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, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Earnings Per Share [Abstract]
Net income		$ 158,505	$ 68,161	$ 487,374	$ 360,052
Preferred dividends		9,320	9,321	27,961	27,961
Net income available to common shareholders		$ 149,185	$ 58,840	$ 459,413	$ 332,091
Average shares used in basic computation		103,966	106,068	104,135	107,580
Dilutive effect of stock options and units	[1]	7,028	7,127	6,322	6,590
Average shares used in diluted computation		110,994	113,195	110,457	114,170
Basic		$ 1.43	$ 0.55	$ 4.41	$ 3.09
Diluted		$ 1.34	$ 0.52	$ 4.16	$ 2.91

[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.