Net Income Per Common Share (Schedule Of Earnings Per Share) (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Net Income Per Common Share [Abstract]
Average common shares outstanding during the period for basic computation	266,767	262,213	265,135	262,089
Effect of dilutive securities:
Employee stock-based compensation	409	541	553	552
Average common shares outstanding during the period for diluted computation	267,176	262,754	265,688	262,641