Note 4: Acquired Loans, Loss Sharing Agreements and FDIC Indemnification Assets: Business Combinations Policy (Policies)	12 Months Ended
Dec. 31, 2016
TeamBank
Business Combinations Policy	TeamBank On March 20, 2009, Great Southern Bank entered into a purchase and assumption agreement with loss share with the Federal Deposit Insurance Corporation (FDIC) to assume all of the deposits (excluding brokered deposits) and acquire certain assets of TeamBank, N.A., a full service commercial bank headquartered in Paola, Kansas. The loans, commitments and foreclosed assets purchased in the TeamBank transaction were covered by a loss sharing agreement between the FDIC and Great Southern Bank. Under the loss sharing agreement, the Bank shared in the losses on assets covered under the agreement (referred to as covered assets). On losses up to $115.0 million, the FDIC agreed to reimburse the Bank for 80% of the losses. On losses exceeding $115.0 million, the FDIC agreed to reimburse the Bank for 95% of the losses. Realized losses covered by the loss sharing agreement included loan contractual balances (and related unfunded commitments that were acquired), accrued interest on loans for up to 90 days, the book value of foreclosed real estate acquired, and certain direct costs, less cash or other consideration received by Great Southern. This agreement originally was to extend for ten years for 1-4 family real estate loans and for five years for other loans. The five-year period ended March 31, 2014 and the ten-year period was terminated early, effective April 26, 2016, by mutual agreement of Great Southern Bank and the FDIC. See “Loss Sharing Agreements” below. Based upon the acquisition date fair values of the net assets acquired, no goodwill was recorded.
Vantus Bank
Business Combinations Policy	Vantus Bank On September 4, 2009, Great Southern Bank entered into a purchase and assumption agreement with loss share with the FDIC to assume all of the deposits and acquire certain assets of Vantus Bank, a full service thrift headquartered in Sioux City, Iowa. The loans, commitments and foreclosed assets purchased in the Vantus Bank transaction were covered by a loss sharing agreement between the FDIC and Great Southern Bank. Under the loss sharing agreement, the Bank shared in the losses on assets covered under the agreement (referred to as covered assets). On losses up to $102.0 million, the FDIC agreed to reimburse the Bank for 80% of the losses. On losses exceeding $102.0 million, the FDIC agreed to reimburse the Bank for 95% of the losses. Realized losses covered by the loss sharing agreement included loan contractual balances (and related unfunded commitments that were acquired), accrued interest on loans for up to 90 days, the book value of foreclosed real estate acquired, and certain direct costs, less cash or other consideration received by Great Southern. This agreement originally was to extend for ten years for 1-4 family real estate loans and for five years for other loans. The five-year period ended September 30, 2014 and the ten-year period was terminated early, effective April 26, 2016, by mutual agreement of Great Southern Bank and the FDIC. See “Loss Sharing Agreements” below. Based upon the acquisition date fair values of the net assets acquired, no goodwill was recorded.
Sun Security Bank
Business Combinations Policy	Sun Security Bank On October 7, 2011, Great Southern Bank entered into a purchase and assumption agreement with loss share with the FDIC to assume all of the deposits and acquire certain assets of Sun Security Bank, a full service bank headquartered in Ellington, Missouri. The loans and foreclosed assets purchased in the Sun Security Bank transaction are covered by a loss sharing agreement between the FDIC and Great Southern Bank. Under the loss sharing agreement, the FDIC 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. Realized losses covered by the loss sharing agreement include loan contractual balances (and related unfunded commitments that were acquired), accrued interest on loans for up to 90 days, the book value of foreclosed real estate acquired, and certain direct costs, less cash or other consideration received by Great Southern. This agreement originally was to extend for ten years for 1-4 family real estate loans and for five years for other loans but was terminated early, effective April 26, 2016, by mutual agreement of Great Southern Bank and the FDIC. See “Loss Sharing Agreements” below. Based upon the acquisition date fair values of the net assets acquired, no goodwill was recorded. A discount was recorded in conjunction with the fair value of the acquired loans and the amount accreted to yield during 2016, 2015 and 2014 was $0, $0 and $105,000, respectively.
InterBank
Business Combinations Policy	InterBank On April 27, 2012, Great Southern Bank entered into a purchase and assumption agreement with loss share with the FDIC to assume all of the deposits and acquire certain assets of Inter Savings Bank, FSB (“InterBank”), a full service bank headquartered in Maple Grove, Minnesota. The loans and foreclosed assets purchased in the InterBank transaction are covered by a loss sharing agreement between the FDIC and Great Southern Bank. Under the loss sharing agreement, the FDIC has agreed to cover 80% of the losses on the loans (excluding approximately $60,000 of consumer loans) and foreclosed assets purchased subject to certain limitations. Realized losses covered by the loss sharing agreement include loan contractual balances (and related unfunded commitments that were acquired), accrued interest on loans for up to 90 days, the book value of foreclosed real estate acquired, and certain direct costs, less cash or other consideration received by Great Southern. This agreement extends for ten years for 1-4 family real estate loans and for five years for other loans. The value of this loss sharing agreement was considered in determining fair values of loans and foreclosed assets acquired. The loss sharing agreement is subject to the Bank following servicing procedures as specified in the agreement with the FDIC. The expected reimbursements under the loss sharing agreement were recorded as an indemnification asset at their preliminary estimated fair value on the acquisition date. Based upon the acquisition date fair values of the net assets acquired, no goodwill was recorded. The Bank recorded the fair value of the acquired loans at their estimated fair value of $285.5 million and the related FDIC indemnification asset was recorded at its estimated fair value of $84.0 million. A premium was recorded in conjunction with the fair value of the acquired loans and the amount amortized to yield during 2016, 2015 and 2014 was $359,000, $459,000 and $544,000, respectively.
Valley Bank
Business Combinations Policy	Valley Bank On June 20, 2014, Great Southern Bank entered into a purchase and assumption agreement with the FDIC to purchase a substantial portion of the loans and investment securities, as well as certain other assets, and assume all of the deposits, as well as certain other liabilities, of Valley Bank, a full-service bank headquartered in Moline, Illinois, with significant operations in Iowa. This transaction did not include a loss sharing agreement. In this transaction, the Company acquired assets with a fair value of approximately $378.7 million (approximately 10.0% of the Company’s total consolidated assets at acquisition) and assumed liabilities with a fair value of approximately $367.9 million (approximately 9.8% of the Company’s total consolidated assets at acquisition). Based upon the acquisition date fair values of the net assets acquired, no goodwill was recorded. The transaction resulted in a one-time gain of $10.8 million, which was included in Noninterest Income in the Company’s Consolidated Statement of Income for the year ended December 31, 2014. During 2014, the Company continued to analyze its estimates of the fair values of the assets acquired and liabilities assumed. The Company finalized its analysis of these assets and liabilities without adjustments to the initial fair value estimates. The Bank recorded the fair value of the acquired loans at their estimated fair value of $165.1 million. A premium was recorded in conjunction with the fair value of the acquired loans and the amount amortized to yield during 2016, 2015 and 2014 was $491,000, $794,000 and $501,000, respectively.

