Earnings Per Share (Schedule Of Reconciliation Of Shares Outstanding For Basic And Diluted Earnings Per Share) (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Shares outstanding for basic earnings per share:
Shares outstanding for basic earnings per share (in shares)	85,314	86,198	85,293	86,206
Shares outstanding for diluted earnings per share:
Shares outstanding for basic earnings per share (in shares)	85,314	86,198	85,293	86,206
Dilutive effect of share-based payment awards (in shares)	1,376	1,469	1,342	1,427
Shares outstanding for diluted earnings per share (in shares)	86,690	87,667	86,635	87,633