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Summary of Significant Accounting Policies (Policies) | 6 Months Ended
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Jun. 30, 2012
Summary of Signficant Accounting Policies |
Nature of Operations [Text Block] | General Auburn National Bancorporation, Inc. (the “Company”) provides a full range of banking services to individual and corporate customers in Lee County, Alabama and surrounding counties through its wholly owned subsidiary, AuburnBank (the “Bank”). The Company does not have any segments other than banking that are considered material.
Basis of Accounting [Text Block] | Basis of Presentation and Use of Estimates The unaudited condensed consolidated financial statements in this report have been prepared in accordance with U.S. generally accepted accounting principles for interim financial information. Accordingly, these financial statements do not include all of the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements. The unaudited condensed consolidated financial statements include, in the opinion of management, all adjustments necessary to present a fair statement of the financial position and the results of operations for all periods presented. All such adjustments are of a normal recurring nature. The results of operations in the interim statements are not necessarily indicative of the results of operations that the Company and its subsidiaries may achieve for future interim periods or the entire year. For further information, refer to the consolidated financial statements and footnotes included in the Company's annual report on Form 10-K for the year ended December 31, 2011.
Use of Estimates, Policy [Policy Text Block] | The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities as of the balance sheet date and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change in the near term include other-than-temporary impairment on investment securities, the determination of the allowance for loan losses, fair value of fina ncial instruments, and the valuation of deferred tax assets and other real estate owned.
Reclassifications [Text Block] | Reclassifications Certain amounts reported in prior periods have been reclassified to conform to the current-period presentation. These reclassifications had no effect on the Company's previously reported net earnings or total stockholders' equity.
Subsequent Events, Policy [Policy Text Block] | Subsequent Events The Company has evaluated the effects of events or transactions through the date of this filing that have occurred subsequent to June 30, 2012. The Company does not believe there are any material subsequent events that would require further recognition or disclosure.
New Accounting Pronouncements Policy [Policy Text Block] | Accounting Developments In the first quarter of 2012, the Company adopted new guidance related to t he following Codification topic s: ASU 2011-03, Transfers and Servicing: Reconsideration of Effective Control for Repurchase Agreements; ASU 2011-04, Fair Value Measurement: Amendments to Achieve Common Fair Value Measurement and Disclosure; ASU 2011-05, Comprehensive Income: Presentation of Comprehensive Income; and ASU 2011-12, Deferral of the Effective Date for Amendments to the Presentation of Reclassifications of Items Out of Accumulated Other Comprehensive Income in Accounting; and Standards Update No. 2011-05. Information about these pronouncements are described in more detail below. ASU 2011-03, Transfers and Servicing: Reconsideration of Effective Control for Repurchase Agreements, removes from the assessment of effective control the criterion relating to the transferor's ability to repurchase or redeem financial assets on substantially the agreed-upon terms, even if the transferee were to default. The requirement to demonstrate that the transferor possesses adequate collateral to fund substantially all the cost of purchasing replacement assets is also eliminated. The amendments in this ASU were effective for interim and annual periods beginning after December 31, 2011, with prospective application to transactions or modifications of existing transactions that occur on or after the effective date. Adoption of this ASU did not have a sign ificant impact on the financial statement s of the Company. ASU 2011-04, Fair Value Measurement: Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRS, outlines the collaborative effort of the Financial Accounting Standards Board (FASB) and the International Accounting Standards Board (“IASB”) to consistently define fair value and to come up with a set of consistent disclosures for fair value. The ASU changes certain fair value measurement principles and enhances the disclosure requirements particularly for level 3 fair val ue measurements. This Update was effective for the Company in the first quarter of 2012 and will be applied prospectively. Adoption of the ASU required expanded disclosure of the Company's fair value disclosures. See Note 8, Fair Value. ASU 2011-05, Comprehensive Income: Presentation of Comprehensive Income, amends existing standards allowing either a single continuous stateme nt of comprehensive income or two separate but consecutive statements. An entity is required to present each component of net income along with total net income, each component of other comprehensive income along with a total for other comprehensive income, and a total amount for comprehensive income in both options. This Update also requires companies to present amounts reclassified out of other comprehensive income and into net income on the face of the statement of income. In December 2011, the FASB issued ASU 2011-12, Deferral of the Effective Date for Amendments to the Presentation of Reclassifications of Items Out of Accumulated Other Comprehensive Income in Accounting Standards Update No. 2011-05, which defers indefinitely the requirement to present reclassification adjustments on the statement of income. T he remaining provisions were effective for the Company in the first quarter of 2012 with retrospective application. Adoption of the ASU required the Company to add a statement of comprehensive income. See Consolidated Statement s of Comprehensive Income.

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- Definition The entire disclosure for the nature of an entity's business, the major products or services it sells or provides and its principal markets, including the locations of those markets. If the entity operates in more than one business, the disclosure also indicates the relative importance of its operations in each business and the basis for the determination (for example, assets, revenues, or earnings). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Name Statement of Position (SOP) -Publisher AICPA -Number 94-6 -Paragraph 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6003-108592 + Details
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- Definition The entire disclosure for classifying current financial statements, which may be different from classifications in the prior year's financial statements. Disclose any material changes in classification including an explanation of the reason for the change and the areas impacted. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Chapter 2 -Section A -Paragraph 2 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6359566&loc=d3e326-107755 + Details
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- Definition Disclosure of accounting policy for the use of estimates in the preparation of financial statements in conformity with generally accepted accounting principles. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6061-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 94-6 -Paragraph 11, 14 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6143-108592 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6132-108592 + Details
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