Note 5. Derivative Instruments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011		Dec. 31, 2011
Derivative Liability Notional Amount	$ 8,000				$ 8,000				$ 10,000
Derivative Fixed Interest Rate	1.60%				1.60%				1.60%
Long Term Debt Percentage Bearing Fixed Interest Rate	4.95%				4.95%				4.95%
Derivative Liability, Fair Value, Gross Liability	377				377				494
Unrealized gains (losses) on derivative instruments, net of tax	76	[1]	(354)	[2]	71	[3]	(354)	[2]
Unrealized gains (losses) on derivative instruments, taxes	50		235		47		235
Other Comprehensive Income (Loss)
Unrealized gains (losses) on derivative instruments, net of tax	76		354		71		354
Other Liabilities
Derivative Liability, Fair Value, Gross Liability	$ 377				$ 377				$ 494

[1] net of taxes of $50.

[2] net of taxes of $235.

[3] net of taxes of $47.