Description of Business, Basis of Presentation and Significant Accounting Policies and Recently Issued Accounting Pronouncements	6 Months Ended
Jun. 30, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business, Basis of Presentation and Significant Accounting Policies and Recently Issued Accounting Pronouncements	Description of Business, Basis of Presentation, Significant Accounting Policies and Recently Issued Accounting Pronouncements (a) Description of Business The Company is primarily engaged in the business of planning, directing and coordinating the business activities of its wholly-owned subsidiary, the Bank. The Bank is headquartered in Olympia, Washington and conducts business from its branch offices located throughout Washington state, the greater Portland, Oregon area, Eugene, Oregon, and Boise, Idaho. The Bank’s business consists primarily of commercial lending and deposit relationships with small and medium-sized businesses and their owners in its market areas and attracting deposits from the general public. The Bank also makes real estate construction and land development loans and consumer loans and originates home equity loans on residential properties primarily located in its market areas. The Bank's deposits are insured by the FDIC, subject to applicable limitations. (b) Basis of Presentation The accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with GAAP for interim financial information and pursuant to the rules and regulations of the SEC. Accordingly, they do not include all the information and footnotes required by GAAP for complete financial statements. It is recommended these unaudited Condensed Consolidated Financial Statements and accompanying Notes be read with the audited Consolidated Financial Statements and the accompanying Notes included in the 2025 Annual Form 10-K. In management's opinion, all adjustments (consisting only of normal recurring adjustments) considered necessary for a fair presentation have been included. Operating results for the three and six months ended June 30, 2026 are not necessarily indicative of the results that may be expected for the year ending December 31, 2026. On January 31, 2026, the Company completed its acquisition of Olympic (the "Merger"), a bank holding company headquartered in Port Orchard, Washington, and its subsidiary bank Kitsap Bank. The Company's financial results for periods ended prior to January 31, 2026 reflect only Heritage's standalone operations and are not directly comparable to the consolidated results for periods following the completion of the acquisition. The accompanying Condensed Consolidated Financial Statements presented for the year ended December 31, 2025 were derived from audited financial statements and do not include all disclosures required by GAAP. To prepare unaudited Condensed Consolidated Financial Statements in conformity with GAAP, management makes estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the financial statements and the disclosures provided. Management believes the judgments, estimates and assumptions used in the preparation of the unaudited Condensed Consolidated Financial Statements are appropriate based on the facts and circumstances at the time. Actual results, however, could differ significantly from those estimates. Material estimates that are particularly susceptible to significant change relate to management's estimate of the ACL on investment securities, management's estimate of the ACL on loans, management's estimate of the ACL on unfunded commitments, management's evaluation of goodwill impairment and management's estimate of the fair value of financial instruments. Estimates related to acquired loans and intangible assets require significant judgment, including discount rates, expected cash flows, and credit loss assumptions. The accompanying unaudited Condensed Consolidated Financial Statements include the accounts of the Company and its wholly-owned subsidiary, the Bank. All significant intercompany balances and transactions among the Company and the Bank have been eliminated in consolidation. (c) Significant Accounting Policies The significant accounting policies used in preparation of the unaudited Condensed Consolidated Financial Statements are disclosed in greater detail in the 2025 Annual Form 10-K. In conjunction with the Merger, the Company early adopted ASU 2025-08 Financial Instruments-Credit Losses: Purchased Loans as discussed below. There have not been any other material changes in the Company's significant accounting policies during the six months ended June 30, 2026 from those contained in the 2025 Annual Form 10-K. (d) Recently Issued or Adopted Accounting Pronouncements FASB ASU 2023-06, Disclosure Improvements: Codification Amendments in Response to the SEC's Disclosure Update and Simplification Initiative, was issued in October 2023 to clarify or improve disclosure and presentation requirements on a variety of topics and align the requirements in the FASB accounting standard codification with SEC regulations. The amendments will be effective for the Company only if the SEC removes the related disclosure requirement from its existing regulations no later than June 30, 2027. If the SEC timely removes such related requirement from its existing regulations, the corresponding amendments within the ASU will become effective for the Company on the same date with early adoption permitted. The Company does not expect the adoption of this ASU to have a material impact on its business operations or Consolidated Statements of Financial Condition.

