Quarterly report pursuant to Section 13 or 15(d)

Revenue - Revenue by Major Revenue Stream (Details)

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Revenue - Revenue by Major Revenue Stream (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Disaggregation of Revenue [Line Items]        
Total revenue $ 667,761 $ 561,731 $ 1,264,478 $ 1,072,582
Total center revenue        
Disaggregation of Revenue [Line Items]        
Total revenue 645,007 542,125 1,225,492 1,039,877
Membership dues and enrollment fees        
Disaggregation of Revenue [Line Items]        
Total revenue 462,696 387,115 888,107 744,603
In-center revenue        
Disaggregation of Revenue [Line Items]        
Total revenue 182,311 155,010 337,385 295,274
Other revenue        
Disaggregation of Revenue [Line Items]        
Total revenue $ 22,754 $ 19,606 $ 38,986 $ 32,705