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Supplemental Balance Sheet and Cash Flow Information (Tables)
 12 Months Ended
Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Prepaid Expenses
Prepaid expenses and other current assets consisted of the following:
December 31,
20232022
Property held for sale
$8,600 $4,987 
Construction contract receivables
25,280 8,867 
Prepaid software licenses and maintenance5,481 10,009 
Other
18,390 21,880 
Prepaid expenses and other current assets
$57,751 $45,743 
Accrued Expenses
Accrued expenses and other current liabilities consisted of the following:
December 31,
20232022
Real estate taxes
$32,165 $32,373 
Accrued interest
38,723 36,518 
Payroll liabilities
40,357 19,908 
Self-insurance accruals
24,869 21,369 
Corporate accruals
33,066 29,731 
Other
16,125 14,528 
Accrued expenses and other current liabilities
$185,305 $154,427 
Other Current Liabilities
Accrued expenses and other current liabilities consisted of the following:
December 31,
20232022
Real estate taxes
$32,165 $32,373 
Accrued interest
38,723 36,518 
Payroll liabilities
40,357 19,908 
Self-insurance accruals
24,869 21,369 
Corporate accruals
33,066 29,731 
Other
16,125 14,528 
Accrued expenses and other current liabilities
$185,305 $154,427 
Supplemental Cash Flow Information
(Increases) decreases in operating assets and increases (decreases) in operating liabilities are as follows:
Year Ended December 31,
202320222021
Accounts receivable$(12,857)$(5,988)$(1,736)
Center operating supplies and inventories(7,131)(4,699)(4,729)
Prepaid expenses and other current assets7,967 2,027 (8,050)
Income tax receivable(9,352)2,784 660 
Other assets5,160 796 2,363 
Accounts payable7,145 2,990 17,189 
Accrued expenses and other current liabilities8,334 6,573 38,299 
Deferred revenue10,977 3,028 (10,950)
Other liabilities(3,778)(4,139)(6,329)
Changes in operating assets and liabilities$6,465 $3,372 $26,717 
Additional supplemental cash flow information is as follows:
Year Ended December 31,
202320222021
Net cash paid for (received from) income taxes, net of refunds received (taxes paid)
$14,051 $10,640 $(885)
Cash payments for interest, net of capitalized interest
122,154 105,152 125,411 
Capitalized interest
18,692 15,872 3,749 
Non-cash activities:
Issuance of Series A Preferred Stock (as defined in Note 10, Stockholders’ Equity) in connection with the extinguishment of a related party secured loan— — 108,591 
Conversion of Series A Preferred Stock to common stock— — 149,585 
Issuances of common stock in connection with a business acquisition1,472 — — 
Acquisition of property and equipment through the assumption of a mortgage10,600 — —