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, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share Reconciliation [Line Items]
Net income	$ 17,221	$ 7,369	$ 28,181	$ 15,286
Denominator for basic earnings per share – weighted-average number of common shares outstanding during the period	35,157	35,753	35,201	36,000
Denominator for diluted earnings per share	35,336	36,061	35,616	36,474
Basic earnings per share	$ 0.49	$ 0.21	$ 0.80	$ 0.42
Diluted earnings per share	$ 0.49	$ 0.20	$ 0.79	$ 0.42
Stock Options [Member]
Earnings Per Share Reconciliation [Line Items]
Incremental common shares attributable to exercise of dilutive options	9	45	21	49
Restricted Stock Units [Member]
Earnings Per Share Reconciliation [Line Items]
Incremental common shares attributable to exercise of dilutive options	170	263	394	425