Note 7: Investments in Limited Partnerships: Investments in Affordable Housing Partnerships Policy (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Number of Investments in Affordable Housing Partnerships	11	11
Investments in Affordable Housing Partnerships Net Carrying Value	$ 33,900	$ 28,700
Federal Affordable Housing Tax Credits	44,200
Expected Amortization of Investments in Affordable Housing Partnerships	33,400
Usage of Federal Affordable Housing Tax Credits	5,200	2,600	1,300
Actual Amortization of Investments in Affordable Housing Partnerships	$ 4,600	$ 1,900	$ 1,200