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Net Income Per Common Share (Ant-Dilutive Schedule) (Details) - Stock Options - $ / shares
shares in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Average outstanding options 1,633 373 1,540 337
Minimum        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Range of exercise prices $ 49.20 $ 79.01 $ 49.20 $ 70.18
Maximum        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Range of exercise prices $ 95.25 $ 95.25 $ 95.25 $ 95.25