NOTE 7: ACQUIRED LOANS, LOSS SHARING AGREEMENTS AND FDIC INDEMNIFICATION ASSETS: Schedule of Accretable Yield Changes for Acquired Loans (Details) - USD ($)	3 Months Ended				9 Months Ended
	Sep. 30, 2020		Sep. 30, 2019		Sep. 30, 2020		Sep. 30, 2019
TeamBank
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion	$ (94)		$ (196)		$ (334)		$ (811)
Change in expected accretable yield	178	[1]	(9)	[1]	179	[2]	600	[2]
TeamBank | Beginning of Period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	918		1,350		1,157		1,356
TeamBank | End of Period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	1,002		1,145		1,002		1,145
Vantus Bank
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion	(238)		(259)		(657)		(738)
Change in expected accretable yield	88	[1]	305	[1]	338	[2]	579	[2]
Vantus Bank | Beginning of Period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	954		1,227		1,123		1,432
Vantus Bank | End of Period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	804		1,273		804		1,273
Sun Security Bank
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion	(238)		(414)		(831)		(1,195)
Change in expected accretable yield	79	[1]	872	[1]	617	[2]	1,270	[2]
Sun Security Bank | Beginning of Period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	1,893		1,859		1,948		2,242
Sun Security Bank | End of Period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	1,734		2,317		1,734		2,317
InterBank
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion	(1,599)		(2,371)		(5,563)		(6,350)
Change in expected accretable yield	808	[1]	2,840	[1]	1,747	[2]	10,290	[2]
InterBank | Beginning of Period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	5,252		8,465		8,277		4,994
InterBank | End of Period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	4,461		8,934		4,461		8,934
Valley Bank
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion	(658)		(1,257)		(2,398)		(3,243)
Change in expected accretable yield	92	[1]	1,565	[1]	1,377	[2]	6,032	[2]
Valley Bank | Beginning of Period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	4,123		5,544		4,578		3,063
Valley Bank | End of Period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)	$ 3,557		$ 5,852		$ 3,557		$ 5,852

[1] Represents increases (decreases) 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, 2020, totaling $178,000, $88,000, $79,000, $808,000 and $92,000, respectively, and for the three months ended September 30, 2019, totaling $(21,000), $132,000, $565,000, $(644,000) and $482,000, respectively.

[2] Represents increases (decreases) 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, 2020, totaling $179,000, $338,000, $617,000, $1.7 million and $1.4 million, respectively, and for the nine months ended September 30, 2019, totaling $526,000, $406,000, $812,000, $4.0 million and $2.7 million, respectively.