Note 6. Net Realized Investment Gains (losses): Realized Gain (Loss) on Investments (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Available-for-sale Securities, Realized Losses, Excluding Other than Temporary Impairments	$ 575,000	$ 520,000	$ 1,022,000
Trading Securities, Realized Gain (Loss)	9,000
Other Trading Securites Losses			(1,266,000)
Available-for-sale Securities, Transfers to Trading, Gains (Losses), Excluding Other than Temporary Impairments	20,000
Trading Securities, Change in Unrealized Holding Gain (Loss)	(1,000)
Marketable Securities, Unrealized Gain (Loss), Excluding Other than Temporary Impairments	19,000
Net realized investment gains (losses)	603,000	520,000	(244,000)
Debt Securities
Available-for-sale Securities, Realized Losses, Excluding Other than Temporary Impairments	579,000	737,000	919,000
COMMON STOCK
Available-for-sale Securities, Realized Losses, Excluding Other than Temporary Impairments		(146,000)	127,000
Preferred Stock
Available-for-sale Securities, Realized Losses, Excluding Other than Temporary Impairments	$ (4,000)	$ (71,000)	$ (24,000)