Accumulated Other Comprehensive Income (Schedule Of Amounts Reclassified Out of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net securities gains reclassified into earnings	$ 0	$ 283
Related income tax expense	(5,251)	(4,987)
Net income available to common shareholders	21,342	19,814
Securities available-for-sale: | Amounts reclassified from Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net securities gains reclassified into earnings	0	283
Related income tax expense	0	(68)
Net income available to common shareholders	$ 0	$ 215