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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