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Stock-Based Payments (Restricted Stock Activity) (Details) - $ / shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]    
Number of shares outstanding at December 31 (shares) 1,264,287  
Number of shares granted 499,632  
Number of shares vested (335,411)  
Number of shares cancelled (313,453)  
Number of shares outstanding at December 31 (shares) 1,115,055  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Weighted average grant date fair value outstanding $ 205 $ 190
Weighted average grant date fair value granted 202  
Weighted average grant date fair value vested 167  
Weighted average grant date fair value cancelled $ 180