Fair Value Of Assets And Liabilities (Summary Of Book Value And Estimated Fair Value Of Financial Instruments) (Details) - USD ($)		Mar. 31, 2016		Dec. 31, 2015	Mar. 31, 2015
Assets:
Total loans, net of unearned income and allowance for loan losses		$ 17,370,960,000		$ 17,476,260,000	$ 16,503,795,000
Short-term financial assets:
Interest-bearing cash		951,920,000		602,836,000	438,633,000
Federal funds sold		34,061,000		114,479,000	43,052,000
Securities purchased under agreements to resell		767,483,000		615,773,000	831,541,000
Trading securities		1,226,521,000		881,450,000	1,532,463,000
Loans held-for-sale	[1]	116,270,000		126,342,000	133,958,000
Securities available-for-sale		4,014,405,000	[2]	3,929,846,000	3,672,331,000	[3]
Securities held-to-maturity		14,326,000		14,320,000	4,299,000
Derivative assets		165,007,000		104,365,000	148,153,000
Other assets:
Total other assets		196,595,000			176,935,000
Nonearning assets:
Cash and due from banks		280,625,000		300,811,000	282,800,000
Fixed income receivables		114,854,000		63,660,000	190,662,000
Total assets		26,963,682,000		26,192,637,000	25,713,319,000
Deposits:
Total deposits		20,327,834,000		19,967,478,000	18,638,554,000
Trading liabilities		738,653,000		566,019,000	813,141,000
Short-term financial liabilities:
Federal funds purchased		588,413,000		464,166,000	703,352,000
Securities sold under agreements to repurchase		425,217,000		338,133,000	309,297,000
Other short-term borrowings		96,723,000		137,861,000	158,745,000
Term borrowings:
Total term borrowings		1,323,749,000		1,312,677,000	1,570,646,000
Derivative liabilities		146,297,000		108,339,000	133,273,000
Other noninterest-bearing liabilities:
Fixed income payables		56,399,000		23,072,000	91,176,000
Total liabilities		24,320,734,000		$ 23,553,051,000	23,214,062,000
Carrying Reported Amount Fair Value Disclosure [Member]
Assets:
Total loans, net of unearned income and allowance for loan losses		17,370,960,000			16,503,795,000
Short-term financial assets:
Interest-bearing cash		951,920,000			438,633,000
Federal funds sold		34,061,000			43,052,000
Securities purchased under agreements to resell		767,483,000			831,541,000
Total short-term financial assets		1,753,464,000			1,313,226,000
Trading securities	[4]	1,226,521,000			1,532,463,000
Loans held-for-sale		116,270,000			133,958,000	[4]
Securities available-for-sale	[4]	4,014,405,000	[5]		3,672,331,000	[6]
Securities held-to-maturity		14,326,000			4,299,000
Derivative assets	[4]	165,007,000			148,153,000
Other assets:
Tax credit investments		88,670,000			80,331,000
Deferred compensation assets		29,863,000			26,440,000
Total other assets		118,533,000			106,771,000
Nonearning assets:
Cash and due from banks		280,625,000			282,800,000
Fixed income receivables		114,854,000			190,662,000
Accrued interest receivable		70,849,000			72,716,000
Total nonearning assets		466,328,000			546,178,000
Total assets		25,245,814,000			23,961,174,000
Deposits:
Defined maturity		1,317,431,000			1,210,417,000
Undefined maturity		19,010,403,000			17,428,137,000
Total deposits		20,327,834,000			18,638,554,000
Trading liabilities	[4]	738,653,000			813,141,000
Short-term financial liabilities:
Federal funds purchased		588,413,000			703,352,000
Securities sold under agreements to repurchase		425,217,000			309,297,000
Other short-term borrowings		96,723,000			158,745,000
Total short-term financial liabilities		1,110,353,000			1,171,394,000
Term borrowings:
Real estate investment trust-preferred		45,981,000			45,913,000
Term borrowings - new market tax credit investment		18,000,000			18,000,000
Borrowings secured by residential real estate		34,914,000			60,914,000
Other long term borrowings		1,224,854,000			1,445,819,000
Total term borrowings		1,323,749,000			1,570,646,000
Derivative liabilities	[4]	146,297,000			133,273,000
Other noninterest-bearing liabilities:
Fixed income payables		56,399,000			91,176,000
