Loans (Period-End Balances And Various Asset Quality Attributes By Origination Vintage For The HELOC) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 15,812,017,000	$ 15,389,074,000	$ 15,408,556,000
Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	2,558,295,000		2,896,532,000
Avg orig FICO	741		741
Avg Refreshed FICO	732		730
Loans, net of unearned income	2,558,295,000		2,896,532,000
Home Equity [Member] | Origination Vintage Period Pre2003 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	61,659,000		88,416,000
Avg orig FICO	708		711
Avg Refreshed FICO	703		702
Home Equity [Member] | Origination Vintage Period 2003 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	111,031,000		163,576,000
Avg orig FICO	722		728
Avg Refreshed FICO	709		714
Home Equity [Member] | Origination Vintage Period 2004 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	312,590,000		421,542,000
Avg orig FICO	724		727
Avg Refreshed FICO	711		717
Home Equity [Member] | Origination Vintage Period 2005 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	476,226,000		548,756,000
Avg orig FICO	732		733
Avg Refreshed FICO	722		720
Home Equity [Member] | Origination Vintage Period 2006 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	351,818,000		400,023,000
Avg orig FICO	740		741
Avg Refreshed FICO	727		725
Home Equity [Member] | Origination Vintage Period 2007 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	369,635,000		421,964,000
Avg orig FICO	744		744
Avg Refreshed FICO	729		728
Home Equity [Member] | Origination Vintage Period 2008 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	200,908,000		233,642,000
Avg orig FICO	753		754
Avg Refreshed FICO	748		747
Home Equity [Member] | Origination Vintage Period 2009 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	105,576,000		121,555,000
Avg orig FICO	752		750
Avg Refreshed FICO	743		744
Home Equity [Member] | Origination Vintage Period 2010 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	100,727,000		120,022,000
Avg orig FICO	754		753
Avg Refreshed FICO	749		750
Home Equity [Member] | Origination Vintage Period 2011 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	100,842,000		119,553,000
Avg orig FICO	759		758
Avg Refreshed FICO	753		754
Home Equity [Member] | Origination Vintage Period 2012 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	121,149,000		145,507,000
Avg orig FICO	759		759
Avg Refreshed FICO	757		759
Home Equity [Member] | Origination Vintage Period 2013 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	158,256,000		111,976,000
Avg orig FICO	759		762
Avg Refreshed FICO	760		761
Home Equity [Member] | Origination Vintage Period 2014 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	$ 87,878,000		$ 0
Avg orig FICO	761		0
Avg Refreshed FICO	761		0