Note 2: Investments in Debt and Equity Securities: Other-than-temporary Impairment Policy (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Nonagency Collateralized Mortgage Obligations Book Value Other than Temporary Impairment	$ 680	$ 1,800
Nonagency Collateralized Mortgage Obligations Pre-Tax Charge to Income	$ 680	$ 615