Loans (Schedule Of Loans By Portfolio Segment) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012		Mar. 31, 2012	Dec. 31, 2011		Jun. 30, 2011		Mar. 31, 2011	Dec. 31, 2010
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 16,185,763	[1],[2]		$ 16,397,127		$ 16,061,646	[1],[2]
Allowance for loan losses	321,051	[1],[2]	346,016	384,351		524,091	[1],[2]	589,128	664,799
Total net loans	15,864,712			16,012,776		15,537,555
Commercial, Financial, And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	7,981,365					7,180,261
Consumer Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	5,855,564					6,032,401
Permanent Mortgage Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	755,707	[3]				1,059,975	[4]
Credit Card & Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	278,958					295,373
Commercial [Member] | Commercial, Financial, And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	7,981,365			8,014,927		7,180,261
Commercial [Member] | Income CRE [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,224,944			1,257,497		1,310,779
Commercial [Member] | Residential CRE [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	89,225			120,913		182,857
Retail [Member] | Consumer Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	5,408,105			5,291,364		5,383,223
Retail [Member] | Permanent Mortgage Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	738,766			787,597		1,015,122
Retail [Member] | Credit Card & Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	278,958			284,051		295,373
Retail [Member] | Restricted Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	464,400	[5]		640,778	[5]	694,031	[5]
Restricted Consumer Real Estate Loans And Secured Borrowings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	447,500			600,200		649,200
Allowance for loan losses	19,000					29,900
Restricted Permanent Mortgage Real Estate Loans And Secured Borrowings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	16,900			40,600		44,900
Allowance for loan losses	$ 1,300					$ 3,100

[1] Balances as of June 30, 2012 and 2011 include $19.0 million and $29.9 million of reserves, respectively, and $447.5 million and $649.2 million of balances in restricted consumer real estate loans and secured borrowings, respectively.

[2] Balances as of June 30, 2012 and 2011 include $1.3 million and $3.1 million of reserves, respectively, and $16.9 million and $44.9 million of balances in restricted permanent mortgage loans and secured borrowings, respectively.

[3] Includes restricted real estate loans and secured borrowings.

[4] Includes restricted real estate loans and secured borrowings

[5] Balances as of June 30, 2012 and 2011, and December 31, 2011, include $447.5 million, $649.2 million, and $600.2 million of consumer real estate loans and $16.9 million, $44.9 million, and $40.6 million of permanent mortgage loans, respectively