Summary of Significant Accounting Policies	6 Months Ended
Jun. 30, 2016
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Note 1 – Summary of Significant Accounting Policies (a) Nature of Operations and Principles of Consolidation The accompanying consolidated financial statements include the accounts of Southeastern Bank Financial Corporation and its wholly-owned subsidiary, Georgia Bank & Trust Company of Augusta, Georgia, together referred to as “the Company.” Significant intercompany transactions and balances are eliminated in consolidation. Dollar amounts are rounded to thousands except share and per share data. The Company provides financial services through its offices in Richmond and Columbia Counties, Georgia, and Aiken County, South Carolina. Its primary deposit products are checking, savings, and term certificate accounts, and its primary lending products are residential mortgage, commercial, and installment loans. Substantially all loans are secured by specific items of collateral including business assets, consumer assets, and commercial and residential real estate. Commercial loans are expected to be repaid from cash flow from operations of businesses. The Company has a significant concentration of commercial real estate loans. The ability of these customers to repay their loans is dependent on the real estate and general economic conditions in the area. The financial statements for the three and six months ended June 30, 2016 and 2015 are unaudited and have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted pursuant to such rules and regulations. These consolidated financial statements should be read in conjunction with the audited consolidated financial statements and footnotes included in the Company’s annual report on Form 10-K for the year ended December 31, 2015. In the opinion of management, all adjustments necessary to present fairly the financial position and the results of operations and cash flows for the interim periods have been made. All such adjustments are of a normal recurring nature. The results of operations for the three and six months ended June 30, 2016 are not necessarily indicative of the results of operations which the Company may achieve for the entire year. Some items in the prior period financial statements were reclassified to conform to the current presentation. (b) Recent Accounting Pronouncements In May 2014, the FASB issued an update (ASU No. 2014-09, Revenue from Contracts with Customers) creating FASB Topic 606, Revenue from Contracts with Customers. The guidance in this update affects any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of nonfinancial assets unless those contracts are within the scope of other standards (for example, insurance contracts or lease contracts). The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance provides steps to follow to achieve the core principle. An entity should disclose sufficient information to enable users of financial statements to understand the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. Qualitative and quantitative information is required about contracts with customers, significant judgments and changes in judgments, and assets recognized from the costs to obtain or fulfill a contract. The amendments in this update are effective for interim and annual reporting periods beginning after December 15, 2017. We are currently evaluating the impact of adopting the new guidance on the consolidated financial statements. In January 2016, the FASB issued an update (ASU No. 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities.) The guidance in this update affects any entity that holds financial assets or owes financial liabilities. It is intended to provide users of financial statements with more useful information on the recognition, measurement, presentation, and disclosure of financial instruments by requiring (1) equity investments (except those accounted for under the equity method) to be measured at fair value with changes in fair value recognized in net income (2) public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes (3) entities to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value (4) a separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or the accompanying notes and eliminating (1) the requirement to disclose the fair value of financial instruments measured at amortized cost for entities that are not public business entities and (2) the requirement for public business entities to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet. The amendments in this update are effective for fiscal years, and interim periods within those years, beginning after December 15, 2017. The Company is currently evaluating the impact on the consolidated financial statements and related disclosures. In February 2016, the FASB issued an update (ASU No. 2016-02, Leases) creating FASB Topic 842, Leases. The guidance is intended to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and requiring more disclosures related to leasing transactions. The amendments in this update are effective for fiscal years, and interim periods within those years, beginning after December 15, 2018. Early adoption is permitted. The Company is currently evaluating the impact on the consolidated financial statements and related disclosures. In March 2016, the FASB issued an update (ASU No. 2016-08, Revenue from Contracts with Customers: Principal versus Agent Considerations.) The amendments in this update affect the guidance in ASU 2014-09, Revenue from Contracts with Customers. The amendments do not change the core principal of the guidance, but rather clarify the implementation guidance on principal versus agent considerations. The amendments in this update are effective for fiscal years, and interim periods within those years, beginning after December 15, 2017. The Company is currently evaluating the impact on the consolidated financial statements and related disclosures. In March 2016, the FASB issued an update (ASU No. 2016-09, Stock Compensation: Improvements to Employee Share-Based Payment Accounting.) The guidance in this update affects any entity that issues share-based payment awards to its employees and is intended to simplify several aspects of the accounting for share-based payment awards including income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. The amendments in this update are effective for fiscal years, and interim periods within those years, beginning after December 15, 2016. Early adoption is permitted. The Company is currently evaluating the impact on the consolidated financial statements and related disclosures. In June 2016, the FASB issued an update (ASU No. 2016-13, Financial Instruments: Credit Losses.) The guidance affects entities holding financial assets and net investment in leases that are not accounted for at fair value through net income. The amendments in this update require timelier recording of credit losses on loans and other financial instruments and are effective for fiscal years, and interim periods within those years, beginning after December 15, 2019. Early adoption is permitted for fiscal years beginning after December 15, 2018. The Company is currently evaluating the impact on the consolidated financial statements and related disclosures. (c) Merger On June 16, 2016, the Company entered into an Agreement and Plan of Merger (the “Merger Agreement”) with South State Corporation, a South Carolina corporation (“South State”). The Merger Agreement provides that, upon the terms and subject to the conditions set forth therein, the Company will merge with and into South State (the “Merger”), with South State as the surviving corporation in the Merger. Immediately following the Merger, the Company’s wholly-owned subsidiary bank, Georgia Bank & Trust Company of Augusta (“Georgia Bank & Trust”), will merge with and into South State’s wholly-owned subsidiary bank, South State Bank (the “Bank Merger”), with South State Bank as the surviving entity in the Bank Merger. The Merger is subject to, among other things, regulatory approval and other customary closing conditions and is expected to close in the first quarter of 2017.

