Fair Value Of Assets And Liabilities (Nonrecurring Fair Value Measurements) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Dec. 31, 2013
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	$ 229,219		$ 232,684
Loans, net of unearned income	15,119,461		15,889,670		15,389,074
Real estate acquired by foreclosure	66,035		54,672		71,562
Other assets	189,800		297,117
Net gains/(losses), Loans, net of unearned income	(488)		(206)
Net gains/(losses), Real estate acquired by foreclosure	(858)		(1,018)
Net gains/(losses), Other assets	(1,252)		(1,609)
Gain (loss) on financial assets measured on non-recurring basis	(2,573)		(2,749)
Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans, net of unearned income	57,035	[1]	121,360	[1]
Real estate acquired by foreclosure	42,970	[2]	32,655	[2]
Other assets	64,210	[3]	74,109	[3]
Fair Value Inputs Level2 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	0		0
Other assets	162,450		258,539
Fair Value Inputs Level2 [Member] | Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans, net of unearned income	0	[1]	0	[1]
Real estate acquired by foreclosure	0	[2]	0	[2]
Other assets	0	[3]	0	[3]
Fair Value Inputs Level3 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	229,219		232,684
Other assets	0		0
Fair Value Inputs Level3 [Member] | Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans, net of unearned income	57,035	[1]	121,360	[1]
Real estate acquired by foreclosure	42,970	[2]	32,655	[2]
Other assets	64,210	[3]	74,109	[3]
Fair Value Inputs Level1 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	0		0
Other assets	27,350		38,578
Fair Value Inputs Level1 [Member] | Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans, net of unearned income	0	[1]	0	[1]
Real estate acquired by foreclosure	0	[2]	0	[2]
Other assets	0	[3]	0	[3]
First Mortgage [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	9,191		11,633
Net gains/(losses), Loans held for sale	(17)		84
First Mortgage [Member] | Fair Value Inputs Level2 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	0		0
First Mortgage [Member] | Fair Value Inputs Level3 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	9,191		11,633
First Mortgage [Member] | Fair Value Inputs Level1 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	0		0
Small Business Administrations [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	3,494		8,156
Net gains/(losses), Loans held for sale	42		0
Small Business Administrations [Member] | Fair Value Inputs Level2 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	3,494		8,156
Small Business Administrations [Member] | Fair Value Inputs Level3 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	0		0
Small Business Administrations [Member] | Fair Value Inputs Level1 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	$ 0		$ 0

[1] Represents carrying value of loans for which adjustments are required to be based on the appraised value of the collateral. Write-downs on these loans are recognized as part of provision.

[2] Represents the fair value and related losses of foreclosed properties that were measured subsequent to their initial classification as foreclosed assets. Balance excludes foreclosed real estate related to government insured mortgages.

[3] Represents tax credit investments.