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Significant Accounting Policies Share-Based Compensation (Details)
12 Months Ended
Dec. 31, 2021
Stock Options [Member]  
Share-based Compensation Arrangements by Share-based Payment Award [Line Items]  
Vesting period (in years) 7 years
Restricted Stock [Member]  
Share-based Compensation Arrangements by Share-based Payment Award [Line Items]  
Vesting period (in years) 3 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Required Holding Period 2 years