Summary of Significant Accounting Policies

6 Months Ended

Jun. 30, 2016

Summary of Significant Accounting Policies

Note 1 – Summary of Significant Accounting Policies

(a) Nature of Operations and Principles of Consolidation

The accompanying consolidated financial statements include the accounts of Southeastern Bank Financial Corporation and its wholly-owned subsidiary, Georgia Bank & Trust Company of Augusta, Georgia, together referred to as “the Company.” Significant intercompany transactions and balances are eliminated in consolidation. Dollar amounts are rounded to thousands except share and per share data.

The Company provides financial services through its offices in Richmond and Columbia Counties, Georgia, and Aiken County, South Carolina. Its primary deposit products are checking, savings, and term certificate accounts, and its primary lending products are residential mortgage, commercial, and installment loans. Substantially all loans are secured by specific items of collateral including business assets, consumer assets, and commercial and residential real estate. Commercial loans are expected to be repaid from cash flow from operations of businesses. The Company has a significant concentration of commercial real estate loans. The ability of these customers to repay their loans is dependent on the real estate and general economic conditions in the area.

The financial statements for the three and six months ended June 30, 2016 and 2015 are unaudited and have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted pursuant to such rules and regulations. These consolidated financial statements should be read in conjunction with the audited consolidated financial statements and footnotes included in the Company’s annual report on Form 10-K for the year ended December 31, 2015.

In the opinion of management, all adjustments necessary to present fairly the financial position and the results of operations and cash flows for the interim periods have been made. All such adjustments are of a normal recurring nature. The results of operations for the three and six months ended June 30, 2016 are not necessarily indicative of the results of operations which the Company may achieve for the entire year.

Some items in the prior period financial statements were reclassified to conform to the current presentation.

