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Investment Securities (Schedule Of Amortized Cost And Fair Value By Contractual Maturity) (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2014 | Dec. 31, 2013 | Mar. 31, 2013
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Schedule of Investments [Line Items] |  |  |  |  |
AFS, Within 1 year, Amortized Cost | $ 39,989 |  |  |  |
AFS, After 1 year; within 5 years, Amortized Cost | 3,578 |  |  |  |
AFS After 5 years; within 10 years, Amortized Cost | 0 |  |  |  |
AFS After 10 years, Amortized Cost | 13,655 |  |  |  |
AFS Subtotal, Amortized Cost | 57,222 |  |  |  |
AFS Within 1 year, Fair Value | 39,990 |  |  |  |
AFS After 1 year; within 5 years, Fair Value | 3,682 |  |  |  |
AFS After 5 years; within 10 years, Fair Value | 0 |  |  |  |
AFS After 10 years, Fair Value | 13,655 |  |  |  |
AFS Subtotal, Fair Value | 57,327 |  |  |  |
Securities available for sale, Amortized Cost | 3,574,144 | [1] |  | 3,110,692 | [2]
Securities available-for-sale | 3,571,179 | [1] | 3,398,457 | 3,190,219 | [2]
HTM, Within 1 year, Amortized Cost | 0 |  |  |  |
HTM, After 1 year; within 5 years, Amortized Cost | 0 |  |  |  |
HTM, After 5 years; within 10 years, Amortized Cost | 0 |  |  |  |
HTM, After 10 years, Amortized Cost | 4,274 |  |  |  |
HTM Subtotal, Amortized Cost | 4,274 |  |  |  |
HTM, Within 1 year, Fair Value | 0 |  |  |  |
HTM, After 1 year; within 5 years, Fair Value | 0 |  |  |  |
HTM, After 5 years; within 10 years, Fair Value | 0 |  |  |  |
HTM, After 10 years, Fair Value | 5,454 |  |  |  |
HTM Subtotal, Fair Value | 5,454 |  |  |  |
Securities held to maturity, Amortized cost | 4,274 |  | 0 | 0 |
Securities held to maturity, Fair Value | 5,454 |  |  |  |
Government Agency Issued Mbs And Cmo [Member] |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Securities available for sale, Amortized Cost | 3,327,379 |  |  |  |
Securities available-for-sale | 3,324,332 |  |  |  |
Securities held to maturity, Amortized cost | 0 |  |  |  |
Securities held to maturity, Fair Value | 0 |  |  |  |
Equity And Other Debt Securities [Member] |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Securities available for sale, Amortized Cost | 189,543 | [3] |  | 216,780 | [4]
Securities available-for-sale | 189,520 | [3] |  | 216,790 | [4]
Securities held to maturity, Amortized cost | 0 |  |  |  |
Securities held to maturity, Fair Value | $ 0 |  |  |  |
[1] | Includes $3.3 billion of securities pledged to secure public deposits, securities sold under agreements to repurchase, and for other purposes.
[2] | Includes $2.9 billion of securities pledged to secure public deposits, securities sold under agreements to repurchase, and for other purposes.
[3] | Includes restricted investments in FHLB-Cincinnati stock of $87.9 million and FRB stock of $66.0 million. The remainder is money market, venture capital, and cost method investments.
[4] | Includes restricted investments in FHLB-Cincinnati stock of $125.5 million and FRB stock of $66.0 million. The remainder is money market, venture capital, and cost method investments.

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- Definition Amount of held-to-maturity debt securities at fair value maturing in the next fiscal year following the latest fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (f)(1) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 + Details
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- Definition Carrying amount of debt securities accounted for as held-to-maturity, net of adjustments including, but not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized, and fair value hedge accounting adjustments, maturing in the next fiscal year following the latest fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (f)(1) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 + Details
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- Definition Fair value of investments in debt securities classified as held-to-maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 + Details
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