Schedule Of Amounts Reclassified Out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net securities (losses) gains reclassified into earnings			$ 42	$ 1,155
Related income tax benefit (expense)	$ (6,193)	$ (5,606)	(17,816)	(15,369)
Net income available to common shareholders	22,371	20,692	66,741	59,283
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 (losses) gains reclassified into earnings	(40)	0	69	0
Related income tax benefit (expense)	(10)	0	(15)	0
Net income available to common shareholders	$ 30	$ 0	$ 54	$ 0