Note 8: Acquired Loans, Loss Sharing Agreements and FDIC Indemnification Assets: Schedule of Accretable Yield Changes for Acquired Loans (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2015		Jun. 30, 2014		Jun. 30, 2015		Jun. 30, 2014
TeamBank
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion	$ (713)		$ (976)		$ (2,114)		$ (2,282)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference	(496)	[1]	1,047	[1]	(11)	[2]	2,314	[2]
TeamBank | Beginning of period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	5,949		7,363		6,865		7,402
TeamBank | End of period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	4,740		7,434		4,740		7,434
Vantus Bank
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion	(710)		(1,000)		(1,391)		(2,131)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference	154	[1]	427	[1]	913	[2]	984	[2]
Vantus Bank | Beginning of period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	4,531		5,151		4,453		5,725
Vantus Bank | End of period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	3,975		4,578		3,975		4,578
Sun Security Bank
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion	(1,365)		(2,407)		(3,318)		(5,224)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference	649	[1]	1,827	[1]	2,050	[2]	3,538	[2]
Sun Security Bank | Beginning of period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	7,400		10,007		7,952		11,113
Sun Security Bank | End of period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	6,684		9,427		6,684		9,427
InterBank
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion	(7,797)		(10,038)		(16,997)		(18,402)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference	716	[1]	12,173	[1]	5,632	[2]	19,415	[2]
InterBank | Beginning of period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	31,808		38,973		36,092		40,095
InterBank | End of period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	24,727		41,108		24,727		41,108
Valley Bank
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield, Additions					23,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion	(2,357)		(165)		(4,860)		(165)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference	636	[1]			3,094	[2]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Additions							23,000
Valley Bank | Beginning of period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	11,087				11,132
Valley Bank | End of period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	$ 9,366		$ 22,835		$ 9,366		$ 22,835

[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, InterBank and Valley Bank for the three months ended June 30, 2015, totaling $(496,000), $154,000, $649,000, $716,000 and $(264,000), respectively, and for the three months ended June 30, 2014, totaling $1.0 million, $427,000, $352,000, $448,000 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, Sun Security Bank, InterBank and Valley Bank for the six months ended June 30, 2015, totaling $(176,000), $527,000, $1.1 million, $1.6 million and $344,000, respectively, and for the six months ended June 30, 2014, totaling $2.3 million, $984,000, $1.4 million, $1.7 million and $-0-, respectively.