Loans (Period-End Balances And Various Asset Quality Attributes By Origination Vintage For The HELOC) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011	Sep. 30, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 16,523,783	[1],[2]	$ 16,397,127	$ 16,241,402	[1],[2]
Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Avg orig FICO	740			740
Avg Refreshed FICO	731			730
Loans, net of unearned income	3,335,635	[3]		3,787,049	[3]
Home Equity [Member] | Origination Vintage Period Pre2003 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	135,605			194,070
Avg orig FICO	718			723
Avg Refreshed FICO	710			719
Home Equity [Member] | Origination Vintage Period 2003 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	235,546			285,848
Avg orig FICO	733			734
Avg Refreshed FICO	724			727
Home Equity [Member] | Origination Vintage Period 2004 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	514,791			611,791
Avg orig FICO	728			728
Avg Refreshed FICO	718			720
Home Equity [Member] | Origination Vintage Period 2005 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	642,027			759,689
Avg orig FICO	734			734
Avg Refreshed FICO	719			722
Home Equity [Member] | Origination Vintage Period 2006 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	474,706			568,673
Avg orig FICO	741			741
Avg Refreshed FICO	726			726
Home Equity [Member] | Origination Vintage Period 2007 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	498,011			582,307
Avg orig FICO	745			746
Avg Refreshed FICO	729			732
Home Equity [Member] | Origination Vintage Period 2008 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	267,346			300,211
Avg orig FICO	755			755
Avg Refreshed FICO	748			750
Home Equity [Member] | Origination Vintage Period 2009 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	152,687			185,662
Avg orig FICO	753			755
Avg Refreshed FICO	748			755
Home Equity [Member] | Origination Vintage Period 2010 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	150,243			182,186
Avg orig FICO	754			755
Avg Refreshed FICO	752			757
Home Equity [Member] | Origination Vintage Period 2011 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	146,768			116,612
Avg orig FICO	759			757
Avg Refreshed FICO	758			757
Home Equity [Member] | Origination Vintage Period 2012 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	$ 117,905
Avg orig FICO	761
Avg Refreshed FICO	759

[1] Balances as of September 30, 2012 and 2011 include $14.7 million and $26.9 million of reserves, respectively, and $417.0 million and $623.3 million of balances in restricted consumer real estate loans and secured borrowings, respectively.

[2] Balances as of September 30, 2012 and 2011 include $.6 million and $5.5 million of reserves, respectively, and $14.2 million and $42.4 million of balances in restricted permanent mortgage loans and secured borrowings, respectively.

[3] Balances as of September 30, 2012 and 2011 include $417.0 million and $623.3 million of restricted loan and secured borrowing balances