Note 8: Loss Sharing Agreements and FDIC Indemnification Assets: Schedule of Accretable Yield for Acquired Loan Pools (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
TeamBank
Accretable yield for acquired loans balance Beginning of Period	$ 11,403		$ 23,145		$ 14,662		$ 36,765
Acquired Loans Accretion	(4,709)		(11,263)		(13,799)		(32,786)
Acquired Loans Reclassification from nonaccretable difference	5,863	[1],[2]	7,700	[1],[2]	11,694	[3],[4]	15,603	[3],[4]
Accretable yield for acquired loans balance End of Period	12,557		19,582		12,557		19,582
Vantus Bank
Accretable yield for acquired loans balance Beginning of Period	17,882		26,883		21,967		35,796
Acquired Loans Accretion	(6,980)		(6,855)		(17,320)		(22,365)
Acquired Loans Reclassification from nonaccretable difference	4,510	[1],[2]	5,651	[1],[2]	10,765	[3],[4]	12,248	[3],[4]
Accretable yield for acquired loans balance End of Period	15,412		25,679		15,412		25,679
Sun Security Bank
Accretable yield for acquired loans balance Beginning of Period	9,775				12,769
Acquired Loans Accretion	(3,668)				(10,750)
Acquired Loans Reclassification from nonaccretable difference	2,902	[1],[2]			6,990	[3],[4]
Accretable yield for acquired loans balance End of Period	9,009				9,009
InterBank
Acquired Loans Accretion	(4,303)				(7,154)
Accretable yield for acquired loans balance End of Period	38,924				38,924
Acquired Loans Additions	$ 43,227				$ 46,078

[1] Represents increases in estimated cash flows expected to be received from the acquired loan pools, primarily due to lower estimated credit losses. The numbers also include changes in expected accretion of the loan pools for TeamBank, Vantus Bank, and Sun Security Bank for the three months ended September 30, 2012, totaling $2.5 million, $2.9 million and $3.4 million, respectively, and for the three months ended September 30, 2011, totaling $6.7 million, $6.6 million and $0, respectively.

[2] Represents increases in estimated cash flows expected to be received from the acquired loan pools, primarily due to lower estimated credit losses. The numbers also include changes in expected accretion of the loan pools for TeamBank, Vantus Bank, and Sun Security Bank for the three months ended September 30, 2012, totaling $3.1 million, $4.0 million and $1.8 million, respectively, and for the three months ended September 30, 2011, totaling $6.7 million, $6.6 million and $0, respectively.

[3] Represents increases in estimated cash flows expected to be received from the acquired loan pools, primarily due to lower estimated credit losses. The numbers also include changes in expected accretion of the loan pools for TeamBank, Vantus Bank, and Sun Security Bank for the nine months ended September 30, 2012, totaling $2.9 million, $3.7 million, and $3.4 million, respectively, and for the nine months ended September 30, 2011, totaling $13.8 million, $10.7 million and $0, respectively.

[4] Represents increases in estimated cash flows expected to be received from the acquired loan pools, primarily due to lower estimated credit losses. The numbers also include changes in expected accretion of the loan pools for TeamBank, Vantus Bank, and Sun Security Bank for the nine months ended September 30, 2012, totaling $6.0 million, $7.6 million, and $5.2 million, respectively, and for the nine months ended September 30, 2011, totaling $13.8 million, $10.7 million and $0, respectively.