Note 4: Acquired Loans, Loss Sharing Agreements and FDIC Indemnification Assets: Teambank Acquisition Policy: Business Acquisition, TeamBank Assets Acquired and Liabilities Assumed (Details) (TeamBank, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Mar. 20, 2009
TeamBank
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	$ 134	$ 1,200