Note 6: 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
Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses Beginning Balance	$ 3,860	$ 4,176	$ 3,598
Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses Ending Balance	3,860		3,860
Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses Beginning Balance	3,860	4,176	3,598
Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses Ending Balance	3,860		3,860
Credit Losses Recognized on Investments
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, Additional Credit Losses			262
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold		$ (4,176)