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Allowance for Loan Losses - Information Regarding Loans Modified under TDR (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 Contract | Dec. 31, 2012 Contracts | Dec. 31, 2011 Contracts
Financing Receivable, Modifications [Line Items] |  |  |
Number of Contracts | 0 | 2 | 19
Pre-modification outstanding recorded investment |  | $ 2,609 | $ 16,197
Post-modification outstanding recorded investment |  | 2,609 | 15,879
Real Estate Loans [Member] | Construction [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Contracts |  |  | 1
Pre-modification outstanding recorded investment |  |  | 701
Post-modification outstanding recorded investment |  |  | 357
Real Estate Loans [Member] | Secured by 1-4 Family Residential [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Contracts |  | 1 | 4
Pre-modification outstanding recorded investment |  | 183 | 2,667
Post-modification outstanding recorded investment |  | 183 | 2,667
Real Estate Loans [Member] | Other Real Estate Loans [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Contracts |  | 1 | 14
Pre-modification outstanding recorded investment |  | 2,426 | 12,829
Post-modification outstanding recorded investment |  | 2,426 | 12,855
Commercial and Industrial [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Contracts |  |  |
Pre-modification outstanding recorded investment |  |  |
Post-modification outstanding recorded investment |  |  |
Consumer and Other Loans [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Contracts |  |  |
Pre-modification outstanding recorded investment |  |  |
Post-modification outstanding recorded investment |  |  |

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- Definition Number of 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 33 -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953676-111524 + Details
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- Definition Post-modification amount of investment in financing receivables 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 33 -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953676-111524 + Details
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- Definition Pre-modification amount of investment in financing receivables 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 33 -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953676-111524 + Details
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