Annual report pursuant to Section 13 and 15(d)

Leases - Lease Costs (Details)

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Leases - Lease Costs (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Lease cost:      
Operating lease cost $ 261,144 $ 237,499 $ 204,165
Short-term lease cost 4,105 2,113 1,049
Finance lease cost:      
Amortization of right-of-use assets 1,024 1,372 1,493
Interest on lease liabilities 98 99 177
Interest on financing obligations 2,401 0 0
Total lease cost 344,652 307,049 268,209
Rent      
Lease cost:      
Variable lease cost 9,873 5,614 4,609
Center operations      
Lease cost:      
Variable lease cost $ 66,007 $ 60,352 $ 56,716