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
	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share Reconciliation [Line Items]
Net income	$ 12,360	$ 10,960
Denominator for basic earnings per share – weighted-average number of common shares outstanding during the period	35,336	35,245
Denominator for diluted earnings per share	35,592	35,470
Basic earnings per share	$ 0.35	$ 0.31
Diluted earnings per share	$ 0.35	$ 0.31
Stock Options [Member]
Earnings Per Share Reconciliation [Line Items]
Incremental common shares attributable to exercise of dilutive options	6	24
Restricted Stock Units [Member]
Earnings Per Share Reconciliation [Line Items]
Incremental common shares attributable to exercise of dilutive options	250	201