Note 2. Fair Value of Financial Instruments (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended		12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Selling Costs	10.00%
Impaired Financing Receivable, with Related Allowance, Recorded Investment	$ 4,661		$ 3,491
Impaired Financing Receivable, Related Allowance	1,845		655
Allowance for Loan and Lease Losses, Adjustments, Net	1,946	1,306
Servicing Asset at Fair Value, Amount	417		430
Servicing Asset at Amortized Cost	560		573
Servicing Asset at Amortized Value, Valuation Allowance	143		143
Other Real Estate Owned Net			2,948
Other Real Estate, Foreclosed Assets, and Repossessed Assets	3,292		4,256
Real Estate Owned, Valuation Allowance, Amounts Applied			1,266
Real Estate, Write-down or Reserve, Amount			1,266
Evaluated for Impairment [Member]
Other Real Estate, Foreclosed Assets, and Repossessed Assets			$ 4,214