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Significant Accounting Policies - Schedule of Tuition Receivable and Allowance for Credit Losses (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Tuition receivable $ 145,775 $ 110,066
Allowance for credit losses (48,346) (47,113)
Tuition receivable, net 97,429 62,953
Tuition receivable, noncurrent 2,559 2,673
Other Noncurrent Assets    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Tuition receivable, noncurrent $ 2,600 $ 2,700