Accrued interest payable		25,077,000			31,745,000
Total other noninterest-bearing liabilities		81,476,000			122,921,000
Total liabilities		23,728,362,000			22,449,929,000
Carrying Reported Amount Fair Value Disclosure [Member] | Commercial Financial And Industrial Portfolio Segment [Member]
Assets:
Total loans, net of unearned income and allowance for loan losses		10,158,296,000			9,570,703,000
Carrying Reported Amount Fair Value Disclosure [Member] | Commercial Real Estate Portfolio Segment [Member]
Assets:
Total loans, net of unearned income and allowance for loan losses		1,822,943,000			1,303,232,000
Carrying Reported Amount Fair Value Disclosure [Member] | Consumer Real Estate Portfolio Segment [Member]
Assets:
Total loans, net of unearned income and allowance for loan losses		4,622,909,000			4,813,572,000
Carrying Reported Amount Fair Value Disclosure [Member] | Permanent Mortgage Portfolio Segment [Member]
Assets:
Total loans, net of unearned income and allowance for loan losses		424,037,000			491,522,000
Carrying Reported Amount Fair Value Disclosure [Member] | Credit Card And Other Portfolio Segment [Member]
Assets:
Total loans, net of unearned income and allowance for loan losses		342,775,000			324,766,000
Estimate Of Fair Value Fair Value Disclosure [Member]
Assets:
Total loans, net of unearned income and allowance for loan losses		17,099,323,000			16,234,532,000
Short-term financial assets:
Interest-bearing cash		951,920,000			438,633,000
Federal funds sold		34,061,000			43,052,000
Securities purchased under agreements to resell		767,483,000			831,541,000
Total short-term financial assets		1,753,464,000			1,313,226,000
Trading securities	[4]	1,226,521,000			1,532,463,000
Loans held-for-sale		116,270,000			133,958,000	[4]
Securities available-for-sale	[4]	4,014,405,000	[5]		3,672,331,000	[6]
Securities held-to-maturity		15,021,000			5,451,000
Derivative assets	[4]	165,007,000			148,153,000
Other assets:
Tax credit investments		81,672,000			62,768,000
Deferred compensation assets		29,863,000			26,440,000
Total other assets		111,535,000			89,208,000
Nonearning assets:
Cash and due from banks		280,625,000			282,800,000
Fixed income receivables		114,854,000			190,662,000
Accrued interest receivable		70,849,000			72,716,000
Total nonearning assets		466,328,000			546,178,000
Total assets		24,967,874,000			23,675,500,000
Deposits:
Defined maturity		1,326,095,000			1,216,398,000
Undefined maturity		19,010,403,000			17,428,137,000
Total deposits		20,336,498,000			18,644,535,000
Trading liabilities	[4]	738,653,000			813,141,000
Short-term financial liabilities:
Federal funds purchased		588,413,000			703,352,000
Securities sold under agreements to repurchase		425,217,000			309,297,000
Other short-term borrowings		96,723,000			158,745,000
Total short-term financial liabilities		1,110,353,000			1,171,394,000
Term borrowings:
Real estate investment trust-preferred		49,350,000			49,350,000
Term borrowings - new market tax credit investment		18,234,000			18,208,000
Borrowings secured by residential real estate		30,131,000			52,568,000
Other long term borrowings		1,199,592,000			1,426,924,000
Total term borrowings		1,297,307,000			1,547,050,000
Derivative liabilities	[4]	146,297,000			133,273,000
Other noninterest-bearing liabilities:
Fixed income payables		56,399,000			91,176,000
Accrued interest payable		25,077,000			31,745,000
Total other noninterest-bearing liabilities		81,476,000			122,921,000
Total liabilities		23,710,584,000			22,432,314,000
Loan commitments		2,279,000			2,439,000
Standby and other commitments		3,885,000			5,229,000
Estimate Of Fair Value Fair Value Disclosure [Member] | Commercial Financial And Industrial Portfolio Segment [Member]
Assets:
Total loans, net of unearned income and allowance for loan losses		10,051,987,000			9,523,767,000
Estimate Of Fair Value Fair Value Disclosure [Member] | Commercial Real Estate Portfolio Segment [Member]
