Per Share Data (Calculation Of Basic And Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Earnings Per Share [Abstract]
Number of common share equivalent securities excluded from the diluted earnings per share calculation	1,800	1,800	1,000
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	$ 384,462	$ 163,293	$ 403,309
Amount allocated to participating securities	(824)	(295)	(646)
Net Income (Loss) Available to Common Stockholders, Basic	$ 383,638	$ 162,998	$ 402,663
Total earnings per common share - basic	$ 3.54	$ 1.50	$ 3.71
Weighted average number of common shares outstanding – basic	108,376	108,491	108,653
Income allocated to common units from continuing operations	$ 0	$ 0	$ 2,086
Net income attributable to common shareholders - diluted	$ 383,638	$ 162,998	$ 404,749
Total earnings per common share - diluted	$ 3.54	$ 1.50	$ 3.70
Common share options and share awards granted	58	48	21
Common units	0	0	725
Weighted average number of common shares outstanding - diluted	108,434	108,539	109,399