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Accounts Payable, Accrued Liabilities, and Other Liabilities
9 Months Ended
Sep. 30, 2021
Payables and Accruals [Abstract]  
Accounts Payable, Accrued Liabilities, and Other Liabilities Accounts Payable, Accrued Liabilities, and Other Liabilities
The following table summarizes the Company’s accounts payable, accrued liabilities, and other liabilities, excluding accounts payable, accrued liabilities, and other liabilities related to assets classified as discontinued operations (in thousands):
 September 30,
2021
December 31,
2020
Refundable entrance fees(1)
$296,278 $317,444 
Accrued construction costs150,204 95,293 
Accrued interest31,313 78,735 
Other accounts payable and accrued liabilities252,144 269,145 
Accounts payable, accrued liabilities, and other liabilities$729,939 $760,617 
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(1)At September 30, 2021 and December 31, 2020, unamortized nonrefundable entrance fee liabilities were $491 million and $484 million, respectively, which are recorded within deferred revenue on the Consolidated Balance Sheets.