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Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Finite Lived And Indefinite Lived Intangible Assets By Major Class [Line Items]        
Useful life - acquired (in years)     3 years  
Amortization expenses $ 3,450,000 $ 3,694,000 $ 6,982,000 $ 7,432,000
Trade names        
Finite Lived And Indefinite Lived Intangible Assets By Major Class [Line Items]        
Impairment of intangible assets $ 0 $ 0 0 0
Student relationships        
Finite Lived And Indefinite Lived Intangible Assets By Major Class [Line Items]        
Amortization expenses     $ 5,400,000 $ 5,800,000