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Share-based Compensation - Stock Purchase Plan (Details) - shares
shares in Thousands
1 Months Ended 6 Months Ended
Jan. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Apr. 01, 2003
Stock-based Compensation        
Shares authorized for issuance (in shares)   8,000    
Employee Stock Purchase Plan        
Stock-based Compensation        
Shares authorized for issuance (in shares)       1,100
Additional shares for future issuances 1,500      
Shares issued (in shares)   107 56  
Cumulative shares issued (in shares)   1,100    
Purchase price of stock based on market (as a percent)   85.00%    
Maximum compensation withheld for stock purchase (as a percent)   10.00%