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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 | 6 Months Ended
--- | --- | ---
Jun. 30, 2014 SecurityLoan | Jun. 30, 2013 Loans | Jun. 30, 2014 SecurityLoan | Jun. 30, 2013 SecurityLoan
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Loans | 3 | 6 | 6 | 7
Recorded Investment | $ 352 | $ 481 | $ 2,021 | $ 1,755
Real estate loans [Member] | Retail [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Loans |  |  | 1 |
Recorded Investment |  |  | 309 |
Real estate loans [Member] | Hotel/Motel [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Loans |  |  | 1 |
Recorded Investment |  |  | 996 |
Real estate loans [Member] | Gas station [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Loans |  |  |  | 1
Recorded Investment |  |  |  | 1,274
Real estate loans [Member] | Other [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Loans |  | 1 | 1 | 1
Recorded Investment |  | 140 | 364 | 140
Commercial and industrial loans [Member] | Commercial term [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Loans | 2 | 5 | 2 | 5
Recorded Investment | 212 | 341 | 212 | 341
Commercial and industrial loans [Member] | Commercial lines of credit [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Loans | 1 |  | 1 |
Recorded Investment | $ 140 |  | $ 140 |

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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=35738203&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=35738203&loc=SL6953682-111524 + Details
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