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
Mar. 31, 2024
Mar. 31, 2023
Disaggregation of Revenue [Line Items]    
Total revenue $ 596,717 $ 510,851
Total center revenue    
Disaggregation of Revenue [Line Items]    
Total revenue 580,485 497,752
Membership dues and enrollment fees    
Disaggregation of Revenue [Line Items]    
Total revenue 425,411 357,488
In-center revenue    
Disaggregation of Revenue [Line Items]    
Total revenue 155,074 140,264
Other revenue    
Disaggregation of Revenue [Line Items]    
Total revenue $ 16,232 $ 13,099