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Share-based Compensation - Employee Stock Purchase Plan (Details) - shares
shares in Thousands
6 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Apr. 01, 2003
Stock-based Compensation      
Shares authorized for issuance (in shares) 6,500    
Employee Stock Purchase Plan      
Stock-based Compensation      
Purchase price of stock as percent of market fair value (in percent) 85.00%    
Compensation authorized by the employee to be withheld for stock purchase (in percent) 10.00%    
Shares authorized for issuance (in shares)     1,100
Shares issued (in shares) 56 52  
Cumulative shares issued (in shares) 966