Note 4: Acquired Loans, Loss Sharing Agreements and FDIC Indemnification Assets: Sun Security Bank Acquisition Policy: Business Acquisition, Sun Security Bank Assets Acquired and Liabilities Assumed (Details) (Sun Security Bank, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Oct. 07, 2011
Sun Security Bank
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets				$ 163,700
Business Combination, Indemnification Assets, Amount as of Acquisition Date				67,400
Discount Recorded in Conjunction with Fair Value of Acquired Loans and Amount Accreted to Yield	$ 105	$ 974	$ 1,600