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		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Earnings Per Share [Abstract]
Net income		$ 165,294	$ 134,352	$ 328,869	$ 291,891
Preferred dividends		9,321	9,320	18,641	18,640
Net income available to common shareholders		$ 155,973	$ 125,032	$ 310,228	$ 273,251
Average shares used in basic computation		104,150	107,944	104,217	108,360
Dilutive effect of stock options and units	[1]	6,135	5,920	5,939	6,298
Average shares used in diluted computation		110,285	113,864	110,156	114,658
Basic		$ 1.5	$ 1.16	$ 2.98	$ 2.52
Diluted		$ 1.41	$ 1.1	$ 2.82	$ 2.38

[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.