Loans (Period-End Balances And Various Asset Quality Attributes By Originations Vintage For R/E Installment Loans) (Details)	Sep. 30, 2015 USD ($) number		Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($) number
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income | $	$ 16,725,492,000	[1]	$ 16,230,166,000	$ 15,812,017,000
Real Estate Installment Class
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance | $	$ 2,650,344,000			$ 2,572,693,000
Avg orig FICO	750			748
Avg Refreshed FICO	749			746
Real Estate Installment Class | Origination Vintage Period Pre 2003
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance | $	$ 8,701,000			$ 16,278,000
Avg orig FICO	677			680
Avg Refreshed FICO	689			684
Real Estate Installment Class | Origination Vintage Period 2003
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance | $	$ 35,532,000			$ 55,361,000
Avg orig FICO	712			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 | $	$ 31,486,000			$ 44,484,000
Avg orig FICO	697			700
Avg Refreshed FICO	699			697
Real Estate Installment Class | Origination Vintage Period 2005
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance | $	$ 96,162,000			$ 132,276,000
Avg orig FICO	714			715
Avg Refreshed FICO	710			713
Real Estate Installment Class | Origination Vintage Period 2006
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance | $	$ 108,731,000			$ 143,601,000
Avg orig FICO	712			714
Avg Refreshed FICO	703			701
Real Estate Installment Class | Origination Vintage Period 2007
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance | $	$ 163,909,000			$ 211,780,000
Avg orig FICO	721			723
Avg Refreshed FICO	708			709
Real Estate Installment Class | Origination Vintage Period 2008
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance | $	$ 53,608,000			$ 67,730,000
Avg orig FICO	720			721
Avg Refreshed FICO	715			715
Real Estate Installment Class | Origination Vintage Period 2009
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance | $	$ 23,384,000			$ 31,524,000
Avg orig FICO	735			739
Avg Refreshed FICO	730			728
Real Estate Installment Class | Origination Vintage Period 2010
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance | $	$ 78,175,000			$ 107,417,000
Avg orig FICO	750			748
Avg Refreshed FICO	759			755
Real Estate Installment Class | Origination Vintage Period 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance | $	$ 242,096,000			$ 296,440,000
Avg orig FICO	760			760
Avg Refreshed FICO	760			759
Real Estate Installment Class | Origination Vintage Period 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance | $	$ 534,038,000			$ 628,622,000
Avg orig FICO	764			764
Avg Refreshed FICO	766			765
Real Estate Installment Class | Origination Vintage Period 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance | $	$ 424,674,000			$ 486,553,000
Avg orig FICO	756			756
Avg Refreshed FICO	757			757
Real Estate Installment Class | Origination Vintage Period 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance | $	$ 426,629,000			$ 350,627,000
Avg orig FICO	756			755
Avg Refreshed FICO	758			754
Real Estate Installment Class | Origination Vintage Period 2015 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
R/E Installment Loans- Period End Balance | $	$ 423,219,000			$ 0
Avg orig FICO	758			0
Avg Refreshed FICO	754			0

[1] September 30, 2015 includes $30.7 million of held-to-maturity consumer mortgage loans secured by residential real estate in process of foreclosure.