Loans (Period-End Balances And Various Asset Quality Attributes By Origination Vintage For The HELOC) (Details)	Jun. 30, 2015 USD ($) number		Dec. 31, 2014 USD ($)	Jun. 30, 2014 USD ($) number
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income | $	$ 16,936,772,000	[1]	$ 16,230,166,000	$ 15,795,709,000
Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance | $	$ 2,262,500,000			$ 2,666,090,000
Avg orig FICO	742			741
Avg Refreshed FICO	732			732
Loans, net of unearned income | $	$ 2,262,500,000			$ 2,666,090,000
Home Equity | Origination Vintage Period Pre 2003
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance | $	$ 46,789,000			$ 68,332,000
Avg orig FICO	708			708
Avg Refreshed FICO	703			703
Home Equity | Origination Vintage Period 2003
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance | $	$ 86,928,000			$ 120,962,000
Avg orig FICO	720			723
Avg Refreshed FICO	709			710
Home Equity | Origination Vintage Period 2004
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance | $	$ 236,022,000			$ 346,431,000
Avg orig FICO	723			725
Avg Refreshed FICO	708			713
Home Equity | Origination Vintage Period 2005
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance | $	$ 382,946,000			$ 500,404,000
Avg orig FICO	730			732
Avg Refreshed FICO	718			722
Home Equity | Origination Vintage Period 2006
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance | $	$ 306,652,000			$ 365,886,000
Avg orig FICO	739			740
Avg Refreshed FICO	727			728
Home Equity | Origination Vintage Period 2007
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance | $	$ 327,360,000			$ 384,391,000
Avg orig FICO	744			743
Avg Refreshed FICO	729			729
Home Equity | Origination Vintage Period 2008
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance | $	$ 183,224,000			$ 208,637,000
Avg orig FICO	753			753
Avg Refreshed FICO	748			748
Home Equity | Origination Vintage Period 2009
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance | $	$ 92,774,000			$ 110,934,000
Avg orig FICO	752			751
Avg Refreshed FICO	744			745
Home Equity | Origination Vintage Period 2010
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance | $	$ 88,337,000			$ 106,954,000
Avg orig FICO	754			753
Avg Refreshed FICO	747			750
Home Equity | Origination Vintage Period 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance | $	$ 86,584,000			$ 105,295,000
Avg orig FICO	758			759
Avg Refreshed FICO	751			755
Home Equity | Origination Vintage Period 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance | $	$ 107,715,000			$ 128,733,000
Avg orig FICO	760			759
Avg Refreshed FICO	757			759
Home Equity | Origination Vintage Period 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance | $	$ 136,449,000			$ 167,149,000
Avg orig FICO	757			760
Avg Refreshed FICO	757			760
Home Equity | Origination Vintage Period 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance | $	$ 120,544,000			$ 51,982,000
Avg orig FICO	761			760
Avg Refreshed FICO	763			762
Home Equity | Origination Vintage Period 2015 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance | $	$ 60,176,000			$ 0
Avg orig FICO	764			0
Avg Refreshed FICO	763			0

[1] June 30, 2015 includes $28.3 million of held-to-maturity consumer mortgage loans secured by residential real estate in process of foreclosure.