Assets:
Total loans, net of unearned income and allowance for loan losses		1,797,610,000			1,285,775,000
Estimate Of Fair Value Fair Value Disclosure [Member] | Consumer Real Estate Portfolio Segment [Member]
Assets:
Total loans, net of unearned income and allowance for loan losses		4,512,005,000			4,640,351,000
Estimate Of Fair Value Fair Value Disclosure [Member] | Permanent Mortgage Portfolio Segment [Member]
Assets:
Total loans, net of unearned income and allowance for loan losses		392,985,000			458,133,000
Estimate Of Fair Value Fair Value Disclosure [Member] | Credit Card And Other Portfolio Segment [Member]
Assets:
Total loans, net of unearned income and allowance for loan losses		344,736,000			326,506,000
Contractual Amount [Member]
Other noninterest-bearing liabilities:
Loan commitments		8,042,286,000			7,073,470,000
Standby and other commitments		273,666,000			374,173,000
Fair Value Inputs Level1 [Member]
Short-term financial assets:
Securities available-for-sale		25,309,000			25,870,000
Other assets:
Total other assets		43,888,000			33,350,000
Fair Value Inputs Level1 [Member] | Estimate Of Fair Value Fair Value Disclosure [Member]
Assets:
Total loans, net of unearned income and allowance for loan losses		0			0
Short-term financial assets:
Interest-bearing cash		951,920,000			438,633,000
Federal funds sold		0			0
Securities purchased under agreements to resell		0			0
Total short-term financial assets		951,920,000			438,633,000
Trading securities	[4]	0			0
Loans held-for-sale		0			0	[4]
Securities available-for-sale	[4]	25,309,000	[5]		25,870,000	[6]
Securities held-to-maturity		0			0
Derivative assets	[4]	14,025,000			6,910,000
Other assets:
Tax credit investments		0			0
Deferred compensation assets		29,863,000			26,440,000
Total other assets		29,863,000			26,440,000
Nonearning assets:
Cash and due from banks		280,625,000			282,800,000
Fixed income receivables		0			0
Accrued interest receivable		0			0
Total nonearning assets		280,625,000			282,800,000
Total assets		1,301,742,000			780,653,000
Deposits:
Defined maturity		0			0
Undefined maturity		0			0
Total deposits		0			0
Trading liabilities	[4]	0			0
Short-term financial liabilities:
Federal funds purchased		0			0
Securities sold under agreements to repurchase		0			0
Other short-term borrowings		0			0
Total short-term financial liabilities		0			0
Term borrowings:
Real estate investment trust-preferred		0			0
Term borrowings - new market tax credit investment		0			0
Borrowings secured by residential real estate		0			0
Other long term borrowings		0			0
Total term borrowings		0			0
Derivative liabilities	[4]	13,229,000			7,828,000
Other noninterest-bearing liabilities:
Fixed income payables		0			0
Accrued interest payable		0			0
Total other noninterest-bearing liabilities		0			0
Total liabilities		13,229,000			7,828,000
Fair Value Inputs Level1 [Member] | Estimate Of Fair Value Fair Value Disclosure [Member] | Commercial Financial And Industrial Portfolio Segment [Member]
Assets:
Total loans, net of unearned income and allowance for loan losses		0			0
Fair Value Inputs Level1 [Member] | Estimate Of Fair Value Fair Value Disclosure [Member] | Commercial Real Estate Portfolio Segment [Member]
Assets:
Total loans, net of unearned income and allowance for loan losses		0			0
Fair Value Inputs Level1 [Member] | Estimate Of Fair Value Fair Value Disclosure [Member] | Consumer Real Estate Portfolio Segment [Member]
Assets:
Total loans, net of unearned income and allowance for loan losses		0			0
Fair Value Inputs Level1 [Member] | Estimate Of Fair Value Fair Value Disclosure [Member] | Permanent Mortgage Portfolio Segment [Member]
Assets:
Total loans, net of unearned income and allowance for loan losses		0			0
Fair Value Inputs Level1 [Member] | Estimate Of Fair Value Fair Value Disclosure [Member] | Credit Card And Other Portfolio Segment [Member]
Assets:
