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Fair Value of Financial Instruments - Summary of Assets and Liabilities Measured at Fair Value Using Significant Unobservable Inputs (Level 3) (Detail) - Non-Recurring Fair Value Measurements [Member] - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2015 | Dec. 31, 2014
Impaired Loans [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Fair Value | $ 3,988 | $ 1,456
Valuation Technique | Multiple data points, including discount to appraised value of collateral based on recent market activity |
Unobservable Input | Appraisal comparability adjustment (discount) |
OREO [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Fair Value | $ 7,168 | $ 7,735
Valuation Technique | Discount to appraised value of property based on recent market activity for sales of similar properties |
Unobservable Input | Appraisal comparability adjustment (discount) |
Minimum [Member] | Impaired Loans [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Quantitative Range of Unobservable Inputs (Weighted-Average) | 9.00% |
Minimum [Member] | OREO [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Quantitative Range of Unobservable Inputs (Weighted-Average) | 9.00% |
Maximum [Member] | Impaired Loans [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Quantitative Range of Unobservable Inputs (Weighted-Average) | 10.00% |
Maximum [Member] | OREO [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Quantitative Range of Unobservable Inputs (Weighted-Average) | 10.00% |
Weighted Average [Member] | Impaired Loans [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Quantitative Range of Unobservable Inputs (Weighted-Average) | (9.00%) |
Weighted Average [Member] | OREO [Member] |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Quantitative Range of Unobservable Inputs (Weighted-Average) | (9.00%) |

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + 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 (a) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Percentage of adjustment to the observed price for a similar asset or liability when an identical transaction does not exist, used as an input 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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- Definition Description of significant assumptions used by management to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13433-108611 + 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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