Net Income Per Common Share and Equity per Common Share (Schedule Of Earnings Per Share) (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net Income Per Common Share and Equity per Commn Share [Abstract]
Average common shares outstanding during the period for basic computation	215,550	177,904	177,612
Dilutive effect of employee stock-based compensation	381	495	563
Average common shares outstanding during the period for diluted computation	215,931	178,399	178,175