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Stock-Based Compensation (Summary Of Restricted Stock Units) (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Shares [Roll Forward]      
Outstanding, beginning of period (in shares) 1,787,943    
Granted (in shares) 313,697 1,531,702 930,831
Vested (in shares) (1,021,029)    
Forfeited (in shares) (50,487)    
Outstanding, end of period (in shares) 1,030,124 1,787,943  
Weighted-average price grant date fair value      
Outstanding, beginning of period (in dollars per share) $ 7.49    
Granted (in dollars per share) 18.81 $ 6.87 $ 8.57
Vested (in dollars per share) 7.69    
Forfeited (in dollars per share) 9.27    
Outstanding, end of period (in dollars per share) $ 10.49 $ 7.49  
Average remaining contractual term (years) [Abstract]      
Average remaining contractual term (years), Granted 1 year 9 months 7 days    
Average remaining contractual term (years), Outstanding 1 year 2 months 1 day 1 year 6 months