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Note 4: Acquired Loans, Loss Sharing Agreements and FDIC Indemnification Assets: Schedule of Business Combination Accretable Yield (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Details      
Increase in accretable yield due to increased cash flow expectations $ 31,461fil_IncreaseInAccretableYieldDueToIncreasedCashFlowExpectations $ 40,947fil_IncreaseInAccretableYieldDueToIncreasedCashFlowExpectations $ 42,567fil_IncreaseInAccretableYieldDueToIncreasedCashFlowExpectations
Decrease in FDIC indemnification asset as a result of accretable yield increase $ (23,129)fil_DecreaseInFDICIndemnificationAssetAsAResultOfAccretableYieldIncrease $ (32,597)fil_DecreaseInFDICIndemnificationAssetAsAResultOfAccretableYieldIncrease $ (34,054)fil_DecreaseInFDICIndemnificationAssetAsAResultOfAccretableYieldIncrease