Interest Expense on Deposits (Detail) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
NOW and SuperNOW	$ 15,754	$ 28,819	$ 27,833
Money Market	25,914	54,006	66,840
Savings	106,424	160,446	147,998
Certificates of Deposit, $100,000 or more	459,130	558,538	734,355
Other time deposits	2,003,684	2,236,531	2,719,605
Interest expense	$ 2,610,906	$ 3,038,340	$ 3,696,631

Aggregate amount of all interest expense on domestic 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

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Amount of interest expense on domestic certificates of deposit liabilities.

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Amount of interest expense on domestic money market demand account deposit liabilities.

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Amount of interest expense on domestic notice of withdrawal demand deposit liabilities.

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Amount of interest expense on domestic time deposit liabilities other than certificates of liabilities.

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Amount of interest expense on domestic savings deposit liabilities.

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