Schedule Of Amounts Reclassified Out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net securities gains reclassified into earnings	$ (2,339)	$ 163
Related income tax expense	(7,322)	(5,810)
Net income available to common shareholders	29,000	21,619
Unrealized Gain (Losses) on Securities Available-for-Sale | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net securities gains reclassified into earnings	63	88
Related income tax expense	(15)	(21)
Net income available to common shareholders	$ 48	$ 67