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Loans - Loans by Class Modified as Troubled Debt Restructurings (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 Loans | Dec. 31, 2012 Loans
Financing Receivable, Modifications [Line Items] |  |
Number of Loans | 12 | 10
Trouble Debt Restructuring [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Loans | 3 | 7
Pre-Modification Outstanding Recorded Investment | $ 3,747 | $ 4,172
Post-Modification Outstanding Recorded Investment | 3,681 | 4,172
Commercial, Industrial, and Agricultural [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Loans | 2 | 2
Commercial, Industrial, and Agricultural [Member] | Trouble Debt Restructuring [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Loans | 0 | 2
Pre-Modification Outstanding Recorded Investment | 0 | 1,455
Post-Modification Outstanding Recorded Investment | 0 | 1,455
Commercial Mortgages [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Loans | 10 | 8
Commercial Mortgages [Member] | Trouble Debt Restructuring [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Loans | 3 | 5
Pre-Modification Outstanding Recorded Investment | 3,747 | 2,717
Post-Modification Outstanding Recorded Investment | 3,681 | 2,717
Residential Real Estate [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Loans | 0 | 0
Residential Real Estate [Member] | Trouble Debt Restructuring [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Loans | 0 | 0
Pre-Modification Outstanding Recorded Investment | 0 | 0
Post-Modification Outstanding Recorded Investment | 0 | 0
Consumer [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Loans | 0 | 0
Consumer [Member] | Trouble Debt Restructuring [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Loans | 0 | 0
Pre-Modification Outstanding Recorded Investment | 0 | 0
Post-Modification Outstanding Recorded Investment | 0 | 0
Credit Cards [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Loans | 0 | 0
Credit Cards [Member] | Trouble Debt Restructuring [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Loans | 0 | 0
Pre-Modification Outstanding Recorded Investment | 0 | 0
Post-Modification Outstanding Recorded Investment | $ 0 | $ 0

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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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