Business and Basis of Presentation	3 Months Ended
Business and Basis of Presentation	Mar. 31, 2024
Accounting Policies [Abstract]
Business and Basis of Presentation	Business and Basis of Presentation OP Bancorp ("Company") is a California corporation and bank holding company for Open Bank (“Bank”). The Company commenced operation as a bank holding company on June 1, 2016, and substantially all of its assets, operations and business are owned and conducted through the Bank. The Bank is a California state-chartered and FDIC-insured financial institution, which began its operations on June 10, 2005. Headquartered in downtown Los Angeles, California, OP Bancorp operates primarily in the traditional banking business arena that includes accepting deposits and making loans and investments. OP Bancorp’s primary deposit products are demand and time deposits, and the primary lending products are commercial business loans to small to medium sized businesses. OP Bancorp is operating with eleven full-service branches located in California, Washington, Nevada and Texas, and four loan production offices located in California, Georgia, Washington and Colorado. The accompanying unaudited consolidated financial statements and notes thereto of the Company have been prepared by management in accordance with the rules and regulations of the Securities and Exchange Commission (“SEC”) for Form 10-Q and conform to practices within the banking industry and include all of the information and disclosures required by accounting principles generally accepted in the United States of America (“GAAP”) for interim financial reporting. The accompanying unaudited consolidated financial statements reflect all adjustments (consisting only of normal recurring adjustments), which are necessary for a fair presentation of the financial results for the interim periods presented, including eliminating intercompany transactions and balances. Certain items on the consolidated financial statements and notes for prior years have been reclassified to conform to the 2024 presentation. The results of operations for the interim periods are not necessarily indicative of the results for the full year. These interim unaudited financial statements should be read in conjunction with the consolidated financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023 (“2023 Annual Report on Form 10-K”). Descriptions of our significant accounting policies are included in Note 1. Summary of Significant Accounting Policies in the Notes to consolidated financial statements in the 2023 Annual Report on Form 10-K. New Accounting Pronouncements Adopted FASB ASU 2023-02, Investments - Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method. This ASU permits reporting entities to elect to account for tax equity investments, regardless of the tax credit program for which the income tax credits are received, using the proportional amortization method if certain conditions are met. Under the proportional amortization method, an entity amortizes the initial cost of the investment in proportion to the income tax credits and other income tax benefits received and recognizes the net amortization and income tax credits and other income tax benefits in the income statement as a component of income tax expense. A reporting entity makes an accounting policy election to apply the proportional amortization method on a tax-credit-program-by-tax-credit-program basis rather than electing to apply the proportional amortization method at the reporting entity level or to individual investments. The Company adopted ASU 2023-02 on January 1, 2024, and the adoption did not have a material impact on its consolidated financial statements. Recently Issued Accounting Pronouncement under Evaluation In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. This ASU amends the disclosure requirements for income taxes, including the requirement for further disaggregation of the income tax rate reconciliation and income taxes paid disclosures. The amendments in this guidance must be applied prospectively, with the option to apply retrospectively. This guidance is effective for fiscal years beginning after December 15, 2024. The Company is currently evaluating the impact of this new standard on its consolidated financial statements and the adoption is not expected to have a significant impact on the consolidated financial statements.