Fair Value Measurements (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principle balance	$ 558,283		$ 658,283
Assets measured at fair value using Level 3			0
Liabilities measured at fair value using Level 3		$ 0	0	$ 5,000
Asset impairment charges	6,442
Senior Secured Notes Due 2028
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principle balance	404,950		404,950
Senior Secured Notes Due 2028 | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	402,800		389,500
Term B Loan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principle balance	153,333		253,333
Term B Loan | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	153,800		254,900
Other Nonoperating Income (Expense) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment impairment		$ 5,000
Student Services And Administrative Expense | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset impairment charges	6,400
Accounts Receivable | Credit extension program | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	27,100		28,900
Nonqualified Deferred Compensation Plan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of credit extension programs	$ 12,800		$ 13,200
Investment, type extensible enumeration	atge:InvestmentInRabbiTrustMember		atge:InvestmentInRabbiTrustMember
Nonqualified Deferred Compensation Plan | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment, type extensible enumeration	atge:InvestmentInRabbiTrustMember		atge:InvestmentInRabbiTrustMember
Nonqualified Deferred Compensation Plan | Accrued Liabilities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation	$ 13,500		$ 12,200
Nonqualified Deferred Compensation Plan | Prepaid Expenses and Other Current Assets | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of credit extension programs	$ 12,800		$ 13,200