Significant Accounting Policies - Schedule of Tuition Receivable and Allowance for Credit Losses (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Accounting Policies [Line Items]
Tuition receivable	$ 123,357	$ 110,066
Allowance for credit losses	(47,255)	(47,113)
Tuition receivable, net	76,102	62,953
Tuition receivable, noncurrent	2,516	2,673
Other assets
Accounting Policies [Line Items]
Tuition receivable, noncurrent	$ 2,500	$ 2,700