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Note 8: Loss Sharing Agreements and FDIC Indemnification Assets: InterBank Business Combination Policy (Details) (InterBank, USD $) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2012 | Sep. 30, 2012 | Apr. 27, 2012
InterBank |  |  |
Business Acquisition Fair Value Assumed Deposits |  |  | $ 456,300,000
Business Acquisition Fair Value Purchased Loans |  |  | 285,500,000
Business Acquisition Fair Value Foreclosed Assets |  |  | 6,200,000
Business Acquisition Foreclosed Assets Discount |  |  | 59,900,000
Acquired Loans Premium and Amount Amortized to Yield | $ (68,000) | $ 126,000 |

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