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Basis of Presentation (Policies) | 9 Months Ended
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Sep. 30, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Consolidation | The consolidated financial statements include the accounts of: OceanFirst Financial Corp. (the “Company”); its wholly-owned subsidiaries, OceanFirst Bank N.A. (the “Bank”) and OceanFirst Risk Management, Inc.; the Bank’s direct and indirect wholly-owned subsidiaries, OceanFirst REIT Holdings, Inc., OceanFirst Management Corp., OceanFirst Realty Corp., Casaba Real Estate Holdings Corporation, Country Property Holdings, Inc., OFB Acquisition LLC; Spring Garden Capital Group, LLC (and its subsidiaries), and a majority controlling interest in Trident Abstract Title Agency, LLC (“Trident”). All significant intercompany accounts and transactions have been eliminated in consolidation.
Segment Reporting | Segment Reporting The Company’s operations are solely in the financial services industry and provide a range of regional community banking services to retail and commercial customers. The Company operates throughout New Jersey and in the major metropolitan areas between Massachusetts and Virginia. Operating segments are defined as components of an entity for which separate financial information is available and is regularly reviewed by the chief operating decision maker (“CODM”). The CODM makes operating decisions and manages the activities of the business on a consolidated basis. Therefore, management concluded the Company has a single operating segment, and therefore one reportable segment. Further, the CODM allocates resources and assesses performance based on an ongoing review of the Company’s consolidated financial results. Specifically, the CODM reviews net income, reported within the consolidated statements of income, along with information in the consolidated statements of financial condition, to decide whether to reinvest profits into the Company or other strategic investments. Refer to the Consolidated Statements of Financial Condition and Consolidated Statements of Income for net income and all significant expenses regularly provided to and reviewed by the CODM.

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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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