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Stock-Based Compensation - Activity in the Stock Plan (Details) - shares
1 Months Ended 6 Months Ended 162 Months Ended 210 Months Ended
May 31, 2021
May 31, 2014
Jun. 30, 2022
Jun. 30, 2022
Jun. 30, 2022
Employee Stock Award Plan-2008          
Share-based Compensation Arrangement by Share-based Payment Award Available for Grant [Roll Forward]          
Beginning balance (in shares)     1,317,819 1,900,000  
Additional shares authorized (in shares) 650,000 1,500,000 0 2,150,000  
Number of awards granted (in shares)     (132,116) (3,582,872)  
Number of awards forfeited or expired (in shares)     95,379 813,954  
Ending balance (in shares)     1,281,082 1,281,082 1,281,082
Employee Stock Award Plan-2008 | Options Awards          
Share-based Compensation Arrangement by Share-based Payment Award Available for Grant [Roll Forward]          
Number of option awards exercised (in shares)     45,141 1,527,114  
Employee Stock Award Plan-2008 | Unrestricted Stock Awards          
Share-based Compensation Arrangement by Share-based Payment Award Available for Grant [Roll Forward]          
Number of awards granted (in shares)     0 (10,090)  
Employee Stock Award Plan-2008 | Restricted Stock Awards          
Share-based Compensation Arrangement by Share-based Payment Award Available for Grant [Roll Forward]          
Number of restricted stock awards vested (in shares)     32,313 250,174  
Director Plan - 2005          
Share-based Compensation Arrangement by Share-based Payment Award Available for Grant [Roll Forward]          
Beginning balance (in shares)     144,352   300,000
Additional shares authorized (in shares)     0   150,000
Number of awards granted (in shares)     (22,860)   (355,238)
Number of awards forfeited or expired (in shares)     0   26,730
Ending balance (in shares)     121,492 121,492 121,492
Director Plan - 2005 | Options Awards          
Share-based Compensation Arrangement by Share-based Payment Award Available for Grant [Roll Forward]          
Number of option awards exercised (in shares)     8,580   150,581
Director Plan - 2005 | Restricted Stock Awards          
Share-based Compensation Arrangement by Share-based Payment Award Available for Grant [Roll Forward]          
Number of restricted stock awards vested (in shares)     18,510   117,001