Fair Value Of Assets And Liabilities (Nonrecurring Fair Value Measurements) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012		Dec. 31, 2012
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	$ 229,760		$ 224,635		$ 229,760		$ 224,635
Loans, net of unearned income	15,408,556		16,523,783		15,408,556		16,523,783		16,708,582
Real estate acquired by foreclosure	71,626		70,779		71,626		70,779		60,690
Other assets	238,309		357,326		238,309		357,326
Net gains/(losses), Loans, net of unearned income	(1,177)	[1]	(44,608)	[1]	(3,154)	[1]	(61,958)	[1]
Net gains/(losses), Real estate acquired by foreclosure	(327)	[2]	(2,732)	[2]	(3,279)	[2]	(7,873)	[2]
Net gains/(losses), Other assets	(1,153)		(3,201)		(4,199)		(6,405)
Gain (loss) on financial assets measured on non-recurring basis	(2,293)		(51,212)		(10,328)		(76,576)
Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans, net of unearned income	85,665	[1]	128,626	[1]	85,665	[1]	128,626	[1]
Real estate acquired by foreclosure	50,030	[2]	50,589	[2]	50,030	[2]	50,589	[2]
Other assets	69,115	[3]	76,822	[3]	69,115	[3]	76,822	[3]
Fair Value Inputs Level2 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	0		10,996		0		10,996
Other assets	198,239		319,163		198,239		319,163
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	229,760		213,639		229,760		213,639
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	85,665	[1]	128,626	[1]	85,665	[1]	128,626	[1]
Real estate acquired by foreclosure	50,030	[2]	50,589	[2]	50,030	[2]	50,589	[2]
Other assets	69,115	[3]	76,822	[3]	69,115	[3]	76,822	[3]
Fair Value Inputs Level1 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	0		0		0		0
Other assets	40,070		38,163		40,070		38,163
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	364		(671)		304		(355)
First Mortgage [Member] | Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	9,632		13,467		9,632		13,467
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	9,632		13,467		9,632		13,467
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			0				15
Small Business Administrations [Member] | Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale			37,429				37,429
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			37,429				37,429
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.