NOTE 7: ACQUIRED LOANS, LOSS SHARING AGREEMENTS AND FDIC INDEMNIFICATION ASSETS: Schedule of Accretable Yield Changes for Acquired Loans (Details) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2018		Sep. 30, 2017		Sep. 30, 2018		Sep. 30, 2017
TeamBank
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion	$ (294)		$ (352)		$ (736)		$ (1,319)
Change in expected accretable yield	103	[1]	287	[1]	216	[2]	1,080	[2]
TeamBank | Beginning of Period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	1,742		2,303		2,071		2,477
TeamBank | End of Period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	1,551		2,238		1,551		2,238
Vantus Bank
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion	(279)		(310)		(897)		(1,048)
Change in expected accretable yield	234	[1]	211	[1]	654	[2]	582	[2]
Vantus Bank | Beginning of Period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	1,652		2,180		1,850		2,547
Vantus Bank | End of Period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	1,607		2,081		1,607		2,081
Sun Security Bank
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion	(399)		(561)		(1,253)		(1,757)
Change in expected accretable yield	500	[1]	(270)	[1]	508	[2]	335	[2]
Sun Security Bank | Beginning of Period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	2,055		3,686		2,901		4,277
Sun Security Bank | End of Period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	2,156		2,855		2,156		2,855
InterBank
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion	(2,293)		(1,688)		(5,943)		(5,850)
Change in expected accretable yield	2,054	[1]	625	[1]	6,540	[2]	1,689	[2]
InterBank | Beginning of Period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	5,910		5,414		5,074		8,512
InterBank | End of Period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	5,671		4,351		5,671		4,351
Valley Bank
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion	(901)		(1,378)		(3,098)		(4,772)
Change in expected accretable yield	578	[1]	889	[1]	3,054	[2]	2,799	[2]
Valley Bank | Beginning of Period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	2,974		3,313		2,695		4,797
Valley Bank | End of Period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	$ 2,651		$ 2,824		$ 2,651		$ 2,824

[1] Represents increases in estimated cash flows expected to be received from the acquired loan pools, partially due to lower estimated credit losses. The amounts 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 September 30, 2018, totaling $103,000, $234,000, $485,000, $604,000 and $578,000, respectively, and for the three months ended September 30, 2017, totaling $268,000, $204,000, $(270,000), $625,000 and $444,000, respectively.

[2] Represents increases in estimated cash flows expected to be received from the acquired loan pools, partially due to lower estimated credit losses. The amounts also include changes in expected accretion of the loan pools for TeamBank, Vantus Bank, Sun Security Bank, InterBank and Valley Bank for the nine months ended September 30, 2018, totaling $201,000, $654,000, $318,000, $3.6 million and $2.3 million, respectively, and for the nine months ended September 30, 2017, totaling $1.1 million, $569,000, $335,000, $1.7 million and $2.2 million, respectively.