Note 6: Investment Securities: Other than Temporary Impairment, Credit Losses Recognized in Earnings (Details) (Changes in Accretable Yield for Acquired Loans, USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Changes in Accretable Yield for Acquired Loans
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held, Beginning Balance	$ 4,176	$ 3,598	$ 4,176	$ 3,598
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, Additional Credit Losses		262		262
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold	(4,176)		(4,176)
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held, Ending Balance		$ 3,860		$ 3,860