Accumulated Other Comprehensive Income (Schedule Of Amounts Reclassified Out of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net securities gains reclassified into earnings	$ 0	$ 29	$ 0	$ 312
Related income tax expense	(5,767)	(5,640)	(11,018)	(10,627)
Net income available to common shareholders	22,683	22,148	44,025	41,962
Securities available-for-sale: | Amounts reclassified from Other Comprehensive (Loss) Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net securities gains reclassified into earnings	0	29	0	312
Related income tax expense	0	(7)	0	(75)
Net income available to common shareholders	$ 0	$ 22	$ 0	$ 237