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Fair Value Disclosures - Summary of Additional Qualitative Information (Detail) (Fair Value, Measurements, Nonrecurring [Member], USD $) In Thousands, unless otherwise specified | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2014 | Dec. 31, 2013
Impaired Loans [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Fair Value Estimate | $ 4,795 | $ 4,951
Valuation Techniques | Appraisal of collateral | Appraisal of collateral
Impaired Loans [Member] | Management Adjustments on Appraisals for Property Type and Recent Activity [Member] | Appraisal of Collateral [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Unobservable Input | Management adjustments on appraisals for property type and recent activity | Management adjustments on appraisals for property type and recent activity
Impaired Loans [Member] | Management Adjustments for Liquidation Expenses [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Unobservable Input | Management adjustments for liquidation expenses | Management adjustments for liquidation expenses
Impaired Loans [Member] | Minimum [Member] | Management Adjustments on Appraisals for Property Type and Recent Activity [Member] | Appraisal of Collateral [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Unobservable Input, Discount rate | 0.00% | 0.00%
Impaired Loans [Member] | Minimum [Member] | Management Adjustments for Liquidation Expenses [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Unobservable Input, Discount rate | 5.00% | 5.00%
Impaired Loans [Member] | Maximum [Member] | Management Adjustments on Appraisals for Property Type and Recent Activity [Member] | Appraisal of Collateral [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Unobservable Input, Discount rate | 30.00% | 30.00%
Impaired Loans [Member] | Maximum [Member] | Management Adjustments for Liquidation Expenses [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Unobservable Input, Discount rate | 10.00% | 10.00%
Foreclosed Real Estate [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Fair Value Estimate | $ 718 | $ 558
Valuation Techniques | Appraisal of collateral | Appraisal of collateral
Foreclosed Real Estate [Member] | Management Adjustments on Appraisals for Property Type and Recent Activity [Member] | Appraisal of Collateral [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Unobservable Input | Management adjustments on appraisals for property type and recent activity | Management adjustments on appraisals for property type and recent activity
Foreclosed Real Estate [Member] | Management Adjustments for Liquidation Expenses [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Unobservable Input | Management adjustments for liquidation expenses | Management adjustments for liquidation expenses
Foreclosed Real Estate [Member] | Minimum [Member] | Management Adjustments on Appraisals for Property Type and Recent Activity [Member] | Appraisal of Collateral [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Unobservable Input, Discount rate | 0.00% | 0.00%
Foreclosed Real Estate [Member] | Minimum [Member] | Management Adjustments for Liquidation Expenses [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Unobservable Input, Discount rate | 5.00% | 5.00%
Foreclosed Real Estate [Member] | Maximum [Member] | Management Adjustments on Appraisals for Property Type and Recent Activity [Member] | Appraisal of Collateral [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Unobservable Input, Discount rate | 30.00% | 30.00%
Foreclosed Real Estate [Member] | Maximum [Member] | Management Adjustments for Liquidation Expenses [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Unobservable Input, Discount rate | 25.00% | 10.00%

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- Definition Fair value measurements unobservable input. + References No definition available. + Details
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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Description of the inputs and valuation technique(s) used to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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