Basis of Presentation	3 Months Ended
Jun. 30, 2011
Basis of Presentation [Abstract]
Basis of Presentation and Significant Accounting Policies [Text Block]	NOTE 1: BASIS OF PRESENTATION The accompanying unaudited interim consolidated financial statements of Great Southern Bancorp, Inc. (the "Company" or "Great Southern") have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. The financial statements presented herein reflect all adjustments which are, in the opinion of management, necessary to fairly present the financial condition, results of operations and cash flows of the Company for the periods presented. Those adjustments consist only of normal recurring adjustments. Operating results for the three and six months ended June 30, 2011 are not necessarily indicative of the results that may be expected for the full year. The consolidated statement of financial condition of the Company as of December 31, 2010, has been derived from the audited consolidated statement of financial condition of the Company as of that date. Certain prior periods’ amounts have been reclassified to conform to the current period presentation. These reclassifications had no effect on net income. Certain information and note disclosures normally included in the Company's annual financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Company's Annual Report on Form 10-K for 2010 filed with the Securities and Exchange Commission.

Basis of Presentation

3 Months Ended

Jun. 30, 2011

Basis of Presentation and Significant Accounting Policies [Text Block]

NOTE 1: BASIS OF PRESENTATION

The accompanying unaudited interim consolidated financial statements of Great Southern Bancorp, Inc. (the "Company" or "Great Southern") have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. The financial statements presented herein reflect all adjustments which are, in the opinion of management, necessary to fairly present the financial condition, results of operations and cash flows of the Company for the periods presented. Those adjustments consist only of normal recurring adjustments. Operating results for the three and six months ended June 30, 2011 are not necessarily indicative of the results that may be expected for the full year. The consolidated statement of financial condition of the Company as of December 31, 2010, has been derived from the audited consolidated statement of financial condition of the Company as of that date. Certain prior periods’ amounts have been reclassified to conform to the current period presentation. These reclassifications had no effect on net income.

Certain information and note disclosures normally included in the Company's annual financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Company's Annual Report on Form 10-K for 2010 filed with the Securities and Exchange Commission.