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Fair Value Of Assets And Liabilities (Summary Of Book Value And Estimated Fair Value Of Financial Instruments) (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
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Assets: |  |  |
Total loans, net of unearned income and allowance for loan losses |  | $ 19,971,224 | $ 19,387,452
Short-term financial assets: |  |  |
Interest-bearing cash |  | 604,326 | 1,060,034
Federal funds sold |  | 76,316 | 50,838
Securities purchased under agreements to resell |  | 663,637 | 613,682
Trading securities |  | 1,469,402 | 897,071
Loans held-for-sale | [1] | 339,780 | 111,248
Securities available-for-sale |  | 3,963,138 | 3,943,499
Held-to-maturity Securities |  | 10,000 | 14,347
Derivative assets |  | 80,976 | 121,654
Nonearning assets: |  |  |
Cash and due from banks |  | 347,802 | 373,274
Fixed income receivables |  | 68,750 | 57,411
Total assets |  | 29,622,636 | 28,555,231
Deposits: |  |  |
Total deposits |  | 22,099,254 | 22,672,363
Trading Liabilities |  | 579,028 | 561,848
Short-term financial liabilities: |  |  |
Federal Funds Purchased |  | 292,650 | 414,207
Securities sold under agreements to repurchase |  | 516,867 | 453,053
Other short-term borrowings |  | 1,637,419 | 83,177
Term borrowings: |  |  |
Total term borrowings |  | 1,059,507 | 1,040,656
Derivative liabilities |  | 83,146 | 135,897
Other noninterest-bearing liabilities: |  |  |
Fixed income payables |  | 44,304 | 21,002
Total liabilities |  | 26,739,085 | 25,850,147
Fair Value, Inputs, Level 3 | FHLB-Cincinnati Stock |  |  |
Other noninterest-bearing liabilities: |  |  |
Restricted investments |  | 87,900 | 87,900
Fair Value, Inputs, Level 3 | FRB Stock [Member] |  |  |
Other noninterest-bearing liabilities: |  |  |
Restricted investments |  | 68,600 | 68,600
Reported Value Measurement |  |  |
Assets: |  |  |
Total loans, net of unearned income and allowance for loan losses |  | 19,971,224 | 19,387,452
Short-term financial assets: |  |  |
Interest-bearing cash |  | 604,326 | 1,060,034
Federal funds sold |  | 76,316 | 50,838
Securities purchased under agreements to resell |  | 663,637 | 613,682
Total short-term financial assets |  | 1,344,279 | 1,724,554
Trading securities |  | 1,469,402 | 897,071
Loans held-for-sale |  | 339,780 | 111,248
Securities available-for-sale |  | 3,963,138 | 3,943,499
Held-to-maturity Securities |  | 10,000 | 14,347
Derivative assets |  | 80,976 | 121,654
Other assets: |  |  |
Tax credit investments |  | 120,701 | 100,105
Deferred compensation assets |  | 34,951 | 32,840
Total other assets |  | 155,652 | 132,945
Nonearning assets: |  |  |
Cash and due from banks |  | 347,802 | 373,274
Fixed income receivables |  | 68,750 | 57,411
Accrued interest receivable |  | 70,058 | 62,887
Total nonearning assets |  | 486,610 | 493,572
Total assets |  | 27,821,061 | 26,826,342
Deposits: |  |  |
Defined maturity |  | 1,112,098 | 1,355,133
Undefined maturity |  | 20,987,156 | 21,317,230
Total deposits |  | 22,099,254 | 22,672,363
Trading Liabilities |  | 579,028 | 561,848
Short-term financial liabilities: |  |  |
Federal Funds Purchased |  | 292,650 | 414,207
Securities sold under agreements to repurchase |  | 516,867 | 453,053
Other short-term borrowings |  | 1,637,419 | 83,177
Total short-term financial liabilities |  | 2,446,936 | 950,437
Term borrowings: |  |  |
Real estate investment trust-preferred |  | 46,083 | 46,032
Term borrowings - new market tax credit investment |  | 18,000 | 18,000
Borrowings secured by residential real estate |  | 42,585 | 23,126
Other long term borrowings |  | 952,839 | 953,498
Total term borrowings |  | 1,059,507 | 1,040,656
Derivative liabilities |  | 83,146 | 135,897
Other noninterest-bearing liabilities: |  |  |
Fixed income payables |  | 44,304 | 21,002
Accrued interest payable |  | 19,205 | 10,336
Total other noninterest-bearing liabilities |  | 63,509 | 31,338
Total liabilities |  | 26,331,380 | 25,392,539
