Note 7: Investments in Limited Partnerships: Investments in Affordable Housing Partnerships Policy (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Details
Investments in Affordable Housing Partnerships Carrying Value, Net	$ 18,200	$ 21,800
Federal Affordable Housing Tax Credits	40,000
Expected Amortization of Investments in Affordable Housing Partnerships	34,900
Usage of Federal Affordable Housing Tax Credits	6,600	6,200	$ 6,300
Actual Amortization of Investments in Affordable Housing Partnerships	$ 5,200	$ 4,400	$ 4,900