Note 9. Troubled Debt Restructuring (Detail) - Summary of Troubled Debt Restructurings in Default (USD $)	Jun. 30, 2012	Dec. 31, 2011
Number of Modifications	139	114
Total in Default (in Dollars)	$ 27,445,776	$ 23,328,148
Susequent Default [Member] | Residential Real Estate Loans [Member]
Number of Modifications	19	18
Total in Default (in Dollars)	3,413,078	2,860,627
Susequent Default [Member] | Multifamily Portfolio Segment [Member]
Number of Modifications	1
Total in Default (in Dollars)	465,479
Susequent Default [Member] | Installment and Other Loans [Member]
Number of Modifications	3
Total in Default (in Dollars)	29,358
Susequent Default [Member] | Total [Member]
Number of Modifications	23	18
Total in Default (in Dollars)	3,907,915	2,860,627
Construction Portfolio Segment [Member]
Number of Modifications	3	4
Total in Default (in Dollars)	630,536	1,245,535
Commercial Real Estate Portfolio Segment [Member]
Number of Modifications	22	13
Total in Default (in Dollars)	11,253,083	6,569,779
Residential Real Estate Loans [Member]
Number of Modifications	101	86
Total in Default (in Dollars)	15,013,674	15,026,344
Multifamily Portfolio Segment [Member]
Number of Modifications	2	2
Total in Default (in Dollars)	368,135	370,897
Installment and Other Loans [Member]
Number of Modifications	11	9
Total in Default (in Dollars)	$ 180,348	$ 115,593