Note 14: Income Taxes: Schedule of Effective Income Tax Rate Reconciliation (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	35.00%	35.00%	35.00%
Effective Income Tax Reconciliation Nontaxable Interest and Dividends	(3.50%)	(6.30%)	(5.10%)
Effective Income Tax Rate Reconciliation, Tax Credits	(12.50%)	(15.20%)	(4.00%)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes	0.50%	0.70%	0.80%
Effective Income Tax Rate Reconciliation, Other Adjustments	(0.10%)	0.70%	0.20%
Effective Income Tax Rate Reconciliation	19.40%	14.90%	26.90%