Note 4: Acquired Loans, Loss Sharing Agreements and FDIC Indemnification Assets: Business Combinations Policy (Policies)

12 Months Ended

Dec. 31, 2016

Business Combinations Policy

TeamBank

On March 20, 2009, Great Southern Bank entered into a purchase and assumption agreement with loss share with the Federal Deposit Insurance Corporation (FDIC) to assume all of the deposits (excluding brokered deposits) and acquire certain assets of TeamBank, N.A., a full service commercial bank headquartered in Paola, Kansas.

The loans, commitments and foreclosed assets purchased in the TeamBank transaction were covered by a loss sharing agreement between the FDIC and Great Southern Bank. Under the loss sharing agreement, the Bank shared in the losses on assets covered under the agreement (referred to as covered assets). On losses up to $115.0 million, the FDIC agreed to reimburse the Bank for 80% of the losses. On losses exceeding $115.0 million, the FDIC agreed to reimburse the Bank for 95% of the losses. Realized losses covered by the loss sharing agreement included loan contractual balances (and related unfunded commitments that were acquired), accrued interest on loans for up to 90 days, the book value of foreclosed real estate acquired, and certain direct costs, less cash or other consideration received by Great Southern. This agreement originally was to extend for ten years for 1-4 family real estate loans and for five years for other loans. The five-year period ended March 31, 2014 and the ten-year period was terminated early, effective April 26, 2016, by mutual agreement of Great Southern Bank and the FDIC. See “Loss Sharing Agreements” below. Based upon the acquisition date fair values of the net assets acquired, no goodwill was recorded.

Vantus Bank

Business Combinations Policy

Vantus Bank

On September 4, 2009, Great Southern Bank entered into a purchase and assumption agreement with loss share with the FDIC to assume all of the deposits and acquire certain assets of Vantus Bank, a full service thrift headquartered in Sioux City, Iowa.

The loans, commitments and foreclosed assets purchased in the Vantus Bank transaction were covered by a loss sharing agreement between the FDIC and Great Southern Bank. Under the loss sharing agreement, the Bank shared in the losses on assets covered under the agreement (referred to as covered assets). On losses up to $102.0 million, the FDIC agreed to reimburse the Bank for 80% of the losses. On losses exceeding $102.0 million, the FDIC agreed to reimburse the Bank for 95% of the losses. Realized losses covered by the loss sharing agreement included loan contractual balances (and related unfunded commitments that were acquired), accrued interest on loans for up to 90 days, the book value of foreclosed real estate acquired, and certain direct costs, less cash or other consideration received by Great Southern. This agreement originally was to extend for ten years for 1-4 family real estate loans and for five years for other loans. The five-year period ended September 30, 2014 and the ten-year period was terminated early, effective April 26, 2016, by mutual agreement of Great Southern Bank and the FDIC. See “Loss Sharing Agreements” below. Based upon the acquisition date fair values of the net assets acquired, no goodwill was recorded.

