Loans (Period-End Balances And Various Asset Quality Attributes By Origination Vintage For Permanent Mortgage Classes Of Loans) (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]
Permanent Mortgage Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Permanent Mortgage - Period End Balance	805,511	[3]		880,459	[3]
Avg orig FICO	732			729
Avg Refreshed FICO	712			700
Loans, net of unearned income	805,511	[4]		880,459	[5]
Permanent Mortgage Portfolio Segment [Member] | Origination Vintage Period Pre2004 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Permanent Mortgage - Period End Balance	220,499			190,304
Avg orig FICO	726			726
Avg Refreshed FICO	729			733
Permanent Mortgage Portfolio Segment [Member] | Origination Vintage Period 2004 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Permanent Mortgage - Period End Balance	31,422			11,965
Avg orig FICO	715			711
Avg Refreshed FICO	692			688
Permanent Mortgage Portfolio Segment [Member] | Origination Vintage Period 2005 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Permanent Mortgage - Period End Balance	52,058			66,060
Avg orig FICO	739			736
Avg Refreshed FICO	716			729
Permanent Mortgage Portfolio Segment [Member] | Origination Vintage Period 2006 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Permanent Mortgage - Period End Balance	94,898			122,741
Avg orig FICO	734			730
Avg Refreshed FICO	706			696
Permanent Mortgage Portfolio Segment [Member] | Origination Vintage Period 2007 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Permanent Mortgage - Period End Balance	275,594			325,726
Avg orig FICO	734			728
Avg Refreshed FICO	712			693
Permanent Mortgage Portfolio Segment [Member] | Origination Vintage Period 2008 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Permanent Mortgage - Period End Balance	131,040			163,663
Avg orig FICO	742			731
Avg Refreshed FICO	712			687
Restricted Permanent Mortgage Real Estate Loans And Secured Borrowings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 14,200		$ 40,600	$ 42,400

[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 $14.2 million and $42.4 million of restricted loan and secured borrowing balances.

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

[5] Includes restricted real estate loans and secured borrowings