Fair Value Of Assets And Liabilities (Nonrecurring Fair Value Measurements) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012		Dec. 31, 2012
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	$ 235,080		$ 223,483		$ 235,080		$ 223,483
Loans, net of unearned income	16,197,046		16,185,763		16,197,046		16,185,763		16,708,582
Real estate acquired by foreclosure	70,368		69,603		70,368		69,603		60,690
Other assets	258,061		363,455		258,061		363,455
Net gains/(losses), Loans, net of unearned income	(1,771)	[1]	(5,963)	[1]	(1,977)	[1]	(17,350)	[1]
Net gains/(losses), Real estate acquired by foreclosure	(1,933)	[2]	(2,078)	[2]	(2,952)	[2]	(5,140)	[2]
Net gains/(losses), Other assets	(1,437)		(1,219)		(3,046)		(3,204)
Gain (loss) on financial assets measured on non-recurring basis	(5,285)		(9,700)		(8,035)		(25,362)
Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans, net of unearned income	109,488	[1]	106,864	[1]	109,488	[1]	106,864	[1]
Real estate acquired by foreclosure	51,809	[2]	48,916	[2]	51,809	[2]	48,916	[2]
Other assets	71,483	[3]	82,287	[3]	71,483	[3]	82,287	[3]
Fair Value Inputs Level2 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	0		8,923		0		8,923
Other assets	209,357		318,287		209,357		318,287
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	235,080		214,560		235,080		214,560
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	109,488	[1]	106,864	[1]	109,488	[1]	106,864	[1]
Real estate acquired by foreclosure	51,809	[2]	48,916	[2]	51,809	[2]	48,916	[2]
Other assets	71,483	[3]	82,287	[3]	71,483	[3]	82,287	[3]
Fair Value Inputs Level1 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	0		0		0		0
Other assets	48,704		45,168		48,704		45,168
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	(144)		(452)		(60)		316
First Mortgage [Member] | Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	10,607		14,691		10,607		14,691
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	10,607		14,691		10,607		14,691
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			12				16
Small Business Administrations [Member] | Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale			53,807				53,807
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			53,807				53,807
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.