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Note 4: Acquired Loans, Loss Sharing Agreements and FDIC Indemnification Assets: Business Acquisition Fair Value and Expected Cash Flows Policy: Schedule of Business Combination Accretable Yield (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Increase in accretable yield due to increased cash flow expectations | $ 42,567 | $ 27,069 | $ 58,951
Decrease in FDIC indemnification asset as a result of accretable yield increase | $ (34,054) | $ (23,821) | $ (51,888)

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