Loans (Period-End Balances And Various Asset Quality Attributes By Origination Vintage For The HELOC) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 15,119,461	$ 15,389,074	$ 15,889,670
Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	2,747,817		3,108,574
Avg orig FICO	741		740
Avg Refreshed FICO	731		729
Loans, net of unearned income	2,747,817		3,108,574
Home Equity [Member] | Origination Vintage Period Pre2003 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	73,926		108,054
Avg orig FICO	710		714
Avg Refreshed FICO	703		705
Home Equity [Member] | Origination Vintage Period 2003 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	130,144		208,233
Avg orig FICO	723		732
Avg Refreshed FICO	709		723
Home Equity [Member] | Origination Vintage Period 2004 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	375,252		469,608
Avg orig FICO	726		727
Avg Refreshed FICO	715		717
Home Equity [Member] | Origination Vintage Period 2005 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	517,957		592,322
Avg orig FICO	732		734
Avg Refreshed FICO	721		719
Home Equity [Member] | Origination Vintage Period 2006 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	375,022		437,889
Avg orig FICO	740		740
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	396,409		460,916
Avg orig FICO	743		745
Avg Refreshed FICO	728		728
Home Equity [Member] | Origination Vintage Period 2008 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	217,360		250,427
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	113,703		134,294
Avg orig FICO	751		752
Avg Refreshed FICO	746		745
Home Equity [Member] | Origination Vintage Period 2010 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	110,958		133,917
Avg orig FICO	753		753
Avg Refreshed FICO	748		749
Home Equity [Member] | Origination Vintage Period 2011 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	110,815		129,303
Avg orig FICO	758		759
Avg Refreshed FICO	754		756
Home Equity [Member] | Origination Vintage Period 2012 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	133,618		155,758
Avg orig FICO	759		760
Avg Refreshed FICO	759		758
Home Equity [Member] | Origination Vintage Period 2013 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	169,429		27,853
Avg orig FICO	760		756
Avg Refreshed FICO	757		754
Home Equity [Member] | Origination Vintage Period 2014 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC - Period End Balance	$ 23,224		$ 0
Avg orig FICO	756		0
Avg Refreshed FICO	755		0