Preferred Stock and Common Stock Warrant	12 Months Ended
Dec. 31, 2011
Preferred Stock and Common Stock Warrant [Abstract]
Preferred Stock and Common Stock Warrant	Note 28: Preferred Stock and Common Stock Warrant *CPP Preferred Stock and Common Stock Warrant* On December 5, 2008, as part of the Troubled Asset Relief Program (TARP) Capital Purchase Program of the United States Department of the Treasury (Treasury), the Company entered into a Letter Agreement and Securities Purchase Agreement (collectively, the “CPP Purchase Agreement”) with Treasury, pursuant to which the Company (i) sold to Treasury 58,000 shares of the Company’s Fixed Rate Cumulative Perpetual Preferred Stock, Series A (the “CPP Preferred Stock”), having a liquidation preference amount of $1,000 per share, for a purchase price of $58.0 million in cash and (ii) issued to Treasury a ten-year warrant (the “Warrant”) to purchase 909,091 shares of the Company’s common stock, par value $0.01 per share (the “Common Stock”), at an exercise price of $9.57 per share. As noted below under “SBLF Preferred Stock,” the Company redeemed all of the CPP Preferred Stock on August 18, 2011, in connection with the issuance of the SBLF Preferred Stock. As noted below under “Repurchase of Common Stock Warrant,” the Company repurchased the Warrant on September 21, 2011. The CPP Preferred Stock qualified as Tier 1 capital and paid cumulative dividends on the liquidation preference amount on a quarterly basis at a rate of 5% per annum. Under the CPP Purchase Agreement, the Company could not, without the consent of Treasury, (a) pay a cash dividend on the Company’s common stock of more than $0.18 per share or (b) subject to limited exceptions, redeem, repurchase or otherwise acquire shares of the Company’s common stock or preferred stock, other than the CPP Preferred Stock or trust preferred securities. In addition, under the terms of the CPP Preferred Stock, the Company could not pay dividends on its common stock unless it was current in its dividend payments on the CPP Preferred Stock. The proceeds from the TARP Capital Purchase Program were allocated between the CPP Preferred Stock and the Warrant based on relative fair value, which resulted in an initial carrying value of $55.5 million for the CPP Preferred Shares and $2.5 million for the Warrant. The resulting discount to the CPP Preferred Shares of $2.5 million was set up to accrete on a level-yield basis over five years ending December 2013 and was recognized as additional preferred stock dividends. The fair value assigned to the CPP Preferred Shares was estimated using a discounted cash flow model. The discount rate used in the model was based on yields on comparable publicly traded perpetual preferred stocks. The fair value assigned to the warrant was based on a Black Scholes option-pricing model using several inputs, including risk-free rate, expected stock price volatility and expected dividend yield. The CPP Preferred Stock and the Warrant were issued in a private placement exempt from registration pursuant to Section 4(2) of the Securities Act of 1933, as amended (the “Securities Act”). In accordance with the CPP Purchase Agreement, the Company subsequently registered the CPP Preferred Stock, the Warrant and the shares of Common Stock underlying the Warrant under the Securities Act. *SBLF Preferred Stock* On August 18, 2011, the Company entered into a Small Business Lending Fund-Securities Purchase Agreement (the “SBLF Purchase Agreement”) with the Secretary of the Treasury, pursuant to which the Company sold 57,943 shares of the Company’s Senior Non-Cumulative Perpetual Preferred Stock, Series A (the “SBLF Preferred Stock”) to the Secretary of the Treasury for a purchase price of $57.9 million. The SBLF Preferred Stock was issued pursuant to Treasury’s SBLF program, a $30 billion fund established under the Small Business Jobs Act of 2010 that was created to encourage lending to small businesses by providing Tier 1 capital to qualified community banks and holding companies with assets of less than $10 billion. As required by the SBLF Purchase Agreement, the proceeds from the sale of the SBLF Preferred Stock were used in connection with the redemption of the 58,000 shares of CPP Preferred Stock, issued to the Treasury pursuant to the CPP, at a redemption price of $58.0 million plus the accrued dividends owed on the preferred shares. This redemption resulted in a one-time, non-cash write-off of the remaining $1.2 million discount to the CPP Preferred Stock that reduced earnings available to common shareholders during the year ended December 31, 2011. The SBLF Preferred Stock qualifies as Tier 1 capital. The holders of SBLF Preferred Stock are entitled to receive non-cumulative dividends, payable quarterly, on each January 1, April 1, July 1 and October 1, beginning October 1, 2011. The dividend rate, as a percentage of the liquidation amount, can fluctuate on a quarterly basis during the first 10 quarters during which the SBLF Preferred Stock is outstanding, based upon changes in the level of “Qualified Small Business Lending” or “QSBL” (as defined in the SBLF Purchase Agreement) by the Bank over the adjusted baseline level calculated under the terms of the SBLF Preferred Stock $(158,271,000). The initial dividend rate through September 30, 2011, was 5%. Based upon the increase in the Bank’s level of QSBL over the baseline level, the dividend rate for the fourth quarter of 2011 was 2.6%. For the third through ninth calendar quarters after the closing, the dividend rate may be adjusted to between one percent (1%) and five percent (5%) per annum based on the level of qualifying loans. For the tenth calendar quarter through four and one half years after issuance, the dividend rate will be fixed at between one percent (1%) and seven percent (7%) based upon the level of qualifying loans. After four and one half years from issuance, the dividend rate will increase to 9% (including a quarterly lending incentive fee of 0.5%). The SBLF Preferred Stock is non-voting, except in limited circumstances. In the event that the Company misses five dividend payments, whether or not consecutive, the holder of the SBLF Preferred Stock will have the right, but not the obligation, to appoint a representative as an observer on the Company’s Board of Directors. In the event that the Company misses six dividend payments, whether or not consecutive, and if the then outstanding aggregate liquidation amount of the SBLF Preferred Stock is at least $25.0 million, then the holder of the SBLF Preferred Stock will have the right to designate two directors to the Board of Directors of the Company. The SBLF Preferred Stock may be redeemed at any time at the Company’s option, at a redemption price of 100% of the liquidation amount plus accrued but unpaid dividends to the date of redemption for the current period, subject to the approval of its federal banking regulator. *Repurchase of Common Stock Warrant* On September 21, 2011, the Company completed the repurchase of the Warrant held by the Treasury that was issued as a part of its participation in the CPP. The Warrant, which had a ten year term, was issued on December 5, 2008 and entitled the Treasury to purchase 909,091 shares of Great Southern Bancorp, Inc. common stock at an exercise price of $9.57 per share. The repurchase was completed for a price of $6.4 million, or $7.08 per warrant share, which was based on the fair market value of the warrant as agreed upon by the Company and the Treasury.

