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, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	$ 224,635		$ 217,320		$ 224,635		$ 217,320
Net gains/(losses), Loans, net of unearned income	(44,608)	[1]	(20,130)	[1]	(61,958)	[1]	(37,890)	[1]
Net gains/(losses), Real estate acquired by foreclosure	(2,732)	[2]	(4,350)	[2]	(7,873)	[2]	(14,001)	[2]
Net gains/(losses), Other assets	(3,201)	[3]	(3,434)	[3]	(6,405)	[3]	(7,790)	[3]
Gain (loss) on financial assets measured on non-recurring basis	(51,212)		(31,803)		(76,576)		(68,189)
Fair Value Inputs Level2 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	10,996		10,468		10,996		10,468
Loans, net of unearned income, nonrecurring measurements	0	[1]	0	[1]	0	[1]	0	[1]
Real estate acquired by foreclosure, nonrecurring measurements	0	[2]	0	[2]	0	[2]	0	[2]
Other assets, nonrecurring measurements	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	213,639		206,852		213,639		206,852
Loans, net of unearned income, nonrecurring measurements	128,626	[1]	135,667	[1]	128,626	[1]	135,667	[1]
Real estate acquired by foreclosure, nonrecurring measurements	50,589	[2],[4]	80,055	[2]	50,589	[2],[4]	80,055	[2]
Other assets, nonrecurring measurements	76,822	[3]	75,129	[3]	76,822	[3]	75,129	[3]
Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans, net of unearned income, nonrecurring measurements	128,626	[1]	135,667	[1]	128,626	[1]	135,667	[1]
Real estate acquired by foreclosure, nonrecurring measurements	50,589	[2]	80,055	[2]	50,589	[2]	80,055	[2]
Other assets, nonrecurring measurements	76,822	[3]	75,129	[3]	76,822	[3]	75,129	[3]
Fair Value Inputs Level1 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale	0		0		0		0
Loans, net of unearned income, nonrecurring measurements	0	[1]	0	[1]	0	[1]	0	[1]
Real estate acquired by foreclosure, nonrecurring measurements	0	[2]	0	[2]	0	[2]	0	[2]
Other assets, nonrecurring measurements	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 - first mortgages	(671)		(3,889)		(355)		(8,506)
First Mortgage [Member] | Fair Value Inputs Level2 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale, nonrecurring measurements	0		0		0		0
First Mortgage [Member] | Fair Value Inputs Level3 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale, nonrecurring measurements	13,467		13,160		13,467		13,160
First Mortgage [Member] | Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale, nonrecurring measurements	13,467		13,160		13,467		13,160
First Mortgage [Member] | Fair Value Inputs Level1 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale, nonrecurring measurements	0		0		0		0
Small Business Administrations [Member]
Fair Value Of Assets And Liabilities [Line Items]
Net gains/(losses), Loans held for sale	0		0		15		(2)
Small Business Administrations [Member] | Fair Value Inputs Level2 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale, nonrecurring measurements	37,429		46,592		37,429		46,592
Small Business Administrations [Member] | Fair Value Inputs Level3 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale, nonrecurring measurements	0		0		0		0
Small Business Administrations [Member] | Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale, nonrecurring measurements	37,429		46,592		37,429		46,592
Small Business Administrations [Member] | Fair Value Inputs Level1 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale, nonrecurring measurements	$ 0		$ 0		$ 0		$ 0

[1] Represents carrying value of loans for which adjustments are 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.

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