Fair Value Of Assets And Liabilities (Nonrecurring Fair Value Measurements) (Details) - USD ($)		3 Months Ended			6 Months Ended
		Jun. 30, 2015		Jun. 30, 2014	Jun. 30, 2015		Jun. 30, 2014	Dec. 31, 2014
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale		$ 26,525,000		$ 232,487,000	$ 26,525,000		$ 232,487,000
Loans, net of unearned income		16,936,772,000	[1]	15,795,709,000	16,936,772,000	[1]	15,795,709,000	$ 16,230,166,000
Real estate acquired by foreclosure		40,268,000	[2]	57,552,000	40,268,000	[2]	57,552,000	$ 39,922,000
Other assets		144,729,000		190,124,000	144,729,000		190,124,000
Net gains/(losses), Loans, net of unearned income	[3]	(641,000)		(469,000)	(2,182,000)		(677,000)
Net gains/(losses), Real estate acquired by foreclosure	[4]	(1,284,000)		(533,000)	(1,660,000)		(1,391,000)
Net gains/(losses), Other assets	[5]	(549,000)		(862,000)	(944,000)		(1,187,000)
Gain (loss) on financial assets measured on non-recurring basis		(2,474,000)		(1,856,000)	(4,748,000)		(3,222,000)
Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans, net of unearned income	[3]	38,913,000		53,652,000	38,913,000		53,652,000
Real estate acquired by foreclosure	[4]	29,109,000		38,781,000	29,109,000		38,781,000
Other assets	[5]	28,265,000		29,622,000	28,265,000		29,622,000
Fair Value Inputs Level2 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale		0		0	0		0
Other assets		109,931,000		156,948,000	109,931,000		156,948,000
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		26,525,000		232,487,000	26,525,000		232,487,000
Other assets		2,158,000		3,197,000	2,158,000		3,197,000
Fair Value Inputs Level3 [Member] | Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans, net of unearned income	[3]	38,913,000		53,652,000	38,913,000		53,652,000
Real estate acquired by foreclosure	[4]	29,109,000		38,781,000	29,109,000		38,781,000
Other assets	[5]	28,265,000		29,622,000	28,265,000		29,622,000
Fair Value Inputs Level1 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale		0		0	0		0
Other assets		32,640,000		29,979,000	32,640,000		29,979,000
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		0		7,000	38,000		(10,000)
First Mortgage [Member] | Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale		849,000		9,004,000	849,000		9,004,000
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		849,000		9,004,000	849,000		9,004,000
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				1,000			43,000
Small Business Administrations [Member] | Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale				3,471,000			3,471,000
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				3,471,000			3,471,000
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] June 30, 2015 includes $28.3 million of held-to-maturity consumer mortgage loans secured by residential real estate in process of foreclosure.

[2] June 30, 2015 includes $18.7 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 .