Loans (Schedule Of Loans By Portfolio Segment) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014		Mar. 31, 2014	Dec. 31, 2013		Jun. 30, 2013		Mar. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 15,795,709			$ 15,389,074		$ 16,197,952	[1]
Allowance for loan losses	243,628		247,246	253,809		261,934		265,218	276,963
Total net loans	15,552,081			15,135,265		15,936,018	[1]
Commercial Financial And Industrial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	8,402,836			7,923,576		8,368,067	[2]
Allowance for loan losses	68,591		72,732	86,446		93,502		86,105	96,191
Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,231,513			1,133,279		1,218,206
Allowance for loan losses	15,821		15,523	10,603		13,931		15,138	19,997
Consumer Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	5,218,930	[3]		5,333,371	[3]	5,549,440	[3]
Allowance for loan losses	118,037		123,409	126,785		120,848		131,417	128,949
Permanent Mortgage Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	594,001			662,242	[4]	746,154	[4]
Allowance for loan losses	23,727		22,521	22,491		27,103		25,448	24,928
Credit Card And Other Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	348,429			336,606		316,085
Allowance for loan losses	17,452		13,061	7,484		6,550		7,110	6,898
Restricted And Secured Consumer Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	84,400			333,800		367,000
Restricted And Secured Permanent Mortgage Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income				$ 11,200		$ 12,400

[1] June 30, 2013 balance has been re-presented due to purchase accounting adjustments made in third quarter 2013.

[2] Balance as of June 30, 2013 has been re-presented due to purchase accounting adjustments made in third quarter 2013.

[3] Balances as of June 30, 2014 and 2013, and December 31, 2013 include $84.4 million, $367.0 million, and $333.8 million of restricted and secured real estate loans, respectively. See Note 14 - Variable Interest Entities for additional information.

[4] Balances as of June 30, 2013, and December 31, 2013 include $12.4 million and $11.2 million of restricted and secured real estate loans, respectively. See Note 14 - Variable Interest Entities for additional information.