Earnings Per Share ("EPS") (Computation Of Basic And Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Earnings Per Share [Abstract]
Net income		$ 731,379	$ 522,536	$ 662,155
Preferred dividends		37,281	37,281	37,281
Net income available to common shareholders		$ 694,098	$ 485,255	$ 624,874
Average shares used in basic computation		104,066	106,661	108,848
Dilutive effect of stock options and units	[1]	6,909	6,792	8,692
Average shares used in diluted computation		110,975	113,453	117,540
Basic		$ 6.67	$ 4.55	$ 5.74
Diluted		$ 6.25	$ 4.28	$ 5.32

[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.