Advance from Federal Home Loan Bank - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013
Variable rate advances adjusting daily
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Federal home loan bank advances mature in June 2014	$ 5.5
Residential
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Blanket collateral agreement, carrying value of collateral pledged	74.4
Mutual fund investment
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Blanket collateral agreement, carrying value of collateral pledged	$ 1.6

Amount of the collateral pledged in support of federal home loan bank advances outstanding.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 470

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 470

-Section 50

-Paragraph 3

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant