Securities - Additional Information (Detail) (USD $)	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Amortized Cost And Fair Value Debt Securities [Abstract]
Unrealized loss, other than temporary securities	$ 0
Tax effect of the proceeds from sale of securities	131	1	622
Pledged of Fair Value of Securities as collateral	168,700,000
Amortization cost of securities as Collateral not Separately Reported	167,300,000
Debt Instrument Repurchase Agreement	140,200,000
Securities Pledged for Federal Home Loan Bank At Fair Value	92,700,000
Securities for Federal Home Loan Bank Not Separately Reported	90,200,000
Securities Pledged For Derivative At Fair Value	12,800,000
Assets Securities Pledged for Derivative Value	12,400,000
Debt Instrument Derivative Swap Agreement	2,800,000
Debt Instrument Federal Home Loan Bank	$ 0

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Available for sale securities gross realized gains losses sale.

+ References

No definition available.

+ Details

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- Definition

Debt instrument derivative swap agreement collateral amount.

+ References

No definition available.

+ Details

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- Definition

Debt instrument federal home loan bank collateral amount.

+ References

No definition available.

+ Details

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- Definition

Debt instrument repurchase agreement collateral amount.

+ References

No definition available.

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- Definition

Pledged assets separately reported securities pledged for derivative at fair value.

+ References

No definition available.

+ Details

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- Definition

Pledged assets separately reported securities pledged for derivative value.

+ References

No definition available.

+ Details

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- Definition

Total of accumulated other comprehensive loss related to that portion of other than temporary impairment (OTTI) due to factors other than credit losses on debt securities categorized either as available-for-sale or held-to-maturity that an entity does not intend to sell and which it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis of the debt security. The amount represented by this item is net of tax, as applicable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 14A

-URI http://asc.fasb.org/extlink&oid=28358780&loc=SL7669686-108580

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- Definition

The fair value, as of the date of each statement of financial position presented, of securities which are owned but transferred to serve as collateral for the payment of the FHLB debt obligations, and that are reclassified and separately reported in the statement of financial position because the transferee has the right by contract or custom to sell or re-pledge them.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 30

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6467456&loc=d3e113888-111728

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- Definition

The fair value, as of the date of each statement of financial position presented, of securities which are owned but transferred to serve as collateral for the payment of repurchase agreements, and that are reclassified and separately reported in the statement of financial position because the transferee has the right by contract or custom to sell or re-pledge them.

+ References

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- Definition

The carrying amount as of the date of the latest financial statement presented of securities which are owned but transferred to serve as collateral for FHLB debt obligations, and for which the transferee does not have the right by contract or custom to sell or re-pledge them to an unrelated party.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 30

-Section 50

-Paragraph 1A

-Subparagraph (b)(1)(i)

-URI http://asc.fasb.org/extlink&oid=7523297&loc=SL6224234-111729

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- Definition

The carrying amount as of the date of the latest financial statement presented of securities which are owned but transferred to serve as collateral for repurchase agreements, and for which the transferee does not have the right by contract or custom to sell or re-pledge them to an unrelated party.

+ References

+ Details

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