Note 1a - Nature of Operations, Principles of Consolidation and Risk and Uncertainties	9 Months Ended
Sep. 30, 2025
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	Note 1a. Nature of Operations, Principles of Consolidation and Risk and Uncertainties *Nature of Operations* ConnectOne Bancorp, Inc. (the “Parent Corporation”) is incorporated under the laws of the State of New Jersey and is a registered bank holding company under the Bank Holding Company Act of 1956, as amended (the “BHCA”). The Parent Corporation’s business currently consists of the operation of its wholly-owned subsidiary, ConnectOne Bank (the “Bank” and, collectively with the Parent Corporation and the Parent Corporation’s subsidiaries, the “Company”) and making certain limited investments. The Bank’s direct and indirect subsidiaries include Union Investment Co. (a New Jersey investment company), Twin Bridge Investment Co. (a Delaware investment company), ConnectOne Preferred Funding Corp. (a New Jersey real estate investment trust), Center Financial Group, LLC (a New Jersey financial services company), Center Advertising, Inc. (a New Jersey advertising company), Morris Property Company, LLC, (a New Jersey limited liability company), Volosin Holdings, LLC, (a New Jersey limited liability company), NJCB Spec-1, LLC (a New Jersey limited liability company), Port Jervis Holdings, LLC (a New Jersey limited liability company), BONJ Special Properties, LLC (a New Jersey limited liability company), The First of Long Island REIT (a New York real estate investment trust), FNY Service Corp (a New York investment company) and BoeFly, Inc. (a New Jersey financial technology company). The Bank is a community-based, full-service New Jersey-chartered commercial bank that was founded in 2005. The Bank operates from its headquarters located at 301 Sylvan Avenue in the Borough of Englewood Cliffs, Bergen County, New Jersey and through its 59 other banking offices. On June 1, 2025, the Company completed its acquisition of The First of Long Island Corporation (“FLIC”), and The First National Bank of Long Island ("FNBLI"), FLIC’s wholly owned subsidiary depository institution, was merged into the Bank. See Note 2. Substantially all loans are secured with various types of collateral, including business assets, consumer assets and commercial/residential real estate. Each borrower’s ability to repay their loans is dependent on the conversion of assets, cash flows generated from the borrowers’ business, real estate rental and consumer wages. *Basis of Presentation and Principles of Consolidation* The consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles ("GAAP"). The consolidated financial statements of the Parent Corporation are prepared on an accrual basis and include the accounts of the Parent Corporation and the Bank. All significant intercompany accounts and transactions have been eliminated from the accompanying consolidated financial statements. *Segment Reporting* The Company’s operations are solely in the financial services industry. The Company provides a range of regional community banking services to commercial and retail clients. The Company's reportable segment is determined by the Chief Executive Officer, who is designated the Chief Operating Decision Maker ("CODM"), based upon information about the Company's products and services offered, primarily its banking operations. The segment is also distinguished by the level of information provided to the CODM, who uses such information to review performance of various components of the business (such as branches and the subsidiary bank), which are then aggregated if operating performance, products/services, and customers are similar. The CODM will evaluate the financial performance of the Company's business components such as by evaluating revenue streams, significant expenses, and budget to actual results in assessing the Company's segment and in the determination of allocating resources. The CODM uses revenue streams to evaluate product pricing and significant expenses to assess performance and evaluate return on assets. The CODM uses consolidated net income to benchmark the Company against its competitors. The benchmarking analysis coupled with monitoring of budget to actual results are used in assessment of performance and in establishing compensation. Loans, investments, and deposits provide the revenues in the banking operation. Interest expense, provision for credit losses, and payroll provide the significant expenses in the banking operation. All operations are domestic. See Note 14 for disclosures related to the reportable segment. *Employee Benefit Plans* The Company has a noncontributory pension plan that covered all eligible employees up until September 30, 2007, at which time the Company froze its defined benefit pension plan. As such, all future benefit accruals in this pension plan were discontinued and all retirement benefits that employees would have earned as of September 30, 2007 were preserved. In the FLIC merger, the Company acquired a defined benefit pension plan that covered all former eligible FLIC employees. The Bank made contributions to the plan, which together with participant contributions equal to 2% of their compensation, fund these benefits. Effective September 30, 2025, the plan was frozen and all retirement benefits that employees earned through that date were preserved. The Company’s policy is to fund at least the minimum contribution required by the Employee Retirement Income Security Act of 1974. Pension expense is the sum of service cost, interest cost, amortization of actuarial gains and losses and plan expenses, net of the expected return on plan assets and participant contributions. The costs associated with the plans are accrued based on actuarial assumptions and included in salaries and employee benefits expense. The Company accounts for its defined benefit pension plans in accordance with Financial Accounting Standards Board ("FASB") Accounting Standard Codification ("ASC") 715-30. This standard requires that the funded status of defined benefit postretirement plans be recognized on the Company’s statement of financial condition and changes in the funded s tatus be reflected in other comprehensive income ("OCI"). This standard also requires companies to measure the funded status of the plans as of the date of the company's fiscal year-end. *Use of Estimates* In preparing the consolidated financial statements, management has made estimates and assumptions that affect the reported amounts of assets and liabilities as of the dates of the consolidated statements of condition and that affect the results of operations for the periods presented. Actual results could differ significantly from those estimates. Reclassifications Certain reclassifications have been made to amounts reported in prior periods to conform to the current period presentation. The reclassifications had no material effect on net income or total stockholders' equity. Adoption of New Accounting Standards in 2025 In December 2023, the FASB issued Accounting Standard Update ("ASU") 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. These amendments require that public business entities on an annual basis (1) disclose specific categories in the rate reconciliation and (2) provide additional information for reconciling items that meet a quantitative threshold (if the effect of those reconciling items is equal to or greater than 5% of the amount computed by multiplying pretax income (or loss) by the applicable statutory income tax rate). The amendments require that all entities disclose on an annual basis the following information about income taxes paid: 1) The amount of income taxes paid (net of refunds received) disaggregated by federal (national), state, and foreign taxes; and 2) The amount of income taxes paid (net of refunds received) disaggregated by individual jurisdictions in which income taxes paid (net of refunds received) is equal to or greater than 5% of total income taxes paid (net of refunds received). The amendments also require that all entities disclose the following information: 1) Income (or loss) from continuing operations before income tax expense (or benefit) disaggregated between domestic and foreign; and 2) Income tax expense (or benefit) from continuing operations disaggregated by federal (national), state, and foreign. The Company adopted ASU 2023-09 on January 1, 2025. *Newly Issued, But* *Not* *Yet Effective Accounting Standards* In November 2024, the FASB issued ASU 2024-03, "Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40)" ("ASU 2024-03"). ASU 2024-03 requires public entities to provide disaggregated disclosures, in the notes to the financial statements, of certain categories of expenses that are included in expense line items on the face of the income statement. ASU 2024-03 is effective for the Company on January 1, 2027. The Company is currently not expecting the ASU to have a material effect on the consolidated financial statements and footnotes.

