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Allowance For Loan Losses (Rollforward Of The Allowance For Loan Losses By Portfolio Segment) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2014 | Mar. 31, 2013 | Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Beginning Balance | $ 253,809 |  | $ 276,963 |  |  |
Charge-offs | (24,692) |  | (36,100) |  |  |
Recoveries | 8,129 |  | 9,355 |  |  |
Provision for loan losses | 10,000 |  | 15,000 |  |  |
Ending Balance | 247,246 |  | 265,218 |  |  |
Allowance - individually evaluated for impairment | 69,782 |  | 78,867 |  |  |
Allowance - collectively evaluated for impairment | 175,565 |  | 186,351 |  |  |
Allowance - purchased credit impaired loans | 1,899 |  |  |  |  |
Individually evaluated for impairment | 377,861 |  | 441,265 |  |  |
Collectively evaluated for impairment | 14,695,248 |  | 15,448,405 |  |  |
Purchase credit impaired loans - recorded investment | 46,352 |  |  |  |  |
Loans, net of unearned income | 15,119,461 |  | 15,889,670 |  | 15,389,074 |
Commercial Financial And Industrial Portfolio Segment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Beginning Balance | 86,446 |  | 96,191 |  |  |
Charge-offs | (5,807) |  | (4,436) |  |  |
Recoveries | 1,602 |  | 2,496 |  |  |
Provision for loan losses | (9,509) |  | (8,146) |  |  |
Ending Balance | 72,732 |  | 86,105 |  |  |
Allowance - individually evaluated for impairment | 5,187 |  | 15,463 |  |  |
Allowance - collectively evaluated for impairment | 67,477 |  | 70,642 |  |  |
Allowance - purchased credit impaired loans | 68 |  |  |  |  |
Individually evaluated for impairment | 54,968 |  | 111,036 |  |  |
Collectively evaluated for impairment | 7,691,266 |  | 7,980,150 |  |  |
Purchase credit impaired loans - recorded investment | 6,761 |  |  |  |  |
Loans, net of unearned income | 7,752,995 |  | 8,091,186 |  | 7,923,576 |
Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Beginning Balance | 10,603 |  | 19,997 |  |  |
Charge-offs | (627) |  | (1,381) |  |  |
Recoveries | 279 |  | 646 |  |  |
Provision for loan losses | 5,268 |  | (4,124) |  |  |
Ending Balance | 15,523 |  | 15,138 |  |  |
Allowance - individually evaluated for impairment | 1,495 |  | 156 |  |  |
Allowance - collectively evaluated for impairment | 12,207 |  | 14,982 |  |  |
Allowance - purchased credit impaired loans | 1,821 |  |  |  |  |
Individually evaluated for impairment | 26,701 |  | 43,501 |  |  |
Collectively evaluated for impairment | 1,086,829 |  | 1,072,378 |  |  |
Purchase credit impaired loans - recorded investment | 38,888 |  |  |  |  |
Loans, net of unearned income | 1,152,418 |  | 1,115,879 |  | 1,133,279 |
Consumer Real Estate Portfolio Segment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Beginning Balance | 126,785 |  | 128,949 |  |  |
Charge-offs | (12,264) |  | (23,996) |  |  |
Recoveries | 4,974 |  | 5,504 |  |  |
Provision for loan losses | 3,914 |  | 20,960 |  |  |
Ending Balance | 123,409 |  | 131,417 |  |  |
Allowance - individually evaluated for impairment | 43,653 |  | 40,778 |  |  |
Allowance - collectively evaluated for impairment | 79,746 |  | 90,639 |  |  |
Allowance - purchased credit impaired loans | 10 |  |  |  |  |
Individually evaluated for impairment | 173,577 |  | 165,927 |  |  |
Collectively evaluated for impairment | 5,083,734 |  | 5,424,253 |  |  |
Purchase credit impaired loans - recorded investment | 703 |  |  |  |  |
Loans, net of unearned income | 5,258,014 | [1] | 5,590,180 | [1] | 5,333,371 | [1]
Permanent Mortgage Portfolio Segment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Beginning Balance | 22,491 |  | 24,928 |  |  |
Charge-offs | (2,218) |  | (3,387) |  |  |
Recoveries | 578 |  | 144 |  |  |
Provision for loan losses | 1,670 |  | 3,763 |  |  |
Ending Balance | 22,521 |  | 25,448 |  |  |
Allowance - individually evaluated for impairment | 19,211 |  | 22,239 |  |  |
Allowance - collectively evaluated for impairment | 3,310 |  | 3,209 |  |  |
Allowance - purchased credit impaired loans | 0 |  |  |  |  |
Individually evaluated for impairment | 121,843 |  | 120,054 |  |  |
Collectively evaluated for impairment | 500,399 |  | 673,228 |  |  |
Purchase credit impaired loans - recorded investment | 0 |  |  |  |  |
Loans, net of unearned income | 622,242 | [2] | 793,282 | [2] | 662,242 | [2]
Credit Card And Other Portfolio Segment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Beginning Balance | 7,484 |  | 6,898 |  |  |
Charge-offs | (3,776) |  | (2,900) |  |  |
Recoveries | 696 |  | 565 |  |  |
Provision for loan losses | 8,657 |  | 2,547 |  |  |
Ending Balance | 13,061 |  | 7,110 |  |  |
Allowance - individually evaluated for impairment | 236 |  | 231 |  |  |
Allowance - collectively evaluated for impairment | 12,825 |  | 6,879 |  |  |
Allowance - purchased credit impaired loans | 0 |  |  |  |  |
Individually evaluated for impairment | 772 |  | 747 |  |  |
Collectively evaluated for impairment | 333,020 |  | 298,396 |  |  |
Purchase credit impaired loans - recorded investment | 0 |  |  |  |  |
Loans, net of unearned income | $ 333,792 |  | $ 299,143 |  | $ 336,606 |
[1] | Balances as of March 31, 2014 and 2013, and December 31, 2013 include $86.7 million, $386.4 million, and $333.8 million of restricted and secured real estate loans, respectively. See Note 14 - Variable Interest Entities for additional information.
[2] | Balances as of March 31, 2013, and December 31, 2013 include $13.0 million and $11.2 million of restricted and secured real estate loans, respectively. See Note 14 - Variable Interest Entities for additional information.

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- Definition The recorded balance for loans not accounted for debt securities with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + References No definition available. + Details
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- Definition Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 + Details
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- Definition Reserve for loans impairments recorded after acquisition as a result of current information and events which result in it being probable that estimated cash flows will be less than previously expected or because actual cash flows are less than cash flows previously expected. This relates to loans not accounted for as debt securities, with evidence of deterioration of credit quality since origination that was acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27045933&loc=d3e13503-111538 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
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- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524 + Details
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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524 + Details
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- Definition Amount of recovery of financing receivables doubtful of collection that were previously charged off. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524 + Details
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- Definition The balance of financing receivables that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524 + Details
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- Definition The balance of financing receivables that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524 + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section L -Subsection 1 + Details
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- Definition Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5074-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522 + Details
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