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Stock-Based Compensation (Summary Of Restricted Stock Transactions) (Details) - $ / shares
3 Months Ended 9 Months Ended
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Sep. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Equity compensation plan, shares (6,555) (4,736) (57,052) (5,337) (4,874) (192,407)  
Restricted Stock [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Nonvested share units at beginning of period, Number of Share Units     1,068       1,068
Equity compensation plan, shares             (1,170)
Vested, number of shares             1,068
Nonvested share units at end of period, Number of Share Units 1,170           1,170
Nonvested share units at beginning of period, Weighted Average Fair Value     $ 46.83       $ 46.83
Granted, Weighted Average Fair Value             42.75
Share units vested, Weighted Average Fair Value             46.83
Nonvested share units at end of period, Weighted Average Fair Value $ 42.75           $ 42.75