Note 8: Acquired Loans, Loss Sharing Agreements and FDIC Indemnification Assets: Schedule of Changes Accretable Yield for Acquired Loan Pools (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
TeamBank
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion	$ (887)		$ (1,450)		$ (3,169)		$ (7,050)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference	725	[1]	1,109	[1]	3,039	[2]	3,191	[2]
TeamBank | Beginning of period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	7,434		8,610		7,402		12,128
TeamBank | End of period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	7,272		8,269		7,272		8,269
Vantus Bank
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion	(859)		(1,832)		(2,990)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference	916	[1]	(379)	[1]	1,900	[2]	390	[2]
Vantus Bank | Beginning of period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	4,578		8,647		5,725		13,538
Vantus Bank | End of period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	4,635		6,436		4,635		6,436
Sun Security Bank
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion	(2,119)		(4,795)		(7,343)		(13,021)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference	789	[1]	5,293	[1]	4,327	[2]	12,315	[2]
Sun Security Bank | Beginning of period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	9,427		10,055		11,113		11,259
Sun Security Bank | End of period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	8,097		10,553		8,097		10,553
InterBank
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion	(10,002)		(7,034)		(28,404)		(20,423)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference	4,857	[1]	7,774	[1]	24,272	[2]	13,556	[2]
InterBank | Beginning of period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	41,108		34,967		40,095		42,574
InterBank | End of period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	35,963		35,707		35,963		35,707
Valley Bank
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion	(2,062)				(2,227)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Additions					22,976
Valley Bank | Beginning of period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	22,811
Valley Bank | End of period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	$ 20,749				$ 20,749

[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 three months ended September 30, 2014, totaling $522,000, $831,000, $139,000 and $707,000, respectively, and for the three months ended September 30, 2013, totaling $340,000, $0, $4.3 million and $7.3 million, respectively. There have not yet been any changes to the expected accretion of the loan pools for Valley Bank.

[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, Sun Security Bank and InterBank for the nine months ended September 30, 2014, totaling $2.8 million, $1.8 million, $1.5 million and $2.4 million, respectively, and for the nine months ended September 30, 2013, totaling $2.5 million, $516,000, $9.0 million and $14.9 million, respectively. There have not yet been any changes to the expected accretion of the loan pools for Valley Bank.