Sun Security Bank

Business Combinations Policy

Sun Security Bank

On October 7, 2011, Great Southern Bank entered into a purchase and assumption agreement with loss share with the FDIC to assume all of the deposits and acquire certain assets of Sun Security Bank, a full service bank headquartered in Ellington, Missouri.

The loans and foreclosed assets purchased in the Sun Security Bank transaction are covered by a loss sharing agreement between the FDIC and Great Southern Bank. Under the loss sharing agreement, the FDIC 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. Realized losses covered by the loss sharing agreement include loan contractual balances (and related unfunded commitments that were acquired), accrued interest on loans for up to 90 days, the book value of foreclosed real estate acquired, and certain direct costs, less cash or other consideration received by Great Southern. This agreement originally was to extend for ten years for 1-4 family real estate loans and for five years for other loans but was terminated early, effective April 26, 2016, by mutual agreement of Great Southern Bank and the FDIC. See “Loss Sharing Agreements” below. Based upon the acquisition date fair values of the net assets acquired, no goodwill was recorded. A discount was recorded in conjunction with the fair value of the acquired loans and the amount accreted to yield during 2016, 2015 and 2014 was $0, $0 and $105,000, respectively.

InterBank

Business Combinations Policy

InterBank

On April 27, 2012, Great Southern Bank entered into a purchase and assumption agreement with loss share with the FDIC to assume all of the deposits and acquire certain assets of Inter Savings Bank, FSB (“InterBank”), a full service bank headquartered in Maple Grove, Minnesota.

The loans and foreclosed assets purchased in the InterBank transaction are covered by a loss sharing agreement between the FDIC and Great Southern Bank. Under the loss sharing agreement, the FDIC has agreed to cover 80% of the losses on the loans (excluding approximately $60,000 of consumer loans) and foreclosed assets purchased subject to certain limitations. Realized losses covered by the loss sharing agreement include loan contractual balances (and related unfunded commitments that were acquired), accrued interest on loans for up to 90 days, the book value of foreclosed real estate acquired, and certain direct costs, less cash or other consideration received by Great Southern. This agreement extends for ten years for 1-4 family real estate loans and for five years for other loans. The value of this loss sharing agreement was considered in determining fair values of loans and foreclosed assets acquired. The loss sharing agreement is subject to the Bank following servicing procedures as specified in the agreement with the FDIC. The expected reimbursements under the loss sharing agreement were recorded as an indemnification asset at their preliminary estimated fair value on the acquisition date. Based upon the acquisition date fair values of the net assets acquired, no goodwill was recorded. The Bank recorded the fair value of the acquired loans at their estimated fair value of $285.5 million and the related FDIC indemnification asset was recorded at its estimated fair value of $84.0 million. A premium was recorded in conjunction with the fair value of the acquired loans and the amount amortized to yield during 2016, 2015 and 2014 was $359,000, $459,000 and $544,000, respectively.

Valley Bank

Business Combinations Policy

Valley Bank

On June 20, 2014, Great Southern Bank entered into a purchase and assumption agreement with the FDIC to purchase a substantial portion of the loans and investment securities, as well as certain other assets, and assume all of the deposits, as well as certain other liabilities, of Valley Bank, a full-service bank headquartered in Moline, Illinois, with significant operations in Iowa. This transaction did not include a loss sharing agreement.

In this transaction, the Company acquired assets with a fair value of approximately $378.7 million (approximately 10.0% of the Company’s total consolidated assets at acquisition) and assumed liabilities with a fair value of approximately $367.9 million (approximately 9.8% of the Company’s total consolidated assets at acquisition). Based upon the acquisition date fair values of the net assets acquired, no goodwill was recorded. The transaction resulted in a one-time gain of $10.8 million, which was included in Noninterest Income in the Company’s Consolidated Statement of Income for the year ended December 31, 2014. During 2014, the Company continued to analyze its estimates of the fair values of the assets acquired and liabilities assumed. The Company finalized its analysis of these assets and liabilities without adjustments to the initial fair value estimates. The Bank recorded the fair value of the acquired loans at their estimated fair value of $165.1 million. A premium was recorded in conjunction with the fair value of the acquired loans and the amount amortized to yield during 2016, 2015 and 2014 was $491,000, $794,000 and $501,000, respectively.