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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Earnings Per Share [Abstract]
Weighted average number of shares outstanding - basic	29,876	29,739	29,841	29,939
Effect of dilutive stock awards	1,201	427	1,158	223
Weighted average number of shares outstanding - diluted	31,077	30,166	30,999	30,162
Basic net income (loss) per share	$ 0.12	$ 0.14	$ 0.22	$ 0.13
Diluted net income (loss) per share	$ 0.11	$ 0.14	$ 0.21	$ 0.12