Note 1a - Nature of Operations, Principles of Consolidation and Risk and Uncertainties

9 Months Ended

Sep. 30, 2025

Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]

Note 1a. Nature of Operations, Principles of Consolidation and Risk and Uncertainties

Nature of Operations

ConnectOne Bancorp, Inc. (the “Parent Corporation”) is incorporated under the laws of the State of New Jersey and is a registered bank holding company under the Bank Holding Company Act of 1956, as amended (the “BHCA”). The Parent Corporation’s business currently consists of the operation of its wholly-owned subsidiary, ConnectOne Bank (the “Bank” and, collectively with the Parent Corporation and the Parent Corporation’s subsidiaries, the “Company”) and making certain limited investments. The Bank’s direct and indirect subsidiaries include Union Investment Co. (a New Jersey investment company), Twin Bridge Investment Co. (a Delaware investment company), ConnectOne Preferred Funding Corp. (a New Jersey real estate investment trust), Center Financial Group, LLC (a New Jersey financial services company), Center Advertising, Inc. (a New Jersey advertising company), Morris Property Company, LLC, (a New Jersey limited liability company), Volosin Holdings, LLC, (a New Jersey limited liability company), NJCB Spec-1, LLC (a New Jersey limited liability company), Port Jervis Holdings, LLC (a New Jersey limited liability company), BONJ Special Properties, LLC (a New Jersey limited liability company), The First of Long Island REIT (a New York real estate investment trust), FNY Service Corp (a New York investment company) and BoeFly, Inc. (a New Jersey financial technology company).

The Bank is a community-based, full-service New Jersey-chartered commercial bank that was founded in 2005. The Bank operates from its headquarters located at 301 Sylvan Avenue in the Borough of Englewood Cliffs, Bergen County, New Jersey and through its 59 other banking offices. On June 1, 2025, the Company completed its acquisition of The First of Long Island Corporation (“FLIC”), and The First National Bank of Long Island ("FNBLI"), FLIC’s wholly owned subsidiary depository institution, was merged into the Bank. See Note 2.

Substantially all loans are secured with various types of collateral, including business assets, consumer assets and commercial/residential real estate. Each borrower’s ability to repay their loans is dependent on the conversion of assets, cash flows generated from the borrowers’ business, real estate rental and consumer wages.

