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Earnings Per Share ("EPS") (Computation Of Basic And Diluted Earnings Per Share) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Earnings Per Share [Abstract]        
Net income $ 151,169 $ 192,376 $ 485,534 $ 563,468
Preferred dividends 9,320 9,689 27,961 26,267
Net income available to common shareholders $ 141,849 $ 182,687 $ 457,573 $ 537,201
Average shares used in basic computation 108,767 107,379 109,017 107,655
Dilutive effect of stock options and units [1] 8,451 11,096 8,632 10,700
Average shares used in diluted computation 117,218 118,475 117,649 118,355
Basic $ 1.30 $ 1.70 $ 4.20 $ 4.99
Diluted $ 1.21 $ 1.54 $ 3.89 $ 4.54
[1] Diluted earnings per share is computed on the basis of the weighted-average number of shares of common stock plus the effect of dilutive potential common shares outstanding during the period using the treasury stock method. Diluted earnings per share include units.