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
	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)