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Summary of Significant Accounting Policies (Additional Information) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 | Dec. 31, 2018 | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2018 | Jul. 01, 2019
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Revenue practical expedient remaining performance obligation applied |  |  | true |  |  |
Capitalized internal-use software development costs | $ 10,600 |  | $ 12,300 | $ 10,600 |  |
Horizon Term |  |  | 5 years |  |  |
Property, Plant and Equipment, Gross | 606,673 |  | $ 617,122 | 606,673 |  |
Settlement gain |  |  | $ 0 | 26,178 | $ 0 |
Discount on re-issue of treasury stock |  |  | 10.00% |  |  |
Employee Stock Purchase Plan, Percent Of Base Earnings |  |  | 10.00% |  |  |
Advertising expense |  |  | $ 82,600 | 72,000 | 64,900 |
Gain on Business Interruption Insurance Recovery |  |  | 0 | 15,571 | 0 |
Gain on lawsuit settlement | 10,600 |  |  |  |  |
Gain on Business Interruption Insurance Recovery |  |  | 0 | 15,571 | 0 |
Operating lease assets | $ 0 |  | 174,935 | 0 |  |
American University Of The Caribbean And Ross University [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Gain on Business Interruption Insurance Recovery |  | $ 15,600 |  |  |  |
Gain on Business Interruption Insurance Recovery |  | $ 15,600 |  |  |  |
Hurricane [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Impairment of Long-Lived Assets Held-for-use |  |  | 0 | 0 | 31,000 |
Insurance settlements receivable |  |  |  |  | 21,900 |
Hurricane expense |  |  | $ 0 | 0 | 13,400 |
Loss from catastrophes |  |  |  | 12,500 | 63,300 |
Unusual or Infrequent Item, or Both, Insurance Proceeds |  |  |  | 12,500 | 59,000 |
Gain on Business Interruption Insurance Recovery |  |  |  | 15,600 |  |
Gain on Business Interruption Insurance Recovery |  |  |  | $ 15,600 |  |
Hurricane [Member] | American University Of The Caribbean And Ross University [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Impairment of Long-Lived Assets Held-for-use |  |  |  |  | 31,000 |
Insurance settlements receivable |  |  |  |  | 21,900 |
Singularity University [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Cost method investments |  |  |  |  | $ 5,000 |
Cost method investments, interest percentage |  |  |  |  | 3.68% |
ASC 842 |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Operating lease assets |  |  |  |  |  | $ 282,978
Minimum |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Equity method investment, ownership percentage |  |  | 20.00% |  |  |
Finite live intangible assets amortization period |  |  | 5 years |  |  |
Maximum |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Equity method investment, ownership percentage |  |  | 50.00% |  |  |
Finite live intangible assets amortization period |  |  | 10 years |  |  |
Software and Software Development Costs [Member] | Maximum |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Finite live intangible assets amortization period |  |  | 7 years |  |  |
Building and Building Improvements [Member] | Minimum |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Useful life of assets |  |  | 5 years |  |  |
Building and Building Improvements [Member] | Maximum |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Useful life of assets |  |  | 40 years |  |  |
Furniture and Fixtures [Member] | Minimum |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Useful life of assets |  |  | 3 years |  |  |
Furniture and Fixtures [Member] | Maximum |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Useful life of assets |  |  | 8 years |  |  |

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