Basis of Presentation and Principles of Consolidation

The consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles ("GAAP"). The consolidated financial statements of the Parent Corporation are prepared on an accrual basis and include the accounts of the Parent Corporation and the Bank. All significant intercompany accounts and transactions have been eliminated from the accompanying consolidated financial statements.

Segment Reporting

The Company’s operations are solely in the financial services industry. The Company provides a range of regional community banking services to commercial and retail clients.

The Company's reportable segment is determined by the Chief Executive Officer, who is designated the Chief Operating Decision Maker ("CODM"), based upon information about the Company's products and services offered, primarily its banking operations. The segment is also distinguished by the level of information provided to the CODM, who uses such information to review performance of various components of the business (such as branches and the subsidiary bank), which are then aggregated if operating performance, products/services, and customers are similar. The CODM will evaluate the financial performance of the Company's business components such as by evaluating revenue streams, significant expenses, and budget to actual results in assessing the Company's segment and in the determination of allocating resources. The CODM uses revenue streams to evaluate product pricing and significant expenses to assess performance and evaluate return on assets. The CODM uses consolidated net income to benchmark the Company against its competitors. The benchmarking analysis coupled with monitoring of budget to actual results are used in assessment of performance and in establishing compensation. Loans, investments, and deposits provide the revenues in the banking operation. Interest expense, provision for credit losses, and payroll provide the significant expenses in the banking operation. All operations are domestic. See Note 14 for disclosures related to the reportable segment.

Employee Benefit Plans

The Company has a noncontributory pension plan that covered all eligible employees up until September 30, 2007, at which time the Company froze its defined benefit pension plan. As such, all future benefit accruals in this pension plan were discontinued and all retirement benefits that employees would have earned as of September 30, 2007 were preserved.

In the FLIC merger, the Company acquired a defined benefit pension plan that covered all former eligible FLIC employees. The Bank made contributions to the plan, which together with participant contributions equal to 2% of their compensation, fund these benefits. Effective September 30, 2025, the plan was frozen and all retirement benefits that employees earned through that date were preserved.

The Company’s policy is to fund at least the minimum contribution required by the Employee Retirement Income Security Act of 1974. Pension expense is the sum of service cost, interest cost, amortization of actuarial gains and losses and plan expenses, net of the expected return on plan assets and participant contributions. The costs associated with the plans are accrued based on actuarial assumptions and included in salaries and employee benefits expense.

The Company accounts for its defined benefit pension plans in accordance with Financial Accounting Standards Board ("FASB") Accounting Standard Codification ("ASC") 715-30. This standard requires that the funded status of defined benefit postretirement plans be recognized on the Company’s statement of financial condition and changes in the funded s

tatus be reflected in other comprehensive income ("OCI"). This standard also requires companies to measure the funded status of the plans as of the date of the company's fiscal year-end.

Use of Estimates

In preparing the consolidated financial statements, management has made estimates and assumptions that affect the reported amounts of assets and liabilities as of the dates of the consolidated statements of condition and that affect the results of operations for the periods presented. Actual results could differ significantly from those estimates.

Reclassifications

Certain reclassifications have been made to amounts reported in prior periods to conform to the current period presentation. The reclassifications had no material effect on net income or total stockholders' equity.

Adoption of New Accounting Standards in 2025

In December 2023, the FASB issued Accounting Standard Update ("ASU") 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. These amendments require that public business entities on an annual basis (1) disclose specific categories in the rate reconciliation and (2) provide additional information for reconciling items that meet a quantitative threshold (if the effect of those reconciling items is equal to or greater than 5% of the amount computed by multiplying pretax income (or loss) by the applicable statutory income tax rate). The amendments require that all entities disclose on an annual basis the following information about income taxes paid: 1) The amount of income taxes paid (net of refunds received) disaggregated by federal (national), state, and foreign taxes; and 2) The amount of income taxes paid (net of refunds received) disaggregated by individual jurisdictions in which income taxes paid (net of refunds received) is equal to or greater than 5% of total income taxes paid (net of refunds received). The amendments also require that all entities disclose the following information: 1) Income (or loss) from continuing operations before income tax expense (or benefit) disaggregated between domestic and foreign; and 2) Income tax expense (or benefit) from continuing operations disaggregated by federal (national), state, and foreign. The Company adopted ASU 2023-09 on January 1, 2025.

Newly Issued, But Not Yet Effective Accounting Standards

In November 2024, the FASB issued ASU 2024-03, "Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40)" ("ASU 2024-03"). ASU 2024-03 requires public entities to provide disaggregated disclosures, in the notes to the financial statements, of certain categories of expenses that are included in expense line items on the face of the income statement. ASU 2024-03 is effective for the Company on January 1, 2027. The Company is currently not expecting the ASU to have a material effect on the consolidated financial statements and footnotes.