Supplemental Disclosure of Cash Flow Information - Cash and Restricted Cash (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 27,735	$ 26,845
Long-term restricted cash	47,963	64,438
Total	75,698	91,283
Reconciliation of cash, cash equivalents, and restricted cash:
Cash and cash equivalents	398,850	347,031
Restricted cash	27,735	26,845
Long-term restricted cash	47,963	64,438
Total cash, cash equivalents, and restricted cash	474,548	438,314	$ 465,148	$ 301,697
Real estate tax and property insurance escrows
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	15,722	16,272
Reconciliation of cash, cash equivalents, and restricted cash:
Restricted cash	15,722	16,272
Replacement reserve escrows
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	7,999	9,756
Reconciliation of cash, cash equivalents, and restricted cash:
Restricted cash	7,999	9,756
Interest rate cap escrows
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	3,797	585
Reconciliation of cash, cash equivalents, and restricted cash:
Restricted cash	3,797	585
Other
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	217	232
Reconciliation of cash, cash equivalents, and restricted cash:
Restricted cash	217	232
Insurance deposits
Restricted Cash and Cash Equivalents Items [Line Items]
Long-term restricted cash	18,230	30,932
Reconciliation of cash, cash equivalents, and restricted cash:
Long-term restricted cash	18,230	30,932
CCRCs escrows
Restricted Cash and Cash Equivalents Items [Line Items]
Long-term restricted cash	15,847	15,346
Reconciliation of cash, cash equivalents, and restricted cash:
Long-term restricted cash	15,847	15,346
Debt service reserve
Restricted Cash and Cash Equivalents Items [Line Items]
Long-term restricted cash	13,779	18,053
Reconciliation of cash, cash equivalents, and restricted cash:
Long-term restricted cash	13,779	18,053
Letters of credit collateral
Restricted Cash and Cash Equivalents Items [Line Items]
Long-term restricted cash	107	107
Reconciliation of cash, cash equivalents, and restricted cash:
Long-term restricted cash	$ 107	$ 107