Per Share Data (Calculation 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]
Number of common share equivalent securities excluded from the diluted earnings per share calculation	1,700	1,700	1,000	1,800
Income from continuing operations attributable to common shareholders	$ 29,844	$ 29,483	$ 607,904	$ 91,009
Amount allocated to participating securities	(40)	(30)	(933)	(122)
Net income attributable to common shareholders – basic	$ 29,804	$ 29,453	$ 606,971	$ 90,887
Total earnings per common share – basic	$ 0.27	$ 0.29	$ 5.66	$ 0.90
Income allocated to common units from continuing operations	$ 0	$ 0	$ 1,056	$ 0
Net income attributable to common shareholders – diluted	$ 29,804	$ 29,453	$ 608,027	$ 90,887
Total earnings per common share – diluted	$ 0.27	$ 0.29	$ 5.62	$ 0.90
Weighted average number of common shares outstanding – basic	108,466	103,071	107,314	101,119
Incremental share awards granted	40	100	52	80
Incremental Common Units	0	0	733	0
Weighted average number of common shares outstanding – diluted	108,506	103,171	108,099	101,199