Total loans, net of unearned income and allowance for loan losses		0			0
Fair Value Inputs Level2 [Member]
Short-term financial assets:
Securities available-for-sale		3,825,743,000			3,487,502,000
Other assets:
Total other assets		150,982,000			141,243,000
Fair Value Inputs Level2 [Member] | Estimate Of Fair Value Fair Value Disclosure [Member]
Assets:
Total loans, net of unearned income and allowance for loan losses		0			0
Short-term financial assets:
Interest-bearing cash		0			0
Federal funds sold		34,061,000			43,052,000
Securities purchased under agreements to resell		767,483,000			831,541,000
Total short-term financial assets		801,544,000			874,593,000
Trading securities	[4]	1,223,464,000			1,527,137,000
Loans held-for-sale		0			3,211,000	[4]
Securities available-for-sale	[4]	3,825,743,000	[5]		3,487,502,000	[6]
Securities held-to-maturity		0			0
Derivative assets	[4]	150,982,000			141,243,000
Other assets:
Tax credit investments		0			0
Deferred compensation assets		0			0
Total other assets		0			0
Nonearning assets:
Cash and due from banks		0			0
Fixed income receivables		114,854,000			190,662,000
Accrued interest receivable		70,849,000			72,716,000
Total nonearning assets		185,703,000			263,378,000
Total assets		6,187,436,000			6,297,064,000
Deposits:
Defined maturity		1,326,095,000			1,216,398,000
Undefined maturity		19,010,403,000			17,428,137,000
Total deposits		20,336,498,000			18,644,535,000
Trading liabilities	[4]	738,653,000			813,141,000
Short-term financial liabilities:
Federal funds purchased		588,413,000			703,352,000
Securities sold under agreements to repurchase		425,217,000			309,297,000
Other short-term borrowings		96,723,000			158,745,000
Total short-term financial liabilities		1,110,353,000			1,171,394,000
Term borrowings:
Real estate investment trust-preferred		0			0
Term borrowings - new market tax credit investment		0			0
Borrowings secured by residential real estate		0			0
Other long term borrowings		1,199,592,000			1,426,924,000
Total term borrowings		1,199,592,000			1,426,924,000
Derivative liabilities	[4]	128,448,000			120,440,000
Other noninterest-bearing liabilities:
Fixed income payables		56,399,000			91,176,000
Accrued interest payable		25,077,000			31,745,000
Total other noninterest-bearing liabilities		81,476,000			122,921,000
Total liabilities		23,595,020,000			22,299,355,000
Fair Value Inputs Level2 [Member] | Estimate Of Fair Value Fair Value Disclosure [Member] | Commercial Financial And Industrial Portfolio Segment [Member]
Assets:
Total loans, net of unearned income and allowance for loan losses		0			0
Fair Value Inputs Level2 [Member] | Estimate Of Fair Value Fair Value Disclosure [Member] | Commercial Real Estate Portfolio Segment [Member]
Assets:
Total loans, net of unearned income and allowance for loan losses		0			0
Fair Value Inputs Level2 [Member] | Estimate Of Fair Value Fair Value Disclosure [Member] | Consumer Real Estate Portfolio Segment [Member]
Assets:
Total loans, net of unearned income and allowance for loan losses		0			0
Fair Value Inputs Level2 [Member] | Estimate Of Fair Value Fair Value Disclosure [Member] | Permanent Mortgage Portfolio Segment [Member]
Assets:
Total loans, net of unearned income and allowance for loan losses		0			0
Fair Value Inputs Level2 [Member] | Estimate Of Fair Value Fair Value Disclosure [Member] | Credit Card And Other Portfolio Segment [Member]
Assets:
Total loans, net of unearned income and allowance for loan losses		0			0
Fair Value Inputs Level3 [Member]
Short-term financial assets:
Securities available-for-sale		1,500,000			3,191,000
Other assets:
Total other assets		1,725,000			2,342,000
Fair Value Inputs Level3 [Member] | Estimate Of Fair Value Fair Value Disclosure [Member]
Assets:
Total loans, net of unearned income and allowance for loan losses		17,099,323,000			16,234,532,000
Short-term financial assets:
Interest-bearing cash		0			0
Federal funds sold		0			0
