Fair Value Of Assets And Liabilities (Nonrecurring Fair Value Measurements) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale, nonrecurring measurements	$ 223,158		$ 222,687
Loans, net of unearned income, nonrecurring measurements	120,938	[1]	211,045	[1]
Real estate acquired by foreclosure, nonrecurring measurements	59,132	[2]	94,416	[2]
Other assets, nonrecurring measurements	86,794	[3]	83,320	[3]
Level 2 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale, nonrecurring measurements	8,555		12,824
Level 3 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale, nonrecurring measurements	214,603		209,863
Loans, net of unearned income, nonrecurring measurements	120,938	[1]	211,045	[1]
Real estate acquired by foreclosure, nonrecurring measurements	59,132	[2]	94,416	[2]
Other assets, nonrecurring measurements	86,794	[3]	83,320	[3]
Net Gains/(Losses) [Member]
Fair Value Of Assets And Liabilities [Line Items]
Net gains/(losses), Loans, net of unearned income	(11,387)	[1]	(12,502)	[1]
Net gains/(losses), Real estate acquired by foreclosure	(5,225)	[2]	(5,039)	[2]
Net gains/(losses), Other assets	(1,986)	[3]	(2,546)	[3]
Gain (loss) on financial assets measured on non-recurring basis	(17,826)		(21,248)
First Mortgages [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale, nonrecurring measurements	11,206		13,459
First Mortgages [Member] | Level 3 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale, nonrecurring measurements	11,206		13,459
First Mortgages [Member] | Net Gains/(Losses) [Member]
Fair Value Of Assets And Liabilities [Line Items]
Net gains/(losses), Loans held for sale - first mortgages	768		(1,161)
SBAs [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale, nonrecurring measurements	73,255		32,367
SBAs [Member] | Level 2 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale, nonrecurring measurements	73,255		32,367
SBAs [Member] | Net Gains/(Losses) [Member]
Fair Value Of Assets And Liabilities [Line Items]
Net gains/(losses), Loans held for sale	$ 4

[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 low income housing investments. 2012 also includes new market tax credit investments.