Deposits - Additional Information (Detail) (USD $)	3 Months Ended
Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Deposits [Abstract]
Large-denomination time deposit	$ 100,000
Time deposits, $100,000 or more, domestic	21,529,000		22,249,000
Time deposits include certificates of deposit, $100,000 or more, domestic, interest expense	$ 71,241	$ 88,723

Amount of interest expense on time deposit liabilities.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.6)

-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 6

-Article 9

Name:	us-gaap_InterestExpenseDomesticDepositLiabilitiesTimeDeposit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration