Note 27: Condensed Parent Company Statements: Condensed Cash Flow Statement -- Great Southern Bancorp, Inc. (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Gain on Redemption of Trust Preferred Securities	$ (1,115)
Amortization of interest rate derivative	204	$ 19
Prepaid expenses and other assets	3,982	8,430	$ (7,529)
Net cash provided by operating activities	71,429	67,433	93,921
Net cash provided by (used in) investing activities	(196,195)	35,870	124,690
Redemption of preferred stock	(57,943)
Redemption of Trust Preferred Securities	(3,885)
Net cash provided by (used in) financing activities	105,302	(112,581)	(394,827)
Statements of Cash Flows | Parent Company
Cash, Period Increase (Decrease)	(44,827)	25,871	15,535
Cash beginning of period	64,836	38,965	23,430
Cash end of period	20,009	64,836	38,965
Statements of Cash Flows | Parent Company | Operating Activities
Operating Activity Net Income Parent Company	46,502	43,529	33,729
Net cash provided by operating activities	25,913	35,182	23,008
Statements of Cash Flows | Parent Company | Operating Activities | Items not requiring (providing) cash
Increase (Decrease) Equity in Undistributed Earnings of Subsidiaries	(19,850)	(8,904)	(11,023)
Compensation expense for stock option grants	382	565	443
Gain on Redemption of Trust Preferred Securities	(1,115)
Net realized gains on sales of non-marketable securities	(301)
Statements of Cash Flows | Parent Company | Operating Activities | Changes in
Prepaid expenses and other assets	(27)	(3)	4
Accounts Payable and Other Accrued Liabilities	63	(67)	(146)
Income taxes parent	55	43	1
Statements of Cash Flows | Parent Company | Investing Activities
Investment/Return of principal - other investments	16	20	(13)
Net cash provided by (used in) investing activities	16	20	(13)
Statements of Cash Flows | Parent Company | Financing Activities
Payments for Derivative Instrument, Financing Activities			(738)
Redemption of preferred stock	(57,943)
Redemption of Trust Preferred Securities	(3,885)
Payments for Repurchase of Warrants		(512)
Dividends, Paid-in-kind	(12,290)	(11,257)	(7,964)
Stock options excercised	3,362	2,438	1,242
Net cash provided by (used in) financing activities	$ (70,756)	$ (9,331)	$ (7,460)