(b) Recent Accounting Pronouncements

In May 2014, the FASB issued an update (ASU No. 2014-09, Revenue from Contracts with Customers) creating FASB Topic 606, Revenue from Contracts with Customers. The guidance in this update affects any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of nonfinancial assets unless those contracts are within the scope of other standards (for example, insurance contracts or lease contracts). The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance provides steps to follow to achieve the core principle. An entity should disclose sufficient information to enable users of financial statements to understand the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. Qualitative and quantitative information is required about contracts with customers, significant judgments and changes in judgments, and assets recognized from the costs to obtain or fulfill a contract. The amendments in this update are effective for interim and annual reporting periods beginning after December 15, 2017. We are currently evaluating the impact of adopting the new guidance on the consolidated financial statements.

In January 2016, the FASB issued an update (ASU No. 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities.) The guidance in this update affects any entity that holds financial assets or owes financial liabilities. It is intended to provide users of financial statements with more useful information on the recognition, measurement, presentation, and disclosure of financial instruments by requiring (1) equity investments (except those accounted for under the equity method) to be measured at fair value with changes in fair value recognized in net income (2) public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes (3) entities to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value (4) a separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or the accompanying notes and eliminating (1) the requirement to disclose the fair value of financial instruments measured at amortized cost for entities that are not public business entities and (2) the requirement for public business entities to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet. The amendments in this update are effective for fiscal years, and interim periods within those years, beginning after December 15, 2017. The Company is currently evaluating the impact on the consolidated financial statements and related disclosures.

In February 2016, the FASB issued an update (ASU No. 2016-02, Leases) creating FASB Topic 842, Leases. The guidance is intended to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and requiring more disclosures related to leasing transactions. The amendments in this update are effective for fiscal years, and interim periods within those years, beginning after December 15, 2018. Early adoption is permitted. The Company is currently evaluating the impact on the consolidated financial statements and related disclosures.

In March 2016, the FASB issued an update (ASU No. 2016-08, Revenue from Contracts with Customers: Principal versus Agent Considerations.) The amendments in this update affect the guidance in ASU 2014-09, Revenue from Contracts with Customers. The amendments do not change the core principal of the guidance, but rather clarify the implementation guidance on principal versus agent considerations. The amendments in this update are effective for fiscal years, and interim periods within those years, beginning after December 15, 2017. The Company is currently evaluating the impact on the consolidated financial statements and related disclosures.

In March 2016, the FASB issued an update (ASU No. 2016-09, Stock Compensation: Improvements to Employee Share-Based Payment Accounting.) The guidance in this update affects any entity that issues share-based payment awards to its employees and is intended to simplify several aspects of the accounting for share-based payment awards including income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. The amendments in this update are effective for fiscal years, and interim periods within those years, beginning after December 15, 2016. Early adoption is permitted. The Company is currently evaluating the impact on the consolidated financial statements and related disclosures.

In June 2016, the FASB issued an update (ASU No. 2016-13, Financial Instruments: Credit Losses.) The guidance affects entities holding financial assets and net investment in leases that are not accounted for at fair value through net income. The amendments in this update require timelier recording of credit losses on loans and other financial instruments and are effective for fiscal years, and interim periods within those years, beginning after December 15, 2019. Early adoption is permitted for fiscal years beginning after December 15, 2018. The Company is currently evaluating the impact on the consolidated financial statements and related disclosures.

On June 16, 2016, the Company entered into an Agreement and Plan of Merger (the “Merger Agreement”) with South State Corporation, a South Carolina corporation (“South State”). The Merger Agreement provides that, upon the terms and subject to the conditions set forth therein, the Company will merge with and into South State (the “Merger”), with South State as the surviving corporation in the Merger. Immediately following the Merger, the Company’s wholly-owned subsidiary bank, Georgia Bank & Trust Company of Augusta (“Georgia Bank & Trust”), will merge with and into South State’s wholly-owned subsidiary bank, South State Bank (the “Bank Merger”), with South State Bank as the surviving entity in the Bank Merger. The Merger is subject to, among other things, regulatory approval and other customary closing conditions and is expected to close in the first quarter of 2017.