Earnings Per Share (Basic and Diluted Earnings Per Share (in shares)) (Details) - shares	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Earnings Per Share [Abstract]
Weighted-average shares for basic EPS	146,633,036	146,362,270	145,987,002
Plus incremental shares related to convertible debt	718,918	0	0
Plus incremental shares related to stock options and non-vested restricted stock	16,509	122,542	284,817
Weighted-average shares for diluted EPS	147,368,463	146,484,812	146,271,819

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of convertible debt securities using the if-converted 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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- Definition

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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