
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	1,276,927		990,034	3,799,621	2,709,354
Total assets	31,604,241			31,604,241		28,595,703
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	95,914		146,308	246,226	405,938
Total assets	3,195,747			3,195,747		3,938,258
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	101,003		$ 103,455	296,237	$ 317,559
Total assets	$ 2,614,500			$ 2,614,500		$ 2,376,364
Revenue | Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage	100.00%		100.00%	100.00%	100.00%
Revenue | United States | Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage	86.60%		79.90%	87.50%	78.90%
Revenue | United Kingdom | Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage	6.50%		11.80%	5.70%	11.80%
Revenue | Canada | Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage	6.90%		8.30%	6.80%	9.30%
Assets | Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage		100.00%		100.00%
Assets | United States | Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage		81.90%		84.50%
Assets | United Kingdom | Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage		11.30%		8.50%
Assets | Canada | Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage		6.80%		7.00%
Resident fees and services | Revenue | United States | Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage	80.00%			79.00%
Resident fees and services | Revenue | United Kingdom | Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage	9.00%			10.00%
Resident fees and services | Revenue | Canada | Geographic Concentration Risk
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage	11.00%			11.00%

[1] The consolidated balance sheet at December 31, 2021 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements.