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Investment Securities (Detail) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Investment Securities [Line Items]
Amortized Cost	$ 96,401,241	$ 99,801,499	$ 88,934,612
Gross Unrealized Gains	4,221,335	3,414,914	1,155,674
Gross Unrealized Losses	132,309	349,858	2,821,927
Fair Value	100,490,267	102,866,555	87,268,359
U.S. Government agencies
Investment Securities [Line Items]
Amortized Cost	28,360	28,360	1,028,360
Gross Unrealized Gains	0	0	51,640
Gross Unrealized Losses	320	0	200
Fair Value	28,040	28,360	1,079,800
State and municipal
Investment Securities [Line Items]
Amortized Cost	38,528,451	37,165,358	34,775,927
Gross Unrealized Gains	2,623,768	1,808,576	54,285
Gross Unrealized Losses	14,797	46,811	1,960,277
Fair Value	41,137,422	38,927,123	32,869,935
Corporate trust preferred
Investment Securities [Line Items]
Amortized Cost	349,646	635,239	1,793,287
Gross Unrealized Gains	0	0	64,898
Gross Unrealized Losses	65,116	200,015	717,115
Fair Value	284,530	435,224	1,141,070
Mortgage-backed
Investment Securities [Line Items]
Amortized Cost	57,494,784	61,972,542	51,337,038
Gross Unrealized Gains	1,597,567	1,606,338	984,851
Gross Unrealized Losses	52,076	103,032	144,335
Fair Value	$ 59,040,275	$ 63,475,848	$ 52,177,554

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This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.2)

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-Name FASB Staff Position (FSP)

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-Paragraph 7

-Footnote 2

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 19

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 25

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=7534914&loc=d3e22054-111558



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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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-Name Accounting Standards Codification

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-URI http://asc.fasb.org/extlink&oid=6505594

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 22

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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