Note 4: Acquired Loans, Loss Sharing Agreements and FDIC Indemnification Assets: Business Combinations Policy: Business Acquisition, TeamBank Assets Acquired and Liabilities Assumed (Details) - TeamBank - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Mar. 20, 2009
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets				$ 222,800
Business Combination, Indemnification Assets, Amount as of Acquisition Date				153,600
Business Combination Recognized Assets Acquired and Liabilities Assumed After Adjustment				264,400
Business Combination Indemnification Assets Amount as of Acquisition Date After Adjustment				$ 128,300
Discount Recorded in Conjunction with Fair Value of Acquired Loans and Amount Accreted to Yield	$ 0	$ 0	$ 134