Summary Of Significant Accounting Policies (Schedule Of Calculation Of Basic And Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share Reconciliation [Line Items]
Net income	$ 35,770	$ 14,055	$ 23,425
Denominator for basic earnings per share – weighted-average number of common shares outstanding during the period	35,655	36,524	38,338
Denominator for diluted earnings per share	36,101	36,817	38,763
Basic	$ 1.00	$ 0.38	$ 0.61
Diluted	$ 0.99	$ 0.38	$ 0.60
Stock Options [Member]
Earnings Per Share Reconciliation [Line Items]
Incremental common shares attributable to exercise of dilutive options	39	36	90
Restricted Stock Units [Member]
Earnings Per Share Reconciliation [Line Items]
Incremental common shares attributable to exercise of dilutive options	407	257	335