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Equity Incentive Plans (Summary Of Exercisable Options) (Details) - USD ($)
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Options outstanding 56,981    
Weighted avg. life remaining 2 years    
Weighted avg. exercise price $ 62.41    
Aggregate intrinsic value $ 0    
Intrinsic value of stock options exercised $ 0 $ 0 $ 62,000
44.44-49.99 [Member]      
Options outstanding 1,380    
Weighted avg. life remaining 6 years 1 month 6 days    
60.00 - 69.99 [Member]      
Options outstanding 47,610    
Weighted avg. life remaining 1 year 7 months 6 days    
70.00 - 76.63 [Member]      
Options outstanding 4,156    
Weighted avg. life remaining 3 years