Fair Value Of Assets And Liabilities (Nonrecurring Fair Value Measurements) (Details) - USD ($)		3 Months Ended			9 Months Ended
		Sep. 30, 2015		Sep. 30, 2014	Sep. 30, 2015		Sep. 30, 2014	Dec. 31, 2014
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale		$ 26,789,000		$ 31,443,000	$ 26,789,000		$ 31,443,000
Loans, net of unearned income		16,725,492,000	[1]	15,812,017,000	16,725,492,000	[1]	15,812,017,000	$ 16,230,166,000
Real estate acquired by foreclosure		35,332,000	[2]	47,996,000	35,332,000	[2]	47,996,000	$ 39,922,000
Other assets		180,513,000		165,523,000	180,513,000		165,523,000
Net gains/(losses), Loans, net of unearned income	[3]	1,195,000		(736,000)	2,729,000		(1,064,000)
Net gains/(losses), Real estate acquired by foreclosure	[4]	(706,000)		(707,000)	(2,366,000)		(2,098,000)
Net gains/(losses), Other assets	[5]	(439,000)		(311,000)	(1,383,000)		(1,498,000)
Gain (loss) on financial assets measured on non-recurring basis		60,000		(2,109,000)	(972,000)		(4,982,000)
Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans, net of unearned income	[3]	27,898,000		46,634,000	27,898,000		46,634,000
Real estate acquired by foreclosure	[4]	25,872,000		35,261,000	25,872,000		35,261,000
Other assets	[5]	27,825,000		29,166,000	27,825,000		29,166,000
Fair Value Inputs Level2 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale		0		0	0		0
Other assets		136,213,000		134,561,000	136,213,000		134,561,000
Fair Value Inputs Level2 [Member] | Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans, net of unearned income	[3]	0		0	0		0
Real estate acquired by foreclosure	[4]	0		0	0		0
Other assets	[5]	0		0	0		0
Fair Value Inputs Level3 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale		26,789,000		31,443,000	26,789,000		31,443,000
Other assets		1,993,000		2,880,000	1,993,000		2,880,000
Fair Value Inputs Level3 [Member] | Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans, net of unearned income	[3]	27,898,000		46,634,000	27,898,000		46,634,000
Real estate acquired by foreclosure	[4]	25,872,000		35,261,000	25,872,000		35,261,000
Other assets	[5]	27,825,000		29,166,000	27,825,000		29,166,000
Fair Value Inputs Level1 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale		0		0	0		0
Other assets		42,307,000		28,082,000	42,307,000		28,082,000
Fair Value Inputs Level1 [Member] | Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans, net of unearned income	[3]	0		0	0		0
Real estate acquired by foreclosure	[4]	0		0	0		0
Other assets	[5]	0		0	0		0
First Mortgage [Member]
Fair Value Of Assets And Liabilities [Line Items]
Net gains/(losses), Loans held for sale		10,000		(351,000)	48,000		(361,000)
First Mortgage [Member] | Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale		726,000		981,000	726,000		981,000
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		726,000		981,000	726,000		981,000
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] September 30, 2015 includes $30.7 million of held-to-maturity consumer mortgage loans secured by residential real estate in process of foreclosure.

[2] September 30, 2015 includes $ 15.6 million of foreclosed residential real estate.

[3] 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.

[4] Represents the fair value an d 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.

[5] Represents tax credit investments accounted for u nder the equity method .