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 $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Mar. 20, 2009
TeamBank
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets				$ 222,800,000
Business Combination, Indemnification Assets, Amount as of Acquisition Date				153,600,000
Business Combination Recognized Assets Acquired and Liabilities Assumed After Adjustment				264,400,000
Business Combination Indemnification Assets Amount as of Acquisition Date After Adjustment				128,300,000
Discount Recorded in Conjunction with Fair Value of Acquired Loans and Amount Accreted to Yield	$ 134,000	$ 1,200,000	$ 2,500,000