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Stock-Based Compensation (Summary Of Restricted Stock Units) (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares
3 Months Ended 12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Shares [Roll Forward]      
Outstanding, beginning of period (in shares) 1,030,124    
Granted (in shares) 219,311 313,697  
Vested (in shares) (284,040)    
Forfeited (in shares) (23,220)    
Outstanding, end of period (in shares) 942,175   1,030,124
Weighted-average grant date fair value      
Outstanding, beginning of period (in dollars per share) $ 10.49    
Granted (in dollars per share) 30.32 $ 18.81  
Vested (in dollars per share) 13.51    
Forfeited (in dollars per share) 13.29    
Outstanding, end of period (in dollars per share) $ 14.25   $ 10.49
Average remaining contractual term (years), Outstanding 1 year 6 months   1 year 2 months 1 day
Average remaining contractual term (years), Granted 2 years 10 months 9 days