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		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings Per Share Reconciliation [Line Items]
Net income	$ 18,829	$ 8,065	$ 47,010	$ 23,351
Denominator for basic earnings per share – weighted-average number of common shares outstanding during the period	35,151	35,423	35,184	35,806
Denominator for diluted earnings per share	35,348	35,666	35,604	36,287
Basic earnings per share	$ 0.54	$ 0.23	$ 1.34	$ 0.65
Diluted earnings per share	$ 0.53	$ 0.23	$ 1.32	$ 0.64
Stock Options [Member]
Earnings Per Share Reconciliation [Line Items]
Incremental common shares attributable to exercise of dilutive options	13	32	15	43
Restricted Stock Units [Member]
Earnings Per Share Reconciliation [Line Items]
Incremental common shares attributable to exercise of dilutive options	184	211	405	438