The Company is primarily engaged in the business of planning, directing and coordinating the business activities of its wholly-owned subsidiary, the Bank. The Bank is headquartered in Olympia, Washington and conducts business from its branch offices located throughout Washington state, the greater Portland, Oregon area, Eugene, Oregon, and Boise, Idaho. The Bank’s business consists primarily of commercial lending and deposit relationships with small and medium-sized businesses and their owners in its market areas and attracting deposits from the general public. The Bank also makes real estate construction and land development loans and consumer loans and originates home equity loans on residential properties primarily located in its market areas. The Bank's deposits are insured by the FDIC, subject to applicable limitations.

The accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with GAAP for interim financial information and pursuant to the rules and regulations of the SEC. Accordingly, they do not include all the information and footnotes required by GAAP for complete financial statements. It is recommended these unaudited Condensed Consolidated Financial Statements and accompanying Notes be read with the audited Consolidated Financial Statements and the accompanying Notes included in the 2025 Annual Form 10-K. In management's opinion, all adjustments (consisting only of normal recurring adjustments) considered necessary for a fair presentation have been included. Operating results for the three and six months ended June 30, 2026 are not necessarily indicative of the results that may be expected for the year ending December 31, 2026.

On January 31, 2026, the Company completed its acquisition of Olympic (the "Merger"), a bank holding company headquartered in Port Orchard, Washington, and its subsidiary bank Kitsap Bank. The Company's financial results for periods ended prior to January 31, 2026 reflect only Heritage's standalone operations and are not directly comparable to the consolidated results for periods following the completion of the acquisition.

To prepare unaudited Condensed Consolidated Financial Statements in conformity with GAAP, management makes estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the financial statements and the disclosures provided. Management believes the judgments, estimates and assumptions used in the preparation of the unaudited Condensed Consolidated Financial Statements are appropriate based on the facts and circumstances at the time. Actual results, however, could differ significantly from those estimates. Material estimates that are particularly susceptible to significant change relate to management's estimate of the ACL on investment securities, management's estimate of the ACL on loans, management's estimate of the ACL on unfunded commitments, management's evaluation of goodwill impairment and management's estimate of the fair value of financial instruments. Estimates related to acquired loans and intangible assets require significant judgment, including discount rates, expected cash flows, and credit loss assumptions.

The accompanying unaudited Condensed Consolidated Financial Statements include the accounts of the Company and its wholly-owned subsidiary, the Bank. All significant intercompany balances and transactions among the Company and the Bank have been eliminated in consolidation.

The significant accounting policies used in preparation of the unaudited Condensed Consolidated Financial Statements are disclosed in greater detail in the 2025 Annual Form 10-K. In conjunction with the Merger, the Company early adopted ASU 2025-08 Financial Instruments-Credit Losses: Purchased Loans as discussed below. There have not been any other material changes in the Company's significant accounting policies during the six months ended June 30, 2026 from those contained in the 2025 Annual Form 10-K.

FASB ASU 2023-06, Disclosure Improvements: Codification Amendments in Response to the SEC's Disclosure Update and Simplification Initiative, was issued in October 2023 to clarify or improve disclosure and presentation requirements on a variety of topics and align the requirements in the FASB accounting standard codification with SEC regulations. The amendments will be effective for the Company only if the SEC removes the related disclosure requirement from its existing regulations no later than June 30, 2027. If the SEC timely removes such related requirement from its existing regulations, the corresponding amendments within the ASU will become effective for the Company on the same date with early adoption permitted. The Company does not expect the adoption of this ASU to have a material impact on its business operations or Consolidated Statements of Financial Condition.