Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Finite Lived And Indefinite Lived Intangible Assets By Major Class [Line Items]
Useful life - acquired (in years)	3 years
Amortization expenses	$ 3,532,000	$ 3,738,000
Trade names
Finite Lived And Indefinite Lived Intangible Assets By Major Class [Line Items]
Impairment of intangible assets	0	0
Student relationships
Finite Lived And Indefinite Lived Intangible Assets By Major Class [Line Items]
Amortization expenses	$ 2,700,000	$ 2,900,000