Deposits - Contractual Maturities of Time Certificates of Deposit (Detail) (USD $)	Dec. 31, 2013
Banking And Thrift [Abstract]
Weighted Average Interest Rate, Due within 1 year	0.96%
Weighted Average Interest Rate, Due within 1-2 years	1.99%
Weighted Average Interest Rate, Due within 2-3 years	1.59%
Weighted Average Interest Rate, Due within 3-4 years	1.58%
Weighted Average Interest Rate, Due within 4-5 years	0.85%
Weighted Average Interest Rate, Due Total	1.07%
Certificate of Deposit, Due within 1 year	$ 200,555,373
Certificate of Deposit, Due within 1-2 years	16,514,915
Certificate of Deposit, Due within 2-3 years	5,661,154
Certificate of Deposit, Due within 3-4 years	8,018,162
Certificate of Deposit, Due within 4-5 years	5,185,527
Certificate of Deposit, Due Total	$ 235,935,131

Time deposits weighted average interest rate.

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Amount of time deposits maturing in the fifth fiscal year following the latest fiscal year. Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

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Amount of time deposits maturing in the fourth fiscal year following the latest fiscal year. Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts.

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Amount of time deposits maturing in the next fiscal year following the latest fiscal year. Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts.

+ References

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Amount of time deposits maturing in the third fiscal year following the latest fiscal year. Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts.

+ References

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Amount of time deposits maturing in the second fiscal year following the latest fiscal year. Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts.

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Amount of deposits that cannot be withdrawn before a set date without penalty or for which notice of withdrawal is required. Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.12)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 12

-Article 9

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Weighted average interest rate for time deposits held by the entity with maturities greater than four years, but five years or less.

+ References

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Weighted average interest rate for time deposits held by the entity with maturities greater than three years, but four years or less.

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Weighted average interest rate for time deposits held by the entity with maturities of one year or less.

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Weighted average interest rate for time deposits held by the entity with maturities greater than two years, but three years or less.

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Weighted average interest rate for time deposits held by the entity with maturities greater than one year, but two years or less.

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No definition available.

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