Reported Value Measurement | Commercial Financial And Industrial Portfolio Segment |  |  |
Assets: |  |  |
Total loans, net of unearned income and allowance for loan losses |  | 12,693,639 | 12,058,689
Reported Value Measurement | Commercial Real Estate Portfolio Segment |  |  |
Assets: |  |  |
Total loans, net of unearned income and allowance for loan losses |  | 2,221,332 | 2,101,671
Reported Value Measurement | Consumer Real Estate Portfolio Segment |  |  |
Assets: |  |  |
Total loans, net of unearned income and allowance for loan losses |  | 4,328,778 | 4,473,395
Reported Value Measurement | Permanent Mortgage Portfolio Segment |  |  |
Assets: |  |  |
Total loans, net of unearned income and allowance for loan losses |  | 387,363 | 406,836
Reported Value Measurement | Credit Card And Other Portfolio Segment |  |  |
Assets: |  |  |
Total loans, net of unearned income and allowance for loan losses |  | 340,112 | 346,861
Estimate of Fair Value Measurement |  |  |
Assets: |  |  |
Total loans, net of unearned income and allowance for loan losses |  | 19,851,724 | 19,134,856
Short-term financial assets: |  |  |
Interest-bearing cash |  | 604,326 | 1,060,034
Federal funds sold |  | 76,316 | 50,838
Securities purchased under agreements to resell |  | 663,637 | 613,682
Total short-term financial assets |  | 1,344,279 | 1,724,554
Trading securities |  | 1,469,402 | 897,071
Loans held-for-sale |  | 340,441 | 111,248
Securities available-for-sale |  | 3,963,138 | 3,943,499
Held-to-maturity Securities |  | 9,985 | 14,773
Derivative assets |  | 80,976 | 121,654
Other assets: |  |  |
Tax credit investments |  | 121,435 | 98,400
Deferred compensation assets |  | 34,951 | 32,840
Total other assets |  | 156,386 | 131,240
Nonearning assets: |  |  |
Cash and due from banks |  | 347,802 | 373,274
Fixed income receivables |  | 68,750 | 57,411
Accrued interest receivable |  | 70,058 | 62,887
Total nonearning assets |  | 486,610 | 493,572
Total assets |  | 27,702,941 | 26,572,467
Deposits: |  |  |
Defined maturity |  | 1,108,919 | 1,361,104
Undefined maturity |  | 20,987,156 | 21,317,230
Total deposits |  | 22,096,075 | 22,678,334
Trading Liabilities |  | 579,028 | 561,848
Short-term financial liabilities: |  |  |
Federal Funds Purchased |  | 292,650 | 414,207
Securities sold under agreements to repurchase |  | 516,867 | 453,053
Other short-term borrowings |  | 1,637,419 | 83,177
Total short-term financial liabilities |  | 2,446,936 | 950,437
Term borrowings: |  |  |
Real estate investment trust-preferred |  | 49,350 | 49,350
Term borrowings - new market tax credit investment |  | 17,959 | 17,918
Borrowings secured by residential real estate |  | 42,184 | 21,969
Other long term borrowings |  | 968,297 | 965,066
Total term borrowings |  | 1,077,790 | 1,054,303
Derivative liabilities |  | 83,146 | 135,897
Other noninterest-bearing liabilities: |  |  |
Fixed income payables |  | 44,304 | 21,002
Accrued interest payable |  | 19,205 | 10,336
Total other noninterest-bearing liabilities |  | 63,509 | 31,338
Total liabilities |  | 26,346,484 | 25,412,157
Loan commitments |  | 2,388 | 2,924
Standby and other commitments |  | 4,139 | 4,037
Estimate of Fair Value Measurement | Commercial Financial And Industrial Portfolio Segment |  |  |
Assets: |  |  |
Total loans, net of unearned income and allowance for loan losses |  | 12,658,237 | 11,918,374
Estimate of Fair Value Measurement | Commercial Real Estate Portfolio Segment |  |  |
Assets: |  |  |
Total loans, net of unearned income and allowance for loan losses |  | 2,208,208 | 2,078,306
Estimate of Fair Value Measurement | Consumer Real Estate Portfolio Segment |  |  |
Assets: |  |  |
Total loans, net of unearned income and allowance for loan losses |  | 4,252,704 | 4,385,669
Estimate of Fair Value Measurement | Permanent Mortgage Portfolio Segment |  |  |
Assets: |  |  |
Total loans, net of unearned income and allowance for loan losses |  | 392,407 | 404,930
Estimate of Fair Value Measurement | Credit Card And Other Portfolio Segment |  |  |
Assets: |  |  |
Total loans, net of unearned income and allowance for loan losses |  | 340,168 | 347,577
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 1 |  |  |
Assets: |  |  |
Total loans, net of unearned income and allowance for loan losses |  | 0 | 0
Short-term financial assets: |  |  |
Interest-bearing cash |  | 604,326 | 1,060,034
Federal funds sold |  | 0 | 0
Securities purchased under agreements to resell |  | 0 | 0
Total short-term financial assets |  | 604,326 | 1,060,034
Trading securities |  | 0 | 0
Loans held-for-sale |  | 0 | 0
Securities available-for-sale |  | 24,756 | 25,249
Held-to-maturity Securities |  | 0 | 0
Derivative assets |  | 10,003 | 33,587
Other assets: |  |  |
Tax credit investments |  | 0 | 0
Deferred compensation assets |  | 34,951 | 32,840
Total other assets |  | 34,951 | 32,840
Nonearning assets: |  |  |
Cash and due from banks |  | 347,802 | 373,274
Fixed income receivables |  | 0 | 0
Accrued interest receivable |  | 0 | 0
Total nonearning assets |  | 347,802 | 373,274
Total assets |  | 1,021,838 | 1,524,984
Deposits: |  |  |
Defined maturity |  | 0 | 0
Undefined maturity |  | 0 | 0
Total deposits |  | 0 | 0
Trading Liabilities |  | 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 |  | 7,627 | 33,274
Other noninterest-bearing liabilities: |  |  |
Fixed income payables |  | 0 | 0
Accrued interest payable |  | 0 | 0
Total other noninterest-bearing liabilities |  | 0 | 0
Total liabilities |  | 7,627 | 33,274
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 1 | Commercial Financial And Industrial Portfolio Segment |  |  |
Assets: |  |  |
Total loans, net of unearned income and allowance for loan losses |  | 0 | 0
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 1 | Commercial Real Estate Portfolio Segment |  |  |
Assets: |  |  |
Total loans, net of unearned income and allowance for loan losses |  | 0 | 0
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 1 | Consumer Real Estate Portfolio Segment |  |  |
Assets: |  |  |
Total loans, net of unearned income and allowance for loan losses |  | 0 | 0
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 1 | Permanent Mortgage Portfolio Segment |  |  |
Assets: |  |  |
Total loans, net of unearned income and allowance for loan losses |  | 0 | 0
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 1 | Credit Card And Other Portfolio Segment |  |  |
Assets: |  |  |
Total loans, net of unearned income and allowance for loan losses |  | 0 | 0
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 2 |  |  |
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 |  | 76,316 | 50,838
Securities purchased under agreements to resell |  | 663,637 | 613,682
Total short-term financial assets |  | 739,953 | 664,520
Trading securities |  | 1,467,097 | 894,498
Loans held-for-sale |  | 246,441 | 6,631
Securities available-for-sale |  | 3,773,600 | 3,756,745
Held-to-maturity Securities |  | 0 | 0
Derivative assets |  | 70,973 | 88,067
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 |  | 68,750 | 57,411
Accrued interest receivable |  | 70,058 | 62,887
Total nonearning assets |  | 138,808 | 120,298
Total assets |  | 6,436,872 | 5,530,759
Deposits: |  |  |
Defined maturity |  | 1,108,919 | 1,361,104
Undefined maturity |  | 20,987,156 | 21,317,230
Total deposits |  | 22,096,075 | 22,678,334
Trading Liabilities |  | 579,028 | 561,848
Short-term financial liabilities: |  |  |
Federal Funds Purchased |  | 292,650 | 414,207
Securities sold under agreements to repurchase |  | 516,867 | 453,053
Other short-term borrowings |  | 1,637,419 | 83,177
Total short-term financial liabilities |  | 2,446,936 | 950,437
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 |  | 968,297 | 965,066
Total term borrowings |  | 968,297 | 965,066
Derivative liabilities |  | 69,989 | 96,378
Other noninterest-bearing liabilities: |  |  |
Fixed income payables |  | 44,304 | 21,002
Accrued interest payable |  | 19,205 | 10,336
Total other noninterest-bearing liabilities |  | 63,509 | 31,338
Total liabilities |  | 26,223,834 | 25,283,401
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 2 | Commercial Financial And Industrial Portfolio Segment |  |  |
Assets: |  |  |
Total loans, net of unearned income and allowance for loan losses |  | 0 | 0
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 2 | Commercial Real Estate Portfolio Segment |  |  |
Assets: |  |  |
Total loans, net of unearned income and allowance for loan losses |  | 0 | 0
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 2 | Consumer Real Estate Portfolio Segment |  |  |
Assets: |  |  |
Total loans, net of unearned income and allowance for loan losses |  | 0 | 0
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 2 | Permanent Mortgage Portfolio Segment |  |  |
Assets: |  |  |
Total loans, net of unearned income and allowance for loan losses |  | 0 | 0
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 2 | Credit Card And Other Portfolio Segment |  |  |
Assets: |  |  |
Total loans, net of unearned income and allowance for loan losses |  | 0 | 0
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 3 |  |  |
Assets: |  |  |
Total loans, net of unearned income and allowance for loan losses |  | 19,851,724 | 19,134,856
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 |  | 2,305 | 2,573
Loans held-for-sale |  | 94,000 | 104,617
Securities available-for-sale |  | 164,782 | 161,505
Held-to-maturity Securities |  | 9,985 | 14,773
Derivative assets |  | 0 | 0
Other assets: |  |  |
Tax credit investments |  | 121,435 | 98,400
Deferred compensation assets |  | 0 | 0
Total other assets |  | 121,435 | 98,400
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 |  | 20,244,231 | 19,516,724
Deposits: |  |  |
Defined maturity |  | 0 | 0
Undefined maturity |  | 0 | 0
Total deposits |  | 0 | 0
Trading Liabilities |  | 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 | 49,350
Term borrowings - new market tax credit investment |  | 17,959 | 17,918
Borrowings secured by residential real estate |  | 42,184 | 21,969
Other long term borrowings |  | 0 | 0
Total term borrowings |  | 109,493 | 89,237
Derivative liabilities |  | 5,530 | 6,245
Other noninterest-bearing liabilities: |  |  |
Fixed income payables |  | 0 | 0
Accrued interest payable |  | 0 | 0
Total other noninterest-bearing liabilities |  | 0 | 0
Total liabilities |  | 115,023 | 95,482
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 3 | Commercial Financial And Industrial Portfolio Segment |  |  |
Assets: |  |  |
Total loans, net of unearned income and allowance for loan losses |  | 12,658,237 | 11,918,374
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 3 | Commercial Real Estate Portfolio Segment |  |  |
Assets: |  |  |
Total loans, net of unearned income and allowance for loan losses |  | 2,208,208 | 2,078,306
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 3 | Consumer Real Estate Portfolio Segment |  |  |
Assets: |  |  |
Total loans, net of unearned income and allowance for loan losses |  | 4,252,704 | 4,385,669
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 3 | Permanent Mortgage Portfolio Segment |  |  |
Assets: |  |  |
Total loans, net of unearned income and allowance for loan losses |  | 392,407 | 404,930
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 3 | Credit Card And Other Portfolio Segment |  |  |
Assets: |  |  |
Total loans, net of unearned income and allowance for loan losses |  | 340,168 | 347,577
Contractual Amount |  |  |
Other noninterest-bearing liabilities: |  |  |
Loan commitments |  | 8,868,115 | 8,744,649
Standby and other commitments |  | $ 336,953 | $ 277,549
[1] | September 30, 2017 and December 31, 2016 include $12.8 million and $19.3 million, respectively, of held-for-sale consumer mortgage loans secured by residential real estate in process of foreclosure.

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