Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Finite Lived And Indefinite Lived Intangible Assets By Major Class [Line Items]
Useful life - acquired	3 years
Amortization expenses	$ 11,457,000	$ 14,350,000	$ 51,495,000
Trade names
Finite Lived And Indefinite Lived Intangible Assets By Major Class [Line Items]
Impairment of intangible assets	0	0	0
Student relationships
Finite Lived And Indefinite Lived Intangible Assets By Major Class [Line Items]
Amortization expenses	$ 8,900,000	$ 11,100,000	$ 44,300,000