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Earnings Per Share (Schedule Of Reconciliation Of Basic And Diluted Shares Of Common Stock Outstanding Used In Calculation 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
Earnings Per Share [Abstract]
Weighted average number of shares outstanding - basic	29,817	29,898	29,789	29,824
Effect of dilutive stock awards				1,137
Weighted average number of shares outstanding - diluted	29,817	29,898	29,789	30,961
Basic net income (loss) per share	$ (0.09)	$ (0.02)	$ (0.09)	$ 0.10
Diluted net income (loss) per share	$ (0.09)	$ (0.02)	$ (0.09)	$ 0.10

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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