Earnings Per Share (Schedule Of Calculation Of Basic And Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share Reconciliation [Line Items]
Net Income (Loss)	$ 13,991	$ 17,221	$ 26,351	$ 28,181
Denominator for basic earnings per share – weighted-average number of common shares outstanding during the period	35,618	35,157	35,478	35,201
Denominator for diluted earnings per share	35,676	35,336	35,730	35,616
Basic earnings per share	$ 0.39	$ 0.49	$ 0.74	$ 0.8
Diluted earnings per share	$ 0.39	$ 0.49	$ 0.74	$ 0.79
Employee Stock Option
Earnings Per Share Reconciliation [Line Items]
Incremental common shares attributable to exercise of dilutive options	0	9	4	21
Restricted Stock Units [Member]
Earnings Per Share Reconciliation [Line Items]
Incremental common shares attributable to exercise of dilutive options	58	170	248	394