Note 6. Goodwill and Intangible Assets (Details) - Finite-Lived Intangible Assets (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Amortization Expense	$ 2,100,000	$ 2,000,000	$ 100,000
Finite-Lived Intangible Assets, Net [Abstract]
Finite-Lived Intangible Assets, Gross	9,139,000	6,135,000
Finite-Lived Intangible Assets, Accumulated Amortization	(5,404,000)	(3,280,000)
Finite-Lived Intangible Assets, Net	3,735,000	2,855,000
Finite-Lived Intangible Assets, Future Amortization Expense, Current and Five Succeeding Fiscal Years [Abstract]
2012	393,000
2013	393,000
2014	392,000
2015	389,000
2016	356,000
Thereafter	1,812,000
Total estimated future amortization expense	$ 3,735,000