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		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Weighted average number of shares outstanding - basic	29,983	29,876	29,854	29,841
Effect of dilutive stock awards	1,003	1,201		1,158
Weighted average number of shares outstanding - diluted	30,986	31,077	29,854	30,999
Basic net income (loss) per share	$ 0.04	$ 0.12	$ (0.05)	$ 0.22
Diluted net income (loss) per share	$ 0.04	$ 0.11	$ (0.05)	$ 0.21