Accumulated Other Comprehensive Income (Schedule Of Amounts Reclassified Out of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net securities gains reclassified into earnings	$ 0	$ 0	$ 0	$ 312
Related income tax expense	(7,421)	(6,250)	(18,438)	(16,877)
Net income available to common shareholders	27,374	22,732	71,408	64,694
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	0	0	312
Related income tax expense	0	0	0	(75)
Net income available to common shareholders	$ 0	$ 0	$ 0	$ 237