Fair Value Of Assets And Liabilities (Nonrecurring Fair Value Measurements) (Details) - USD ($) $ in Thousands		Jun. 30, 2018		Dec. 31, 2017		Jun. 30, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale (elected fair value)		$ 18,940		$ 20,881
Loans, net of unearned income		27,701,740	[1]	27,658,929	[1]	$ 19,989,319
OREO	[2]	29,712		43,382
Non Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net of unearned income		29,061		26,666
OREO		26,457		39,566
Other assets		24,699		26,521
Non Recurring | Loans held-for-sale—first mortgages
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale (elected fair value)		607		618
Non Recurring | Loans held-for-sale—SBAs and USDA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale (elected fair value)		579,523		466,977
Non Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net of unearned income		0		0
OREO		0		0
Other assets		0		0
Non Recurring | Level 1 | Loans held-for-sale—first mortgages
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale (elected fair value)		0		0
Non Recurring | Level 1 | Loans held-for-sale—SBAs and USDA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale (elected fair value)		0		0
Non Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net of unearned income		0		0
OREO		0		0
Other assets		0		0
Non Recurring | Level 2 | Loans held-for-sale—first mortgages
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale (elected fair value)		0		0
Non Recurring | Level 2 | Loans held-for-sale—SBAs and USDA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale (elected fair value)		578,498		465,504
Non Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans, net of unearned income		29,061		26,666
OREO		26,457		39,566
Other assets		24,699		26,521
Non Recurring | Level 3 | Loans held-for-sale—first mortgages
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale (elected fair value)		607		618
Non Recurring | Level 3 | Loans held-for-sale—SBAs and USDA
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale (elected fair value)		$ 1,025		$ 1,473

[1] June 30, 2018 and December 31, 2017 include $21.4 million and $22.7 million, respectively, of held-to-maturity consumer mortgage loans secured by residential real estate in process of foreclosure.

[2] June 30, 2018 and December 31, 2017 include $6.1 million and $6.3 million, respectively, of foreclosed residential real estate.