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Significant Accounting Policies (Policies) | 3 Months Ended
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Mar. 31, 2026
Accounting Policies [Abstract] |
Basis of Presentation and Use of Estimates [Policy Text Block] | Basis of Financial Statement Presentation and Use of Estimates The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) for interim financial information and in accordance with the instructions to Form 10-Q and Article 10 of Regulation S-X as promulgated by the Securities and Exchange Commission (“SEC”). It is recommended that these unaudited interim condensed consolidated financial statements be read in conjunction with the Company’s Annual Report on Form 10-K with all of the audited information and footnotes required by U.S. GAAP for complete financial statements for the year ended December 31, 2025, as filed with the SEC on March 9, 2026. In the opinion of management, all normal adjustments and recurring accruals considered necessary for a fair presentation of the financial position and results of operations for the periods presented have been included. The results of operations for the three-month period ended March 31, 2026 are not necessarily indicative of the results to be expected for the year ending December 31, 2026 or any other period. In preparing condensed consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the condensed consolidated statement of financial condition and reported amounts of revenues and expenses during the reporting period. Actual results could differ from estimates. Material estimates that are particularly susceptible to significant change in the near term relate to the determination of the allowance for credit losses ("ACL"), mortgage servicing rights, the fair value of financial instruments, the valuation of goodwill and deferred tax assets and liabilities.
Consolidation, Policy [Policy Text Block] | Principles of Consolidation The condensed consolidated financial statements include Eagle, the Bank, OHF, Eagle Bancorp Statutory Trust I (the “Trust”) and OFS. All significant intercompany transactions and balances have been eliminated in consolidation.
Subsequent Events, Policy [Policy Text Block] | Subsequent Events The Company has evaluated events and transactions subsequent to March 31, 2026 for recognition and/or disclosure.
Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] | Goodwill Goodwill is recorded upon completion of a business combination as the difference between the purchase price and the fair value of net identifiable assets acquired. Subsequent to initial recognition, the Company tests goodwill for impairment annually as of October 31, or more often if events or circumstances, such as adverse changes in the business climate indicate there may be impairment. A goodwill impairment test is performed by comparing the fair value of the reporting unit with its carrying value. An impairment charge is recorded for the amount by which thy carrying amount exceeds the reporting unit’s fair value. For goodwill considerations the Company is a single reporting unit. Our quantitative annual impairment test as of October 31, 2025 did not result in impairment. The annual goodwill impairment test for 2026 will be performed as of October 31.
Segment Reporting, Policy [Policy Text Block] | Segment Reporting Management considers operations to be aggregated in one operating segment, as well as one reportable segment. The Company operates as one line of business (community banking) by providing a similar base of commercial and retail customers with comparable product and service offerings throughout our Montana markets. The President/Chief Executive Officer (“CEO”) serves as the Company’s chief operating decision maker (“CODM”). The CODM is responsible for assessing performance and allocating operating and capital expenditure resources. The CODM regularly assesses the performance of the single operating and reporting segment based on consolidated net income. The CODM reviews expenses at a level consistent with those reported in the Company’s consolidated statements of income. All significant expense categories are reflected in the consolidated statements of income. The measure of segment assets is reflected in the consolidated statements of financial condition as total assets.
New Accounting Pronouncements, Policy [Policy Text Block] | Recently Adopted Accounting Pronouncements In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. The updated accounting guidance requires enhanced income tax disclosures, including the disaggregation of existing disclosures related to the tax rate reconciliation and income taxes paid. This ASU is effective for annual periods beginning after December 15, 2024, with early adoption permitted. The amendments should be applied on a prospective basis, but retrospective application is permitted. The amendments in this ASU became effective for the Company on January 1, 2025 and did not have a significant impact on the Company’s financial position, results of operations, or liquidity. Recently Issued Accounting Pronouncements In November 2024, the FASB issued ASU No. 2024-03, Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses. This update requires that public companies disclose details about specific expenses, among other things, such as employee compensation, depreciation, amortization, depletion, and inventory purchases. This ASU is effective for annual reporting periods beginning after December 15, 2026, and interim reporting periods within fiscal years beginning after December 15, 2027, with early adoption permitted. In January 2025, the FASB issued ASU No. 2025-01, Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40), which clarifies the effective date identified under ASU No. 2024-03. The Company is currently evaluating the effect the ASU will have on its consolidated financial statements and related disclosures. In November 2025, the FASB issued ASU 2025-08, “Financial Instruments—Credit Losses (Topic 326): Purchased Loans,” which amends the accounting for acquired loans by introducing a category of purchased seasoned loans and expanding the use of the gross-up approach, requiring qualifying acquired loans to be recorded at purchase price plus an allowance for expected credit losses rather than recognizing a Day-1 provision through earnings. ASU 2025-08 is effective for annual reporting periods beginning after December 15, 2026, including interim periods within those annual periods, and is to be applied prospectively, with early adoption permitted. The Company is evaluating the impact of adoption, including the potential effect on the accounting for loans acquired in future acquisitions.

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- Definition Disclosure of accounting policy regarding (1) the principles it follows in consolidating or combining the separate financial statements, including the principles followed in determining the inclusion or exclusion of subsidiaries or other entities in the consolidated or combined financial statements and (2) its treatment of interests (for example, common stock, a partnership interest or other means of exerting influence) in other entities, for example consolidation or use of the equity or cost methods of accounting. The accounting policy may also address the accounting treatment for intercompany accounts and transactions, noncontrolling interest, and the income statement treatment in consolidation for issuances of stock by a subsidiary. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483426/235-10-50-4 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481203/810-10-50-1 + Details
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- Definition Disclosure of accounting policy for goodwill. This accounting policy also may address how an entity assesses and measures impairment of goodwill, how reporting units are determined, how goodwill is allocated to such units, and how the fair values of the reporting units are determined. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 24 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482548/350-20-55-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-20/tableOfContent + Details
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