Preferred Stock and Common Stock Warrant

12 Months Ended

Dec. 31, 2011

Preferred Stock and Common Stock Warrant [Abstract]

Preferred Stock and Common Stock Warrant

Note 28: Preferred Stock and Common Stock Warrant

CPP Preferred Stock and Common Stock Warrant

On December 5, 2008, as part of the Troubled Asset Relief Program (TARP) Capital Purchase Program of the United States Department of the Treasury (Treasury), the Company entered into a Letter Agreement and Securities Purchase Agreement (collectively, the “CPP Purchase Agreement”) with Treasury, pursuant to which the Company (i) sold to Treasury 58,000 shares of the Company’s Fixed Rate Cumulative Perpetual Preferred Stock, Series A (the “CPP Preferred Stock”), having a liquidation preference amount of $1,000 per share, for a purchase price of $58.0 million in cash and (ii) issued to Treasury a ten-year warrant (the “Warrant”) to purchase 909,091 shares of the Company’s common stock, par value $0.01 per share (the “Common Stock”), at an exercise price of $9.57 per share. As noted below under “SBLF Preferred Stock,” the Company redeemed all of the CPP Preferred Stock on August 18, 2011, in connection with the issuance of the SBLF Preferred Stock. As noted below under “Repurchase of Common Stock Warrant,” the Company repurchased the Warrant on September 21, 2011.

The CPP Preferred Stock qualified as Tier 1 capital and paid cumulative dividends on the liquidation preference amount on a quarterly basis at a rate of 5% per annum.

Under the CPP Purchase Agreement, the Company could not, without the consent of Treasury, (a) pay a cash dividend on the Company’s common stock of more than $0.18 per share or (b) subject to limited exceptions, redeem, repurchase or otherwise acquire shares of the Company’s common stock or preferred stock, other than the CPP Preferred Stock or trust preferred securities. In addition, under the terms of the CPP Preferred Stock, the Company could not pay dividends on its common stock unless it was current in its dividend payments on the CPP Preferred Stock.

