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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 |  |

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