Note 4. Investment Securities: Other than Temporary Impairment, Credit Losses Recognized in Earnings (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2013
Details
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held	$ 2,600	$ 1,976	$ 2,555	$ 563
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, No Previous Impairment			473
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, Additional Credit Losses			148
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold	(624)	(1,413)	(1,200)
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held	$ 1,976	$ 563	$ 1,976	$ 563