Note 4: Acquired Loans, Loss Sharing Agreements and FDIC Indemnification Assets: Business Combinations Policy: Business Acquisition, InterBank Assets Acquired and Liabilities Assumed (Details) - InterBank - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Apr. 27, 2012
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets				$ 285,500
Business Combination, Indemnification Assets, Amount as of Acquisition Date				$ 84,000
Discount Recorded in Conjunction with Fair Value of Acquired Loans and Amount Accreted to Yield	$ 359	$ 459	$ 544