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, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Shares outstanding for basic earnings per share:
Shares outstanding for basic earnings per share (in shares)	85,123	85,314	85,325	85,293
Shares outstanding for diluted earnings per share:
Shares outstanding for basic earnings per share (in shares)	85,123	85,314	85,325	85,293
Dilutive effect of share-based payment awards (in shares)	1,388	1,376	1,387	1,342
Shares outstanding for diluted earnings per share (in shares)	86,511	86,690	86,712	86,635