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REGULATORY SETTLEMENTS - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016
Regulatory Settlement Charge |  | $ 52,200 |  | $ 52,200
Inquiry Settlement | $ 2,250 |  | $ 2,250 |
Inquiry Settlement Penalties | 500 |  | 500 |
Inquiry Settlement Charge | 2,750 |  | 2,750 |
Letter of Credit [Member] |  |  |  |
Letter Of Credit Title IV Disbursement, Amount | 68,400 |  | 68,400 |
Permanent Injunction And Monetary Judgment Agreement [Member] |  |  |  |
Settlement Payment | 49,400 |  | 49,400 |
Forgivable Of Loan | 30,400 |  | 30,400 |
Forgivable Of Account Receivable | 20,200 |  | 20,200 |
Regulatory Settlement Charge | 56,300 |  | 56,300 |
Loan Write Offs | 4,100 |  | 4,100 |
Home Office And Other [Member] |  |  |  |
Regulatory Settlement Charge | 52,200 |  | 52,200 |
Discontinued Operations [Member] |  |  |  |
Regulatory Settlement Charge | $ 4,100 |  | $ 4,100 |

X
- Definition This element represents the amount of loan forgiven. + References No definition available. + Details
Name: | atge_ForgivableOfLoan
Namespace Prefix: | atge_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition This element represent the amount of account receivable forgivable during the period. + References No definition available. + Details
Name: | atge_ForgiveableOfAccountReceivable
Namespace Prefix: | atge_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of settlement awarded to (against) the entity in respect of inquiry. + References No definition available. + Details
Name: | atge_InquirySettlement
Namespace Prefix: | atge_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition These lines are represents inquiry settlement charge. + References No definition available. + Details
Name: | atge_InquirySettlementCharge
Namespace Prefix: | atge_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amounts of inquiry settlement penalties. + References No definition available. + Details
Name: | atge_InquirySettlementPenalties
Namespace Prefix: | atge_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Its represent the amount of letter of credit disbursements. + References No definition available. + Details
Name: | atge_LetterOfCreditTitleIvDisbursementAmount
Namespace Prefix: | atge_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of loans write offs. + References No definition available. + Details
Name: | atge_LoanWriteOffs
Namespace Prefix: | atge_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition This element represents the amount of regulatory settlement charge during the period. + References No definition available. + Details
Name: | atge_RegulatorySettlementCharge
Namespace Prefix: | atge_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of cash settlement made during the period. + References No definition available. + Details
Name: | atge_SettlementPayment
Namespace Prefix: | atge_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_ShortTermDebtTypeAxis=us-gaap_LetterOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_OtherCommitmentsAxis=atge_PermanentInjunctionAndMonetaryJudgmentAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=atge_HomeOfficeAndOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=us-gaap_SegmentDiscontinuedOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |