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Loans - Troubled Debt Restructurings that Defaulted Subsequent to Modifications Occurring Within Previous Twelve Months, Disaggregated by Loan Class (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2014 SecurityLoan | Mar. 31, 2013 SecurityLoan
Financing Receivable, Modifications [Line Items] |  |
Number of Loans | 7 | 10
Recorded Investment | $ 2,080 | $ 2,256
Real estate loans [Member] | Retail [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Loans | 1 |
Recorded Investment | 310 |
Real estate loans [Member] | Hotel/Motel [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Loans | 1 |
Recorded Investment | 1,000 |
Real estate loans [Member] | Gas station [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Loans | 1 | 1
Recorded Investment | 87 | 1,306
Real estate loans [Member] | Other [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Loans | 2 |
Recorded Investment | 481 |
Commercial and industrial loans [Member] | Commercial term [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Loans | 1 | 8
Recorded Investment | 53 | 762
Commercial and industrial loans [Member] | Commercial lines of credit [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Loans |  | 1
Recorded Investment |  | 188
Consumer loans [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Loans | 1 |
Recorded Investment | $ 149 |

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- Definition Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953682-111524 + Details
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- Definition Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953682-111524 + Details
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