Note 28: Condensed Parent Company Statements: Condensed Income Statement -- Great Southern Bancorp, Inc. (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Gain on Redemption of Trust Preferred Securities		$ (1,115)
Total interest expense	$ 22,119	15,997	$ 15,801
Statements of Income | Parent Company
Income before income tax and equity in undistributed earnings of subsidiaries	11,034	26,561	34,237
Income Tax Credits and Adjustments	(241)	(91)	(388)
Income before equity in earnings of subsidiaries	11,275	26,652	34,625
Equity in undistributed earnings of subsidiaries	34,067	19,850	8,904
Net income parent company	45,342	46,502	43,529
Statements of Income | Parent Company | Income
Dividends from subsidiary bank	12,000	27,000	36,000
Other Interest and Dividend Income		5	22
Gain on Redemption of Trust Preferred Securities	2,735	1,416
Other income (loss)	2	(7)	(20)
Total income	14,737	28,414	36,002
Statements of Income | Parent Company | Expense
Operating Expenses	1,322	1,139	1,198
Total interest expense	2,381	714	567
Total expense	$ 3,703	$ 1,853	$ 1,765