Fair Value Of Assets And Liabilities (Nonrecurring Fair Value Measurements) (Details) - USD ($)		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale		$ 26,287,000	$ 26,700,000
Loans, net of unearned income	[1]	17,574,994,000	16,732,123,000	$ 17,686,502,000
Real estate acquired by foreclosure	[2]	24,521,000	39,776,000	$ 33,063,000
Other assets		196,595,000	176,935,000
Net gains/(losses), Loans, net of unearned income	[3]	(4,672,000)	(1,362,000)
Net gains/(losses), Real estate acquired by foreclosure	[4]	(536,000)	(376,000)
Net gains/(losses), Other assets	[5]	(706,000)	(395,000)
Gain (loss) on financial assets measured on non-recurring basis		(5,909,000)	(2,092,000)
Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans, net of unearned income	[3]	33,238,000	40,386,000
Real estate acquired by foreclosure	[4]	17,460,000	29,681,000
Other assets	[5]	24,231,000	28,265,000
Fair Value Inputs Level1 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale		0	0
Other assets		43,888,000	33,350,000
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
Real estate acquired by foreclosure	[4]	0	0
Other assets	[5]	0	0
Fair Value Inputs Level2 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale		0	0
Other assets		150,982,000	141,243,000
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
Real estate acquired by foreclosure	[4]	0	0
Other assets	[5]	0	0
Fair Value Inputs Level3 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale		26,287,000	26,700,000
Other assets		1,725,000	2,342,000
Fair Value Inputs Level3 [Member] | Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans, net of unearned income	[3]	33,238,000	40,386,000
Real estate acquired by foreclosure	[4]	17,460,000	29,681,000
Other assets	[5]	24,231,000	28,265,000
First Mortgage [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale		726,000	858,000
Net gains/(losses), Loans held for sale		5,000	38,000
First Mortgage [Member] | Fair Value Inputs Level1 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale		0	0
First Mortgage [Member] | Fair Value Inputs Level2 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale		0	0
First Mortgage [Member] | Fair Value Inputs Level3 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale		$ 726,000	858,000
Small Business Administrations [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale			3,211,000
Net gains/(losses), Loans held for sale			3,000
Small Business Administrations [Member] | Fair Value Inputs Level1 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale			0
Small Business Administrations [Member] | Fair Value Inputs Level2 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale			3,211,000
Small Business Administrations [Member] | Fair Value Inputs Level3 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale			$ 0

[1] March 31, 2016 and 2015 and December 31, 2015 include $31.2 million , $28.0 million and $29.7 million, respectively, of held-to-maturity consumer mortgage loans secured by residential real estate properties in process of foreclosure.

[2] March 31, 2016 and 2015 an d December 31, 2015 include $11.7 million , $17.5 million and $14.6 million, respectively, 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 less estimated costs to sell. Write-downs on these loans are recognized as part of provision for loan losses.

[4] 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.

[5] Represents tax credit investments account ed for under the equity method .