Loans (Period-End Balances And Various Asset Quality Attributes By Originations Vintage For R/E Installment Loans) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 16,197,046	$ 16,708,582	$ 16,185,763
Real Estate Installment Class [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	2,533,560		2,367,234
Avg orig FICO	745		739
Avg Refreshed FICO	742		733
Real Estate Installment Class [Member] | Origination Vintage Period Pre2003 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	29,998		46,628
Avg orig FICO	683		688
Avg Refreshed FICO	684		686
Real Estate Installment Class [Member] | Origination Vintage Period 2003 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	90,764		134,820
Avg orig FICO	718		721
Avg Refreshed FICO	728		731
Real Estate Installment Class [Member] | Origination Vintage Period 2004 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	61,949		84,741
Avg orig FICO	702		708
Avg Refreshed FICO	705		705
Real Estate Installment Class [Member] | Origination Vintage Period Two Thousand Five [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	183,982		239,744
Avg orig FICO	717		719
Avg Refreshed FICO	712		714
Real Estate Installment Class [Member] | Origination Vintage Period Two Thousand Six [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	197,308		261,208
Avg orig FICO	716		720
Avg Refreshed FICO	704		706
Real Estate Installment Class [Member] | Origination Vintage Period Two Thousand Seven [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	283,175		364,488
Avg orig FICO	726		728
Avg Refreshed FICO	711		712
Real Estate Installment Class [Member] | Origination Vintage Period 2008 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	98,690		131,770
Avg orig FICO	724		729
Avg Refreshed FICO	719		725
Real Estate Installment Class [Member] | Origination Vintage Period 2009 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	46,487		77,922
Avg orig FICO	746		750
Avg Refreshed FICO	740		749
Real Estate Installment Class [Member] | Origination Vintage Period 2010 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	138,621		173,949
Avg orig FICO	747		746
Avg Refreshed FICO	753		754
Real Estate Installment Class [Member] | Origination Vintage Period 2011 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	365,971		449,788
Avg orig FICO	760		761
Avg Refreshed FICO	762		759
Real Estate Installment Class [Member] | Origination Vintage Period 2012 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	727,688		402,176
Avg orig FICO	764		765
Avg Refreshed FICO	764		763
Real Estate Installment Class [Member] | Origination Vintage Period 2013 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	$ 308,927
Avg orig FICO	759
Avg Refreshed FICO	758