Subsequent Events	3 Months Ended
Sep. 30, 2011
Subsequent Events
Subsequent Events [Text Block]	NOTE 14: SUBSEQUENT EVENT On October 7, 2011, Great Southern Bank entered into a purchase and assumption agreement, including a loss sharing agreement, with the FDIC to purchase substantially all of the assets and assume substantially all of the deposits and other liabilities of Sun Security Bank, a full-service bank headquartered in Ellington, Mo. Established in 1970, Sun Security Bank operated 27 locations in 15 counties in central and southern Missouri. Only one market, Stockton, Mo., overlapped between the Sun Security Bank and Great Southern footprints, with both institutions operating one branch in this market. Great Southern Bank assumed approximately $280 million of deposits of Sun Security Bank at no premium and purchased approximately $241 million in loans and $30 million of foreclosed assets at a discount of $55 million. In addition, Great Southern Bank assumed approximately $55 million of advances from the Federal Home Loan Bank. Under the loss sharing agreement the FDIC has agreed to cover 80% of the losses on the loans (excluding approximately $4 million of consumer loans) and foreclosed assets purchased subject to certain limitations. Also included in the assets purchased are cash and certain marketable securities of Sun Security Bank. The Company anticipates recording the transaction in accordance with FASB ASC 805, Business Combinations, during the quarter ending December 31, 2011. The transaction is anticipated to be accretive to income and equity for the quarter ending December 31, 2011. However, pricing on these types of FDIC-assisted transactions has become more competitive since our 2009 FDIC-assisted transactions and we do not expect our gain to be of the magnitude of the gains associated with our 2009 FDIC-assisted transactions. The Company expects to convert the Sun Security Bank operational systems into Great Southern’s systems in January 2012, which will allow all Great Southern and former Sun Security Bank customers to conduct business at all banking centers throughout the Great Southern five-state franchise. For further information, see the Current Report on Form 8-K filed by the Company on October 12, 2011. The Purchase and Assumption Agreement dated as of October 7, 2011 between the FDIC and the Bank is filed as Exhibit 2.1 to this report.

Subsequent Events

3 Months Ended

Sep. 30, 2011

NOTE 14: SUBSEQUENT EVENT

On October 7, 2011, Great Southern Bank entered into a purchase and assumption agreement, including a loss sharing agreement, with the FDIC to purchase substantially all of the assets and assume substantially all of the deposits and other liabilities of Sun Security Bank, a full-service bank headquartered in Ellington, Mo. Established in 1970, Sun Security Bank operated 27 locations in 15 counties in central and southern Missouri. Only one market, Stockton, Mo., overlapped between the Sun Security Bank and Great Southern footprints, with both institutions operating one branch in this market. Great Southern Bank assumed approximately $280 million of deposits of Sun Security Bank at no premium and purchased approximately $241 million in loans and $30 million of foreclosed assets at a discount of $55 million. In addition, Great Southern Bank assumed approximately $55 million of advances from the Federal Home Loan Bank. Under the loss sharing agreement the FDIC has agreed to cover 80% of the losses on the loans (excluding approximately $4 million of consumer loans) and foreclosed assets purchased subject to certain limitations. Also included in the assets purchased are cash and certain marketable securities of Sun Security Bank. The Company anticipates recording the transaction in accordance with FASB ASC 805, Business Combinations, during the quarter ending December 31, 2011. The transaction is anticipated to be accretive to income and equity for the quarter ending December 31, 2011. However, pricing on these types of FDIC-assisted transactions has become more competitive since our 2009 FDIC-assisted transactions and we do not expect our gain to be of the magnitude of the gains associated with our 2009 FDIC-assisted transactions. The Company expects to convert the Sun Security Bank operational systems into Great Southern’s systems in January 2012, which will allow all Great Southern and former Sun Security Bank customers to conduct business at all banking centers throughout the Great Southern five-state franchise. For further information, see the Current Report on Form 8-K filed by the Company on October 12, 2011. The Purchase and Assumption Agreement dated as of October 7, 2011 between the FDIC and the Bank is filed as Exhibit 2.1 to this report.