Loans (Period-End Balances And Various Asset Quality Attributes By Originations Vintage For R/E Installment Loans) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 15,889,670	$ 16,708,582	$ 15,971,330
Real Estate Installment Class [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	2,481,606		2,276,367
Avg orig FICO	744		737
Avg Refreshed FICO	739		729
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	33,454		51,213
Avg orig FICO	685		689
Avg Refreshed FICO	682		685
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	101,107		147,224
Avg orig FICO	719		722
Avg Refreshed FICO	727		730
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	66,809		90,717
Avg orig FICO	703		709
Avg Refreshed FICO	701		707
Real Estate Installment Class [Member] | Origination Vintage Period 2005 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	197,153		254,045
Avg orig FICO	717		720
Avg Refreshed FICO	711		713
Real Estate Installment Class [Member] | Origination Vintage Period 2006 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	209,755		277,821
Avg orig FICO	718		720
Avg Refreshed FICO	703		704
Real Estate Installment Class [Member] | Origination Vintage Period 2007 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	299,659		389,145
Avg orig FICO	726		729
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	104,651		143,844
Avg orig FICO	725		733
Avg Refreshed FICO	716		724
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	53,302		84,485
Avg orig FICO	746		750
Avg Refreshed FICO	744		748
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	146,048		187,301
Avg orig FICO	746		746
Avg Refreshed FICO	750		756
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	390,546		462,341
Avg orig FICO	760		761
Avg Refreshed FICO	761		758
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	741,406		188,231
Avg orig FICO	764		765
Avg Refreshed FICO	762		767
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	$ 137,716
Avg orig FICO	761
Avg Refreshed FICO	759