Segments (Schedule Of Financial Information By Segment) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023		Sep. 30, 2022
Segment Reporting Information [Line Items]
Net interest income	$ 248,547	$ 246,373	$ 749,708		$ 687,544
Provision for credit losses	(11,645)	(15,290)	(29,572)		(12,594)
Non-interest income	142,949	138,514	428,166		409,710
INVESTMENT SECURITIES GAINS (LOSSES), NET	4,298	3,410	7,384	[1]	11,602	[1]
Non-interest expense	(228,010)	(212,884)	(679,728)		(632,037)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	156,139	160,123	475,958		464,225
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Net interest income	(597)	20,416	34,966		26,982
Provision for credit losses	(1,875)	(10,475)	(6,570)		782
Non-interest income	1,437	(172)	6,270		(1,386)
INVESTMENT SECURITIES GAINS (LOSSES), NET	4,298	3,410	7,384		11,602
Non-interest expense	(7,959)	(6,069)	(26,762)		(19,168)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(4,696)	7,110	15,288		18,812
Consumer segment | Operating Segments
Segment Reporting Information [Line Items]
Net interest income	106,453	93,182	304,859		270,561
Provision for credit losses	(7,048)	(4,314)	(19,784)		(12,727)
Non-interest income	24,939	27,709	74,773		82,464
INVESTMENT SECURITIES GAINS (LOSSES), NET	0	0	0		0
Non-interest expense	(82,234)	(79,230)	(242,991)		(231,683)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	42,110	37,347	116,857		108,615
Commercial segment | Operating Segments
Segment Reporting Information [Line Items]
Net interest income	123,062	114,135	355,690		333,270
Provision for credit losses	(2,721)	(506)	(3,204)		(651)
Non-interest income	61,195	57,115	184,288		167,581
INVESTMENT SECURITIES GAINS (LOSSES), NET	0	0	0		0
Non-interest expense	(98,910)	(91,397)	(290,960)		(272,219)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	82,626	79,347	245,814		227,981
Wealth segment | Operating Segments
Segment Reporting Information [Line Items]
Net interest income	19,629	18,640	54,193		56,731
Provision for credit losses	(1)	5	(14)		2
Non-interest income	55,378	53,862	162,835		161,051
INVESTMENT SECURITIES GAINS (LOSSES), NET	0	0	0		0
Non-interest expense	(38,907)	(36,188)	(119,015)		(108,967)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	36,099	36,319	97,999		108,817
Segment Totals
Segment Reporting Information [Line Items]
Net interest income	249,144	225,957	714,742		660,562
Provision for credit losses	(9,770)	(4,815)	(23,002)		(13,376)
Non-interest income	141,512	138,686	421,896		411,096
INVESTMENT SECURITIES GAINS (LOSSES), NET	0	0	0		0
Non-interest expense	(220,051)	(206,815)	(652,966)		(612,869)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	$ 160,835	$ 153,013	$ 460,670		$ 445,413

[1] Available for sale debt securities, equity securities, and other securities.