Fair Value Of Assets And Liabilities (Nonrecurring Fair Value Measurements) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale		$ 25,738	$ 26,525	$ 25,738	$ 26,525
Loans, net of unearned income	[1]	18,589,337	16,936,772	18,589,337	16,936,772	$ 17,686,502
Real estate acquired by foreclosure	[2]	20,053	40,268	20,053	40,268	$ 33,063
Other assets		229,616	144,729	229,616	144,729
Net gains/(losses), Loans, net of unearned income	[3]	353	(479)	(4,319)	(1,841)
Net gains/(losses), Real estate acquired by foreclosure	[4]	(314)	(1,284)	(850)	(1,660)
Net gains/(losses), Other assets	[5]	(831)	(549)	(1,537)	(944)
Gain (loss) on financial assets measured on non-recurring basis		(790)	(2,312)	(6,699)	(4,407)
Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans, net of unearned income	[3]	35,314	38,913	35,314	38,913
Real estate acquired by foreclosure	[4]	14,150	29,109	14,150	29,109
Other assets	[5]	28,588	28,265	28,588	28,265
Fair Value Inputs Level1 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale		0	0	0	0
Other assets		52,794	32,640	52,794	32,640
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
Fair Value Inputs Level2 [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale		0	0	0	0
Other assets		175,416	109,931	175,416	109,931
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		25,738	26,525	25,738	26,525
Other assets		1,406	2,158	1,406	2,158
Fair Value Inputs Level3 [Member] | Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans, net of unearned income	[3]	35,314	38,913	35,314	38,913
Real estate acquired by foreclosure	[4]	14,150	29,109	14,150	29,109
Other assets	[5]	28,588	28,265	28,588	28,265
First Mortgage [Member]
Fair Value Of Assets And Liabilities [Line Items]
Net gains/(losses), Loans held for sale		2	0	7	38
First Mortgage [Member] | Fair Value Measurements Nonrecurring [Member]
Fair Value Of Assets And Liabilities [Line Items]
Loans held-for-sale		721	849	721	849
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
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		$ 721	$ 849	$ 721	$ 849

[1] June 30 , 2016 and 2015 and December 31, 2015 include $31.1 million, $28.3 million and $29.7 million, respectively, of held-to-maturity consumer mortgage loans secured by residential real estate properties in process of f oreclosure.

[2] June 30 , 2016 and 2015 an d December 31, 2015 include $9.6 million , $ 18.7 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 .