Earnings Per Common Share (Computation Of Basic And Diluted Earnings Per Common Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended							9 Months Ended
		Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share [Abstract]
Net income		$ 135,845	$ 133,377	$ (14,038)	$ 82,964	$ 84,040	$ 78,591	$ 91,157	$ 255,184	$ 253,788
Weighted average number of common shares outstanding - basic (in shares)	[1]	208,070				129,319			190,997	129,262
Effect of potentially dilutive common shares (in shares)		575				414			549	440
Weighted average number of shares outstanding, diluted (in shares)	[1]	208,645				129,733			191,546	129,702
Earnings per common share:
Basic (in dollars per share)	[1]	$ 0.65				$ 0.65			$ 1.34	$ 1.96
Diluted (in dollars per share)	[1]	$ 0.65				$ 0.65			$ 1.33	$ 1.96

[1] Periods prior to February 28, 2023 have been restated as a result of the adjustment to common shares outstanding based on the exchange ratio from the Merger of 0.5958.