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Earnings per Share (Schedule of Earnings per Share, Basic and Diluted) (Details) - $ / shares shares in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Weighted Average Number of Shares Outstanding, Basic	66,363	66,970
Effect of dilutive stock options and restricted stock units	522	442
Weighted Average Number of Shares Outstanding, Diluted, Total	66,885	67,412
Earnings Per Share, Basic	$ 0.84	$ 0.00
Earnings Per Share, Diluted	$ 0.84	$ 0

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