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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, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	$ 1,983	$ 11,358
Valuation Technique	Multiple data points, including discount to appraised value of collateral based on recent market activity
Foreclosed Property and Other Real Estate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	$ 1,866	$ 5,832
Valuation Technique	Discount to appraised value of property based on recent market activity for sales of similar properties
Minimum [Member] | Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Quantitative Range of Unobservable Inputs (Weighted-Average)	9.00%
Minimum [Member] | Foreclosed Property and Other Real Estate [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] | Foreclosed Property and Other Real Estate [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)	9.50%
Weighted Average [Member] | Foreclosed Property and Other Real Estate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Quantitative Range of Unobservable Inputs (Weighted-Average)	9.50%

X

- 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=25499696&loc=d3e19207-110258

+ Details

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X

- 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=25499696&loc=d3e19207-110258

+ Details

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X

- 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=25499696&loc=d3e19207-110258

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