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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

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