Supplemental Disclosure of Cash Flow Information - Cash and Restricted Cash (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 41,341	$ 27,735
Long-term restricted cash	30,356	47,963
Cash and escrow deposits - restricted, total	71,697	75,698
Reconciliation of cash, cash equivalents, and restricted cash:
Cash and cash equivalents	277,971	398,850
Restricted cash	41,341	27,735
Long-term restricted cash	30,356	47,963
Total cash, cash equivalents, and restricted cash	349,668	474,548	$ 438,314	$ 465,148
Interest rate cap escrows
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	17,843	3,797
Reconciliation of cash, cash equivalents, and restricted cash:
Restricted cash	17,843	3,797
Real estate tax and property insurance escrows
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	16,061	15,722
Reconciliation of cash, cash equivalents, and restricted cash:
Restricted cash	16,061	15,722
Replacement reserve escrows
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	7,194	7,999
Reconciliation of cash, cash equivalents, and restricted cash:
Restricted cash	7,194	7,999
Other
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	243	217
Reconciliation of cash, cash equivalents, and restricted cash:
Restricted cash	243	217
Insurance deposits
Restricted Cash and Cash Equivalents Items [Line Items]
Long-term restricted cash	15,961	18,230
Reconciliation of cash, cash equivalents, and restricted cash:
Long-term restricted cash	15,961	18,230
CCRCs escrows
Restricted Cash and Cash Equivalents Items [Line Items]
Long-term restricted cash	10,813	15,847
Reconciliation of cash, cash equivalents, and restricted cash:
Long-term restricted cash	10,813	15,847
Debt service reserve
Restricted Cash and Cash Equivalents Items [Line Items]
Long-term restricted cash	3,472	13,779
Reconciliation of cash, cash equivalents, and restricted cash:
Long-term restricted cash	3,472	13,779
Letters of credit collateral
Restricted Cash and Cash Equivalents Items [Line Items]
Long-term restricted cash	110	107
Reconciliation of cash, cash equivalents, and restricted cash:
Long-term restricted cash	$ 110	$ 107