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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2019 | Jun. 30, 2018 | Mar. 31, 2018 | Mar. 31, 2019 | Mar. 31, 2018
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Net balance of capitalized software development costs | $ 11,200 | $ 13,500 | $ 3,400 | $ 11,200 | $ 3,400
Anti-dilutive shares excluded from computations of earnings per share | 194,000 |  | 294,000 | 223,000 | 1,273,000
Cumulative translation losses | $ 148,800 | 142,600 | $ 59,500 | $ 148,800 | $ 59,500
Advertising expense | 21,700 |  | 22,100 | 61,900 | 59,500
Impairment of Long-Lived Assets Held-for-use |  |  |  | 2,000 |
Cost of Goods and Services Sold, Total | 156,339 |  | 159,312 | 463,224 | 489,931
Loss from Catastrophes |  |  | 11,100 | 12,500 | 55,100
Deferred Revenue, Revenue Recognized |  |  |  | 100,500 |
Allowance for Doubtful Accounts Receivable, Current | 20,000 | 27,600 | 28,400 | 20,000 | 28,400
Asset Impairment Charges |  |  |  | 39,100 |
Cumulative Effect on Retained Earnings, Net of Tax |  |  |  | 0 | (236)
Proceeds from Insurance Settlement, Operating Activities |  |  |  |  | 20,800
Gain on Business Interruption Insurance Recovery | 0 |  | 0 | 15,571 | 0
Accounting Standards Update 2016-01 [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Cumulative Effect on Retained Earnings, Net of Tax |  |  |  | 400 |
Noncontrolling Interest |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Cumulative translation losses | $ 3,400 | 3,000 | 1,300 | 3,400 | 1,300
Hurricane Expense [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Impairment of Long-Lived Assets Held-for-use |  |  |  |  | 29,900
Cost of Goods and Services Sold, Total |  |  |  |  | 13,400
Asset Impairment [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Unusual or Infrequent Item, or Both, Insurance Proceeds |  |  |  | $ 12,500 | 20,800
Minimum |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Equity Method Investment, Ownership Percentage | 20.00% |  |  | 20.00% |
Maximum |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Equity Method Investment, Ownership Percentage | 50.00% |  |  | 50.00% |
Adtalem Brazil |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Ownership interest of parent in subsidiary | 97.90% |  |  | 97.90% |
Adtalem Global Education Inc. |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Cumulative translation losses | $ 145,400 | 139,600 | 58,200 | $ 145,400 | 58,200
Tax effect on unrealized gains on available-for-sale securities |  | 400 | 300 |  | 300
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax |  | $ 100 | $ 200 |  | $ 200
Edupristine |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Ownership interest of parent in subsidiary | 69.00% |  |  | 69.00% |
Kaizen |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Ownership interest of parent in subsidiary | 31.00% |  |  | 31.00% |
Adtalem Brazil Senior Management Group |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Ownership interest of parent in subsidiary | 2.10% |  |  | 2.10% |

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