Securities purchased under agreements to resell		0			0
Total short-term financial assets		0			0
Trading securities	[4]	3,057,000			5,326,000
Loans held-for-sale		116,270,000			130,747,000	[4]
Securities available-for-sale	[4]	163,353,000	[5]		158,959,000	[6]
Securities held-to-maturity		15,021,000			5,451,000
Derivative assets	[4]	0			0
Other assets:
Tax credit investments		81,672,000			62,768,000
Deferred compensation assets		0			0
Total other assets		81,672,000			62,768,000
Nonearning assets:
Cash and due from banks		0			0
Fixed income receivables		0			0
Accrued interest receivable		0			0
Total nonearning assets		0			0
Total assets		17,478,696,000			16,597,783,000
Deposits:
Defined maturity		0			0
Undefined maturity		0			0
Total deposits		0			0
Trading liabilities	[4]	0			0
Short-term financial liabilities:
Federal funds purchased		0			0
Securities sold under agreements to repurchase		0			0
Other short-term borrowings		0			0
Total short-term financial liabilities		0			0
Term borrowings:
Real estate investment trust-preferred		49,350,000			49,350,000
Term borrowings - new market tax credit investment		18,234,000			18,208,000
Borrowings secured by residential real estate		30,131,000			52,568,000
Other long term borrowings		0			0
Total term borrowings		97,715,000			120,126,000
Derivative liabilities	[4]	4,620,000			5,005,000
Other noninterest-bearing liabilities:
Fixed income payables		0			0
Accrued interest payable		0			0
Total other noninterest-bearing liabilities		0			0
Total liabilities		102,335,000			125,131,000
Fair Value Inputs Level3 [Member] | Estimate Of Fair Value Fair Value Disclosure [Member] | Commercial Financial And Industrial Portfolio Segment [Member]
Assets:
Total loans, net of unearned income and allowance for loan losses		10,051,987,000			9,523,767,000
Fair Value Inputs Level3 [Member] | Estimate Of Fair Value Fair Value Disclosure [Member] | Commercial Real Estate Portfolio Segment [Member]
Assets:
Total loans, net of unearned income and allowance for loan losses		1,797,610,000			1,285,775,000
Fair Value Inputs Level3 [Member] | Estimate Of Fair Value Fair Value Disclosure [Member] | Consumer Real Estate Portfolio Segment [Member]
Assets:
Total loans, net of unearned income and allowance for loan losses		4,512,005,000			4,640,351,000
Fair Value Inputs Level3 [Member] | Estimate Of Fair Value Fair Value Disclosure [Member] | Permanent Mortgage Portfolio Segment [Member]
Assets:
Total loans, net of unearned income and allowance for loan losses		392,985,000			458,133,000
Fair Value Inputs Level3 [Member] | Estimate Of Fair Value Fair Value Disclosure [Member] | Credit Card And Other Portfolio Segment [Member]
Assets:
Total loans, net of unearned income and allowance for loan losses		344,736,000			326,506,000
FHLB-Cincinnati Stock [Member] | Fair Value Inputs Level3 [Member]
Other noninterest-bearing liabilities:
Restricted investments		87,900,000			87,900,000
FRB Stock [Member] | Fair Value Inputs Level3 [Member]
Other noninterest-bearing liabilities:
Restricted investments		$ 68,600,000			$ 66,000,000

[1] March 31, 2016 and 2015 an d December 31, 2015 include $22.0 million , $23.8 million and $22.4 million, respectively, of held-for-sale consumer mortgage loans secured by residential re al estate in process of foreclosure.

[2] Includes $ 3 .1 billion of securities pledged to secure public deposits, securities sold under agreements to repurchase, and for other purposes.

[3] Includes $ 3.2 billion of securities pledged to secure public deposits, securities sold under agreements to repu rchase, and for other purposes .

[4] Classes are detailed in the recurring and nonrecurring measurement tables.

[5] Level 3 includes restricted investments in FHLB-Cincinnati stock of $ 87.9 million and FRB stock of $ 68.6 million .

[6] Level 3 includes restricted investments in FHLB-Cincinnati stock of $ 87.9 million and FRB stock of $ 66.0 million.