Note 9. Troubled Debt Restructuring (Detail) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Impaired Financing Receivable, Related Allowance	$ 6,916,587	$ 6,466,579
Troubled Debt Restructurings [Member]
Impaired Financing Receivable, Related Allowance	$ 2,179,666	$ 1,942,567

Amount of allowance for credit losses related to recorded investment.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524

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