Loans (Period-End Balances And Various Asset Quality Attributes By Originations Vintage For R/E Installment Loans) (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014	Mar. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 16,732,123,000	[1]	$ 16,230,166,000	$ 15,119,461,000
Real Estate Installment Class
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	2,558,007,000			2,510,197,000
Avg orig FICO	749			746
Avg Refreshed FICO	747			743
Real Estate Installment Class | Origination Vintage Period Pre 2003
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	11,786,000			21,069,000
Avg orig FICO	679			681
Avg Refreshed FICO	687			687
Real Estate Installment Class | Origination Vintage Period 2003
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	44,729,000			68,747,000
Avg orig FICO	713			715
Avg Refreshed FICO	721			724
Real Estate Installment Class | Origination Vintage Period 2004
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	37,944,000			51,187,000
Avg orig FICO	699			701
Avg Refreshed FICO	695			699
Real Estate Installment Class | Origination Vintage Period 2005
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	115,702,000			150,669,000
Avg orig FICO	715			716
Avg Refreshed FICO	710			711
Real Estate Installment Class | Origination Vintage Period 2006
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	126,225,000			165,515,000
Avg orig FICO	712			715
Avg Refreshed FICO	702			700
Real Estate Installment Class | Origination Vintage Period 2007
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	187,510,000			236,727,000
Avg orig FICO	722			724
Avg Refreshed FICO	707			708
Real Estate Installment Class | Origination Vintage Period 2008
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	60,538,000			80,067,000
Avg orig FICO	718			722
Avg Refreshed FICO	712			718
Real Estate Installment Class | Origination Vintage Period 2009
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	26,812,000			37,048,000
Avg orig FICO	737			742
Avg Refreshed FICO	727			733
Real Estate Installment Class | Origination Vintage Period 2010
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	95,017,000			120,128,000
Avg orig FICO	747			748
Avg Refreshed FICO	756			754
Real Estate Installment Class | Origination Vintage Period 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	267,079,000			323,992,000
Avg orig FICO	760			760
Avg Refreshed FICO	759			759
Real Estate Installment Class | Origination Vintage Period 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	586,729,000			675,368,000
Avg orig FICO	764			764
Avg Refreshed FICO	765			765
Real Estate Installment Class | Origination Vintage Period 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	460,196,000			509,103,000
Avg orig FICO	756			757
Avg Refreshed FICO	758			753
Real Estate Installment Class | Origination Vintage Period 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	450,765,000			70,577,000
Avg orig FICO	756			756
Avg Refreshed FICO	754			750
Real Estate Installment Class | Origination Vintage Period 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance	$ 86,975,000			$ 0
Avg orig FICO	757			0
Avg Refreshed FICO	758			0

[1] (b) March 31, 2015 includes $28.0 million of held-to-maturity consumer mortgage loans secured by residential real estate properties in process of foreclosure.