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Allowance for Loan and Lease Losses (Allocation of Allowance for Loan and Lease Losses) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended |  | 3 Months Ended | 9 Months Ended |  | 3 Months Ended | 9 Months Ended |  | 3 Months Ended | 9 Months Ended |  | 3 Months Ended | 9 Months Ended |  | 3 Months Ended | 9 Months Ended |  | 3 Months Ended | 9 Months Ended |  | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended |  | 3 Months Ended | 9 Months Ended |  | 3 Months Ended | 9 Months Ended |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 | Sep. 30, 2011 | Dec. 31, 2011 | Sep. 30, 2012 Construction and Land Development - Commercial | Sep. 30, 2011 Construction and Land Development - Commercial | Sep. 30, 2012 Construction and Land Development - Commercial | Sep. 30, 2011 Construction and Land Development - Commercial | Dec. 31, 2011 Construction and Land Development - Commercial | Sep. 30, 2012 Commercial Mortgage | Sep. 30, 2011 Commercial Mortgage | Sep. 30, 2012 Commercial Mortgage | Sep. 30, 2011 Commercial Mortgage | Dec. 31, 2011 Commercial Mortgage | Sep. 30, 2012 Other Commercial Real Estate | Sep. 30, 2011 Other Commercial Real Estate | Sep. 30, 2012 Other Commercial Real Estate | Sep. 30, 2011 Other Commercial Real Estate | Dec. 31, 2011 Other Commercial Real Estate | Sep. 30, 2012 Commercial and Industrial | Sep. 30, 2011 Commercial and Industrial | Sep. 30, 2012 Commercial and Industrial | Sep. 30, 2011 Commercial and Industrial | Dec. 31, 2011 Commercial and Industrial | Sep. 30, 2012 Lease Financing | Sep. 30, 2011 Lease Financing | Sep. 30, 2012 Lease Financing | Sep. 30, 2011 Lease Financing | Dec. 31, 2011 Lease Financing | Sep. 30, 2012 Other | Sep. 30, 2011 Other | Sep. 30, 2012 Other | Sep. 30, 2011 Other | Dec. 31, 2011 Other | Sep. 30, 2012 Revolving Mortgage | Sep. 30, 2012 Revolving Mortgage | Sep. 30, 2012 Residential Mortgage | Sep. 30, 2011 Residential Mortgage | Sep. 30, 2012 Residential Mortgage | Sep. 30, 2011 Residential Mortgage | Dec. 31, 2011 Residential Mortgage | Sep. 30, 2012 Construction and Land Development - Non - Commercial | Sep. 30, 2011 Construction and Land Development - Non - Commercial | Sep. 30, 2012 Construction and Land Development - Non - Commercial | Sep. 30, 2011 Construction and Land Development - Non - Commercial | Dec. 31, 2011 Construction and Land Development - Non - Commercial | Sep. 30, 2012 Consumer | Sep. 30, 2011 Consumer | Sep. 30, 2012 Consumer | Sep. 30, 2011 Consumer | Dec. 31, 2011 Consumer | Sep. 30, 2012 With A Recorded Allowance | Dec. 31, 2011 With A Recorded Allowance | Sep. 30, 2011 With A Recorded Allowance | Sep. 30, 2012 With A Recorded Allowance Construction and Land Development - Commercial | Dec. 31, 2011 With A Recorded Allowance Construction and Land Development - Commercial | Sep. 30, 2011 With A Recorded Allowance Construction and Land Development - Commercial | Sep. 30, 2012 With A Recorded Allowance Commercial Mortgage | Dec. 31, 2011 With A Recorded Allowance Commercial Mortgage | Sep. 30, 2011 With A Recorded Allowance Commercial Mortgage | Sep. 30, 2012 With A Recorded Allowance Other Commercial Real Estate | Dec. 31, 2011 With A Recorded Allowance Other Commercial Real Estate | Sep. 30, 2011 With A Recorded Allowance Other Commercial Real Estate | Sep. 30, 2012 With A Recorded Allowance Commercial and Industrial | Dec. 31, 2011 With A Recorded Allowance Commercial and Industrial | Sep. 30, 2011 With A Recorded Allowance Commercial and Industrial | Sep. 30, 2012 With A Recorded Allowance Lease Financing | Dec. 31, 2011 With A Recorded Allowance Lease Financing | Sep. 30, 2011 With A Recorded Allowance Lease Financing | Sep. 30, 2012 With A Recorded Allowance Other | Dec. 31, 2011 With A Recorded Allowance Other | Sep. 30, 2011 With A Recorded Allowance Other | Sep. 30, 2012 With A Recorded Allowance Revolving Mortgage | Sep. 30, 2012 With A Recorded Allowance Residential Mortgage | Dec. 31, 2011 With A Recorded Allowance Residential Mortgage | Sep. 30, 2011 With A Recorded Allowance Residential Mortgage | Sep. 30, 2012 With A Recorded Allowance Construction and Land Development - Non - Commercial | Dec. 31, 2011 With A Recorded Allowance Construction and Land Development - Non - Commercial | Sep. 30, 2011 With A Recorded Allowance Construction and Land Development - Non - Commercial | Sep. 30, 2012 With A Recorded Allowance Consumer | Dec. 31, 2011 With A Recorded Allowance Consumer | Sep. 30, 2011 With A Recorded Allowance Consumer | Sep. 30, 2012 With No Recorded Allowance | Dec. 31, 2011 With No Recorded Allowance | Sep. 30, 2011 With No Recorded Allowance | Sep. 30, 2012 With No Recorded Allowance Construction and Land Development - Commercial | Dec. 31, 2011 With No Recorded Allowance Construction and Land Development - Commercial | Sep. 30, 2011 With No Recorded Allowance Construction and Land Development - Commercial | Sep. 30, 2012 With No Recorded Allowance Commercial Mortgage | Dec. 31, 2011 With No Recorded Allowance Commercial Mortgage | Sep. 30, 2011 With No Recorded Allowance Commercial Mortgage | Sep. 30, 2012 With No Recorded Allowance Other Commercial Real Estate | Dec. 31, 2011 With No Recorded Allowance Other Commercial Real Estate | Sep. 30, 2011 With No Recorded Allowance Other Commercial Real Estate | Sep. 30, 2012 With No Recorded Allowance Commercial and Industrial | Dec. 31, 2011 With No Recorded Allowance Commercial and Industrial | Sep. 30, 2011 With No Recorded Allowance Commercial and Industrial | Sep. 30, 2012 With No Recorded Allowance Lease Financing | Dec. 31, 2011 With No Recorded Allowance Lease Financing | Sep. 30, 2011 With No Recorded Allowance Lease Financing | Sep. 30, 2012 With No Recorded Allowance Other | Dec. 31, 2011 With No Recorded Allowance Other | Sep. 30, 2011 With No Recorded Allowance Other | Sep. 30, 2012 With No Recorded Allowance Revolving Mortgage | Sep. 30, 2012 With No Recorded Allowance Residential Mortgage | Dec. 31, 2011 With No Recorded Allowance Residential Mortgage | Sep. 30, 2011 With No Recorded Allowance Residential Mortgage | Sep. 30, 2012 With No Recorded Allowance Construction and Land Development - Non - Commercial | Dec. 31, 2011 With No Recorded Allowance Construction and Land Development - Non - Commercial | Sep. 30, 2011 With No Recorded Allowance Construction and Land Development - Non - Commercial | Sep. 30, 2012 With No Recorded Allowance Consumer | Dec. 31, 2011 With No Recorded Allowance Consumer | Sep. 30, 2011 With No Recorded Allowance Consumer | Sep. 30, 2012 Noncovered Loans | Jun. 30, 2012 Noncovered Loans | Mar. 31, 2012 Noncovered Loans | Sep. 30, 2011 Noncovered Loans | Sep. 30, 2012 Covered Loans With No Recorded Allowance
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total impaired noncovered loans and leases | $ 162,252 | $ 119,599 | $ 162,252 | $ 119,599 | $ 122,135 | $ 23,140 | $ 22,001 | $ 23,140 | $ 22,001 | $ 24,994 | $ 98,575 | $ 66,588 | $ 98,575 | $ 66,588 | $ 65,527 | $ 2,183 | $ 580 | $ 2,183 | $ 580 | $ 2,580 | $ 13,578 | $ 14,222 | $ 13,578 | $ 14,222 | $ 14,268 | $ 685 | $ 339 | $ 685 | $ 339 | $ 322 | $ 729 | $ 0 | $ 729 | $ 0 | $ 0 | $ 3,593 | $ 3,593 | $ 15,617 | $ 12,033 | $ 15,617 | $ 12,033 | $ 9,776 | $ 3,012 | $ 2,844 | $ 3,012 | $ 2,844 | $ 3,676 | $ 1,140 | $ 992 | $ 1,140 | $ 992 | $ 992 | $ 75,976 | $ 102,162 | $ 88,275 | $ 13,305 | $ 24,994 | $ 4,897 | $ 40,140 | $ 53,687 | $ 59,491 | $ 1,383 | $ 1,558 | $ 580 | $ 6,380 | $ 7,157 | $ 7,099 | $ 171 | $ 322 | $ 339 | $ 729 | $ 0 | $ 0 | $ 1,239 | $ 11,078 | $ 9,776 | $ 12,033 | $ 1,311 | $ 3,676 | $ 2,844 | $ 240 | $ 992 | $ 992 | $ 86,276 | $ 19,973 | $ 31,324 | $ 9,835 | $ 0 | $ 17,104 | $ 58,435 | $ 11,840 | $ 7,097 | $ 800 | $ 1,022 | $ 0 | $ 7,198 | $ 7,111 | $ 7,123 | $ 514 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 2,354 | $ 4,539 | $ 0 | $ 0 | $ 1,701 | $ 0 | $ 0 | $ 900 | $ 0 | $ 0 |  |  |  |  |
Unpaid principal balance | 180,892 | 125,078 | 180,892 | 125,078 | 131,731 | 39,181 | 27,162 | 39,181 | 27,162 | 30,756 | 100,477 | 66,906 | 100,477 | 66,906 | 66,463 | 2,183 | 580 | 2,183 | 580 | 322 | 13,638 | 14,222 | 13,638 | 14,222 | 12,674 | 685 | 339 | 685 | 339 | 992 | 729 | 0 | 729 | 0 | 0 | 3,593 | 3,593 | 16,254 | 12,033 | 16,254 | 12,033 | 2,580 | 3,012 | 2,844 | 3,012 | 2,844 | 14,268 | 1,140 | 992 | 1,140 | 992 | 3,676 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related allowance recorded |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 15,903 | 6,122 | 6,614 | 2,912 | 1,027 | 310 | 9,639 | 3,813 | 4,641 | 207 | 114 | 43 | 1,606 | 549 | 433 | 198 | 16 | 25 | 59 | 0 | 0 | 1 | 905 | 411 | 1,025 | 298 | 145 | 92 | 78 | 47 | 45 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average balance | 166,518 | 123,805 | 152,660 | 119,034 |  | 24,046 | 24,311 | 24,595 | 27,151 |  | 100,751 | 68,436 | 90,544 | 66,110 |  | 2,191 | 1,175 | 2,502 | 1,065 |  | 13,414 | 14,142 | 11,847 | 12,741 |  | 689 | 478 | 412 | 653 |  | 734 | 0 | 327 | 38 |  | 3,592 | 2,507 | 16,111 | 11,567 | 15,278 | 9,121 |  | 3,012 | 2,703 | 3,017 | 1,608 |  | 1,978 | 993 | 1,631 | 547 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest income recognized | 2,067 | 594 | 5,885 | 2,267 |  | 239 | 5 | 756 | 109 |  | 1,332 | 297 | 3,621 | 1,375 |  | 33 | 0 | 83 | 25 |  | 186 | 149 | 682 | 372 |  | 11 | 3 | 22 | 15 |  | 0 | 0 | 0 | 0 |  | 20 | 40 | 206 | 100 | 536 | 276 |  | 33 | 38 | 122 | 83 |  | 7 | 2 | 23 | 12 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Troubled debt restructurings | 298,495 | 277,699 | 298,495 | 277,699 | 323,061 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 29,245 |  |  | 42,246 |
Amount of individual loan impairment analysis in estimation methodology |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 75,579 |  |  |
Threshold amount for individual impairment analysis |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 500 |  | 1,000 |  |
Loans with an adverse change in expected cash flows |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 766,627

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- Definition Loans and Leases Receivable, Gross, Carrying Amount with No Adverse Change in Expected Cash Flows + References No definition available. + Details
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- Definition Receivables, Change in Method of Calculating Impairment, Recorded Investment + References No definition available. + Details
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- Definition Receivables, Change in Method of Calculating Impairment, Threshold Amount + References No definition available. + Details
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- Details
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- Definition The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953670-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953676-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6951948&loc=d3e18845-111554 + Details
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- Definition The average recorded investment related to impaired financing receivables. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5212-111524 -Subparagraph (c)(1) Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5258-111524 + Details
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- Definition The interest income recognized during the time within that period that the financing receivables were impaired. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5212-111524 -Subparagraph (c)(2) + Details
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Balance Type: | credit
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- Definition The recorded investment related to impaired financing receivables. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953550-111524 -Subparagraph (b) + Details
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- Definition Amount of allowance for credit losses related to recorded investment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5212-111524 -Subparagraph (a)(3) + Details
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- Definition The unpaid principal balance related to impaired financing receivables. + 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)(4) -URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5212-111524 + Details
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