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Fair Value Measurements (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Long-term debt, gross | $ 708,283 | $ 658,283 |
Assets measured at fair value using Level 3 | 0 | 0 |
Liabilities measured at fair value using Level 3 | 0 | 0 | $ 5,000
Senior Secured Notes Due 2028 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Long-term debt, gross | 404,950 | 404,950 |
Senior Secured Notes Due 2028 | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Long-term debt, fair value |  | 389,500 |
Term B Loan |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Long-term debt, gross | 303,333 | 253,333 |
Term B Loan | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Long-term debt, fair value |  | 254,900 |
Other income, net |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Investment impairment | 5,000 |  |
Accounts Receivable | Credit extension program |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Loans Receivable, Fair Value Disclosure | 29,700 | 28,900 |
Nonqualified Deferred Compensation Plan |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Deferred Compensation Plan Assets, Fair Value Disclosure | $ 12,500 | $ 13,200 |
Investment, type extensible enumeration | atge:InvestmentInRabbiTrustMember | atge:InvestmentInRabbiTrustMember |
Nonqualified Deferred Compensation Plan | Accrued Liabilities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Deferred Compensation Liability, Current, Fair Value Disclosure | $ 12,600 | $ 12,200 |
Nonqualified Deferred Compensation Plan | Prepaid Expenses and Other Current Assets |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Deferred Compensation Plan Assets, Fair Value Disclosure | $ 12,500 | $ 13,200 |

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