Note 4: Acquired Loans, Loss Sharing Agreements and FDIC Indemnification Assets: Schedule of Changes in Accretable Yield for Acquired Loan Pools (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
TeamBank
Acquired Loans Accretion	$ (9,473)		$ (20,129)		$ (40,010)
Acquired Loans Reclassification from nonaccretable yield	4,747	[1]	17,595	[1]	17,907	[1]
TeamBank | Balance beginning of period
Certain Loans Acquired in Transfer, Accretable Yield					36,765
TeamBank | Balance end of period
Certain Loans Acquired in Transfer, Accretable Yield	7,402		12,128		14,662
Vantus Bank
Acquired Loans Accretion	(8,940)		(21,437)		(30,908)
Acquired Loans Reclassification from nonaccretable yield	1,127	[1]	13,008	[1]	17,079	[1]
Vantus Bank | Balance beginning of period
Certain Loans Acquired in Transfer, Accretable Yield					35,796
Vantus Bank | Balance end of period
Certain Loans Acquired in Transfer, Accretable Yield	5,725		13,538		21,967
Sun Security Bank
Acquired loans accretable yield					14,990
Acquired Loans Accretion	(16,885)		(15,851)		(2,221)
Acquired Loans Reclassification from nonaccretable yield	16,739	[1]	14,341	[1]
Sun Security Bank | Balance end of period
Certain Loans Acquired in Transfer, Accretable Yield	11,113		11,259		12,769
InterBank
Acquired loans accretable yield			46,078
Acquired Loans Accretion	(28,667)		(11,998)
Acquired Loans Reclassification from nonaccretable yield	26,188	[1]	8,494	[1]
InterBank | Balance end of period
Certain Loans Acquired in Transfer, Accretable Yield	$ 40,095		$ 42,574

[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, Sun Security Bank and InterBank for the year ended December 31, 2013, totaling $2.3 million, $611,000, $4.8 million and $146,000, respectively; for TeamBank, Vantus Bank, Sun Security Bank and InterBank for the year ended December 31, 2012, totaling $5.2 million, $4.4 million, $3.6 million and $2.4 million, respectively; and for TeamBank and Vantus Bank for the year ended December 31, 2011, totaling $3.5 million and $4.4 million, respectively.