Fair Value Measurements (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Mar. 31, 2025	Mar. 31, 2025	Jun. 30, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principle balance	$ 558,283	$ 558,283	$ 658,283
Assets measured at fair value using Level 3			0
Liabilities measured at fair value using Level 3			0
Asset impairment charges	6,442	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	404,950
Senior Secured Notes Due 2028 | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	399,700	399,700	389,500
Term B Loan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principle balance	153,333	153,333	253,333
Term B Loan | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	153,700	153,700	254,900
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	6,400
Accounts Receivable | Credit extension program
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	$ 26,400	$ 26,400	$ 28,900
Nonqualified Deferred Compensation Plan | Interest Expense.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment, type extensible enumeration	atge:InvestmentInRabbiTrustMember	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	$ 12,300	$ 12,300	$ 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]
Fair value of credit extension programs	$ 11,900	$ 11,900	$ 13,200