Fair Value Of Assets And Liabilities (Nonrecurring Fair Value Measurements) (Details) (USD $)	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013		Dec. 31, 2013
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	$ 31,443,000		$ 229,760,000		$ 31,443,000		$ 229,760,000
Loans, net of unearned income	15,812,017,000		15,408,556,000		15,812,017,000		15,408,556,000		15,389,074,000
Real estate acquired by foreclosure	47,996,000		71,626,000		47,996,000		71,626,000		71,562,000
Other assets	162,643,000		238,309,000		162,643,000		238,309,000
Net gains/(losses), Loans, net of unearned income	1,259,000	[1]	(1,177,000)	[1]	2,504,000	[1]	(3,154,000)	[1]
Net gains/(losses), Real estate acquired by foreclosure	(707,000)	[2]	(327,000)	[2]	(2,098,000)	[2]	(3,278,000)	[2]
Net gains/(losses), Other assets	(698,000)	[3]	(1,153,000)	[3]	(2,779,000)	[3]	(4,199,000)	[3]
Gain (loss) on financial assets measured on non-recurring basis	(501,000)		(2,293,000)		(2,695,000)		(10,327,000)
Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans, net of unearned income	46,634,000	[1]	82,254,000	[1]	46,634,000	[1]	82,254,000	[1]
Real estate acquired by foreclosure	35,261,000	[2]	50,030,000	[2]	35,261,000	[2]	50,030,000	[2]
Other assets	65,393,000	[3]	69,115,000	[3]	65,393,000	[3]	69,115,000	[3]
Fair Value Inputs Level2 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	0		0		0		0
Other assets	134,561,000		198,239,000		134,561,000		198,239,000
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]	0	[1]	0	[1]
Real estate acquired by foreclosure	0	[2]	0	[2]	0	[2]	0	[2]
Other assets	0	[3]	0	[3]	0	[3]	0	[3]
Fair Value Inputs Level3 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	31,443,000		229,760,000		31,443,000		229,760,000
Other assets	0		0		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	46,634,000	[1]	82,254,000	[1]	46,634,000	[1]	82,254,000	[1]
Real estate acquired by foreclosure	35,261,000	[2]	50,030,000	[2]	35,261,000	[2]	50,030,000	[2]
Other assets	65,393,000	[3]	69,115,000	[3]	65,393,000	[3]	69,115,000	[3]
Fair Value Inputs Level1 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	0		0		0		0
Other assets	28,082,000		40,070,000		28,082,000		40,070,000
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]	0	[1]	0	[1]
Real estate acquired by foreclosure	0	[2]	0	[2]	0	[2]	0	[2]
Other assets	0	[3]	0	[3]	0	[3]	0	[3]
First Mortgage [Member]
Fair Value Of Assets And Liabilities [Line Items]
Net gains/(losses), Loans held for sale	(351,000)		364,000		(361,000)		304,000
First Mortgage [Member] | Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	981,000		9,632,000		981,000		9,632,000
First Mortgage [Member] | Fair Value Inputs Level2 [Member] | Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	0		0		0		0
First Mortgage [Member] | Fair Value Inputs Level3 [Member] | Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	981,000		9,632,000		981,000		9,632,000
First Mortgage [Member] | Fair Value Inputs Level1 [Member] | Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	0		0		0		0
Small Business Administrations [Member]
Fair Value Of Assets And Liabilities [Line Items]
Net gains/(losses), Loans held for sale	(4,000)				39,000
Small Business Administrations [Member] | Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	7,552,000				7,552,000
Small Business Administrations [Member] | Fair Value Inputs Level2 [Member] | Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	7,552,000				7,552,000
Small Business Administrations [Member] | Fair Value Inputs Level3 [Member] | Fair Value Measurements Nonrecurring [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 Measurements Nonrecurring [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.