The proceeds from the TARP Capital Purchase Program were allocated between the CPP Preferred Stock and the Warrant based on relative fair value, which resulted in an initial carrying value of $55.5 million for the CPP Preferred Shares and $2.5 million for the Warrant. The resulting discount to the CPP Preferred Shares of $2.5 million was set up to accrete on a level-yield basis over five years ending December 2013 and was recognized as additional preferred stock dividends. The fair value assigned to the CPP Preferred Shares was estimated using a discounted cash flow model. The discount rate used in the model was based on yields on comparable publicly traded perpetual preferred stocks. The fair value assigned to the warrant was based on a Black Scholes option-pricing model using several inputs, including risk-free rate, expected stock price volatility and expected dividend yield.

The CPP Preferred Stock and the Warrant were issued in a private placement exempt from registration pursuant to Section 4(2) of the Securities Act of 1933, as amended (the “Securities Act”). In accordance with the CPP Purchase Agreement, the Company subsequently registered the CPP Preferred Stock, the Warrant and the shares of Common Stock underlying the Warrant under the Securities Act.

SBLF Preferred Stock

On August 18, 2011, the Company entered into a Small Business Lending Fund-Securities Purchase Agreement (the “SBLF Purchase Agreement”) with the Secretary of the Treasury, pursuant to which the Company sold 57,943 shares of the Company’s Senior Non-Cumulative Perpetual Preferred Stock, Series A (the “SBLF Preferred Stock”) to the Secretary of the Treasury for a purchase price of $57.9 million. The SBLF Preferred Stock was issued pursuant to Treasury’s SBLF program, a $30 billion fund established under the Small Business Jobs Act of 2010 that was created to encourage lending to small businesses by providing Tier 1 capital to qualified community banks and holding companies with assets of less than $10 billion. As required by the SBLF Purchase Agreement, the proceeds from the sale of the SBLF Preferred Stock were used in connection with the redemption of the 58,000 shares of CPP Preferred Stock, issued to the Treasury pursuant to the CPP, at a redemption price of $58.0 million plus the accrued dividends owed on the preferred shares. This redemption resulted in a one-time, non-cash write-off of the remaining $1.2 million discount to the CPP Preferred Stock that reduced earnings available to common shareholders during the year ended December 31, 2011.

The SBLF Preferred Stock qualifies as Tier 1 capital. The holders of SBLF Preferred Stock are entitled to receive non-cumulative dividends, payable quarterly, on each January 1, April 1, July 1 and October 1, beginning October 1, 2011. The dividend rate, as a percentage of the liquidation amount, can fluctuate on a quarterly basis during the first 10 quarters during which the SBLF Preferred Stock is outstanding, based upon changes in the level of “Qualified Small Business Lending” or “QSBL” (as defined in the SBLF Purchase Agreement) by the Bank over the adjusted baseline level calculated under the terms of the SBLF Preferred Stock $(158,271,000). The initial dividend rate through September 30, 2011, was 5%. Based upon the increase in the Bank’s level of QSBL over the baseline level, the dividend rate for the fourth quarter of 2011 was 2.6%. For the third through ninth calendar quarters after the closing, the dividend rate may be adjusted to between one percent (1%) and five percent (5%) per annum based on the level of qualifying loans. For the tenth calendar quarter through four and one half years after issuance, the dividend rate will be fixed at between one percent (1%) and seven percent (7%) based upon the level of qualifying loans. After four and one half years from issuance, the dividend rate will increase to 9% (including a quarterly lending incentive fee of 0.5%).

The SBLF Preferred Stock is non-voting, except in limited circumstances. In the event that the Company misses five dividend payments, whether or not consecutive, the holder of the SBLF Preferred Stock will have the right, but not the obligation, to appoint a representative as an observer on the Company’s Board of Directors. In the event that the Company misses six dividend payments, whether or not consecutive, and if the then outstanding aggregate liquidation amount of the SBLF Preferred Stock is at least $25.0 million, then the holder of the SBLF Preferred Stock will have the right to designate two directors to the Board of Directors of the Company.

The SBLF Preferred Stock may be redeemed at any time at the Company’s option, at a redemption price of 100% of the liquidation amount plus accrued but unpaid dividends to the date of redemption for the current period, subject to the approval of its federal banking regulator.

Repurchase of Common Stock Warrant

On September 21, 2011, the Company completed the repurchase of the Warrant held by the Treasury that was issued as a part of its participation in the CPP. The Warrant, which had a ten year term, was issued on December 5, 2008 and entitled the Treasury to purchase 909,091 shares of Great Southern Bancorp, Inc. common stock at an exercise price of $9.57 per share. The repurchase was completed for a price of $6.4 million, or $7.08 per warrant share, which was based on the fair market value of the warrant as agreed upon by the Company and the Treasury.