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		12 Months Ended
		Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
TeamBank
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion		$ (3,265)		$ (4,138)		$ (9,473)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference		205	[1]	3,601	[1]	4,747	[2]
TeamBank | Beginning of Period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)						12,128
TeamBank | End of Period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)		3,805		6,865		7,402
Vantus Bank
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion		(2,541)		(3,835)		(8,940)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference		1,448	[1]	2,563	[1]	1,127	[2]
Vantus Bank | Beginning of Period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)						13,538
Vantus Bank | End of Period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)		3,360		4,453		5,725
Sun Security Bank
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion		(5,487)		(10,590)		(16,885)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference		3,459	[1]	7,429	[1]	16,739	[2]
Sun Security Bank | Beginning of Period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)						11,259
Sun Security Bank | End of Period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)		5,924		7,952		11,113
InterBank
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion		(28,767)		(37,994)		(28,667)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference		9,022	[1]	33,991	[1]	26,188	[2]
InterBank | Beginning of Period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)						42,574
InterBank | End of Period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)		16,347		36,092		$ 40,095
Valley Bank
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion		(10,975)		(4,788)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference	[1]	8,159		(7,056)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Additions				22,976
Valley Bank | End of Period
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease)		$ 8,316		$ 11,132

[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 year ended December 31, 2015, totaling $40,000, $1.1 million, $2.0 million, $4.8 million and $759,000, respectively; for TeamBank, Vantus Bank, Sun Security Bank, InterBank and Valley Bank for the year ended December 31, 2014, totaling $3.2 million, $2.4 million, $3.9 million, $9.2 million and $(9.6 million), respectively; and 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.

[2] Represents increases in estimated cash flows expected to be received from the acquired loan pools, primarily 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 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.