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Loans - Non-Accrual Loans, Segregated by Class of Loans (Detail) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2013 | Dec. 31, 2012
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Non Accrual Loans Segregated By Class Of Loans [Line Items] |  |
Non-accrual loans | $ 86,714 | $ 89,744
Commercial and industrial, Energy [Member] |  |
Non Accrual Loans Segregated By Class Of Loans [Line Items] |  |
Non-accrual loans | 228 | 1,150
Commercial and industrial, Other commercial [Member] |  |
Non Accrual Loans Segregated By Class Of Loans [Line Items] |  |
Non-accrual loans | 40,790 | 45,158
Commercial real estate, Buildings, land and other [Member] |  |
Non Accrual Loans Segregated By Class Of Loans [Line Items] |  |
Non-accrual loans | 41,615 | 38,631
Commercial real estate, Construction [Member] |  |
Non Accrual Loans Segregated By Class Of Loans [Line Items] |  |
Non-accrual loans | 1,015 | 1,100
Consumer Real Estate [Member] |  |
Non Accrual Loans Segregated By Class Of Loans [Line Items] |  |
Non-accrual loans | 2,379 | 2,773
Consumer and Other [Member] |  |
Non Accrual Loans Segregated By Class Of Loans [Line Items] |  |
Non-accrual loans | $ 687 | $ 932

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- Details
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- Definition Reflects the carrying amount of loans deemed to be questionable as to collection on which no interest is continuing to be recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5111-111524 + Details
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