Net Income Per Common Share (Schedule Of Earnings Per Share) (Details) - shares shares in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Net Income Per Common Share [Abstract]
Average common shares outstanding during the period for basic computation	254,167	219,055	245,144	198,747
Effect of dilutive securities:
Issuance of common stock from private placement			8,926
Tangible equity units		423		212
Employee stock-based compensation	267	312	382	344
Average common shares outstanding during the period for diluted computation	254,434	219,790	254,452	199,303

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Additional shared included in the calculation of diluted EPS as a result of the potentially dilutive effect of equity forward arrangements using the reverse treasury stock method.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of equity unit purchase agreements using the treasury stock method.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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