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, 2023	Dec. 31, 2022	Dec. 31, 2021
Earnings Per Share Reconciliation [Line Items]
Net Income (Loss)	$ 64,315	$ 68,229	$ 35,770
Denominator for basic earnings per share	35,566	35,179	35,655
Denominator for diluted earnings per share	35,973	35,718	36,101
Earnings per share:
Basic	$ 1.81	$ 1.94	$ 1
Diluted	$ 1.79	$ 1.91	$ 0.99
Employee Stock Option [Member]
Earnings Per Share Reconciliation [Line Items]
Incremental common shares attributable to exercise of dilutive options	4	17	39
Restricted Stock Units [Member]
Earnings Per Share Reconciliation [Line Items]
Incremental common shares attributable to exercise of dilutive options	403	522	407