Segments (Schedule Of Financial Information By Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012 Operating_Segments	Jun. 30, 2011	Jun. 30, 2012 Operating_Segments		Jun. 30, 2011
Segment Reporting Information [Line Items]
Number of operating segments	3		3
Net interest income	$ 165,105	$ 164,710	$ 324,842		$ 325,683
Provision for loan losses	(5,215)	(12,188)	(13,380)		(27,977)
Non-interest income	100,816	101,344	195,399		197,250
Investment securities gains (losses), net	1,336	1,956	5,376	[1]	3,283	[1]
Non-interest expense	(156,340)	(153,513)	(306,801)		(307,473)
Income before income taxes	105,702	102,309	205,436		190,766
Consumer Segment [Member]
Segment Reporting Information [Line Items]
Net interest income	68,561	71,582	137,654		142,530
Provision for loan losses	(9,153)	(11,695)	(18,460)		(25,332)
Non-interest income	28,259	34,813	55,447		66,807
Investment securities gains (losses), net	0	0	0		0
Non-interest expense	(67,186)	(68,341)	(133,322)		(137,853)
Income before income taxes	20,481	26,359	41,319		46,152
Commercial Segment [Member]
Segment Reporting Information [Line Items]
Net interest income	73,260	69,948	144,889		138,779
Provision for loan losses	1,543	(3,379)	(288)		(8,497)
Non-interest income	44,944	40,309	87,838		79,455
Investment securities gains (losses), net	0	0	0		0
Non-interest expense	(56,038)	(53,534)	(111,987)		(110,370)
Income before income taxes	63,709	53,344	120,452		99,367
Wealth Segment [Member]
Segment Reporting Information [Line Items]
Net interest income	9,708	9,688	19,465		19,237
Provision for loan losses	(510)	0	(552)		(28)
Non-interest income	27,221	26,229	53,376		51,415
Investment securities gains (losses), net	0	0	0		0
Non-interest expense	(22,240)	(23,064)	(45,003)		(45,378)
Income before income taxes	14,179	12,853	27,286		25,246
Segment Totals [Member]
Segment Reporting Information [Line Items]
Net interest income	151,529	151,218	302,008		300,546
Provision for loan losses	(8,120)	(15,074)	(19,300)		(33,857)
Non-interest income	100,424	101,351	196,661		197,677
Investment securities gains (losses), net	0	0	0		0
Non-interest expense	(145,464)	(144,939)	(290,312)		(293,601)
Income before income taxes	98,369	92,556	189,057		170,765
Other/ Elimination [Member]
Segment Reporting Information [Line Items]
Net interest income	13,576	13,492	22,834		25,137
Provision for loan losses	2,905	2,886	5,920		5,880
Non-interest income	392	(7)	(1,262)		(427)
Investment securities gains (losses), net	1,336	1,956	5,376		3,283
Non-interest expense	(10,876)	(8,574)	(16,489)		(13,872)
Income before income taxes	$ 7,333	$ 9,753	$ 16,379		$ 20,001

[1] Available for sale and non-marketable securities