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Acquisitions (Additional Information) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
May 31, 2019
Dec. 31, 2019
Jun. 30, 2019
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Business Acquisition [Line Items]            
Payments to acquire business       $ 0 $ 0 $ 118,409
Cash paid for acquisition     $ 118,400      
Proceeds from net working capital   $ 100        
OnCourse Learning [Member]            
Business Acquisition [Line Items]            
Percentage of voting interests acquired 100.00%          
Payments to acquire business $ 118,300          
Cash acquired from acquisition 1,200          
Long-term line of credit 100,000          
Intangible assets $ 63,100          
Amortizable intangible assets, estimated useful lives 9 years          
OnCourse Learning [Member] | Trade Name [Member]            
Business Acquisition [Line Items]            
Intangible assets, indefinite lived $ 18,400