Significant Accounting Policies (Policies)	9 Months Ended
Sep. 30, 2023
Accounting Policies [Abstract]
Nature of Operations [Policy Text Block]	*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) 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 24 other banking offices. 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 its loans is dependent on the conversion of assets, cash flows generated from the borrowers’ business, real estate rental and consumer wages.
Basis of Accounting, Policy [Policy Text Block]	*Basis of Presentation and Principles of Consolidation* The consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles. The consolidated financial statements of the Parent Corporation are prepared on an accrual basis and include the accounts of the Parent Corporation and the Company. All significant intercompany accounts and transactions have been eliminated from the accompanying consolidated financial statements.
Segment Reporting, Policy [Policy Text Block]	*Segments* FASB ASC 28, “Segment Reporting,” requires companies to report certain information about operating segments. The Company is managed as one segment: a community bank. All decisions including but not limited to loan growth, deposit funding, interest rate risk, credit risk and pricing are determined after assessing the effect on the totality of the organization. For example, loan growth is dependent on the ability of the organization to fund this growth through deposits or other borrowings. As a result, the Company is managed as one operating segment.
Use of Estimates, Policy [Policy Text Block]	*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.
Risks and Uncertainties [Policy Text Block]	*Risks and Uncertainties* The United States economy is currently experiencing a level of price inflation not experienced since the late 1970’s and early 1980’s. It is therefore difficult to predict the response of consumers and businesses to this level of inflation, and its impact on the economy. In addition, in order to attempt to control and reduce the level of inflation, the Federal Reserve has embarked on a series of interest rate increases along with quantitative tightening to further constrict economic conditions. It is unclear whether the Federal Reserve’s efforts will be successful, and what impact they may have on the United States’ economy. It is possible that the combined effects of inflation and increases in market interest rates could cause the economy of the United States to enter a recession, which could negatively affect the businesses of our borrowers and their ability to repay their loans or need credit, which could negatively affect our results of operations.
New Accounting Pronouncements, Policy [Policy Text Block]	Adoption of New Accounting Standards in 2023 In March 2022, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2022-02, “Financial Instruments – Credit Losses (Topic 326), Troubled Debt Restructurings and Vintage Disclosures” (“ASU 2022-02”). ASU 2022-02 eliminates the accounting guidance for troubled debt restructurings (“TDRs”) in ASC 310-40, “Receivables - Troubled Debt Restructurings by Creditors” for entities that have adopted the current expected credit loss (“CECL”) model introduced by ASU 2016-13, “Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments” (ASU 2016-13”). ASU 2022-02 also requires that public business entities disclose current-period gross charge-offs by year of origination for financing receivables and net investments in leases within the scope of Subtopic 326-20, “Financial Instruments—Credit Losses—Measured at Amortized Cost”. ASU 2022-02 is effective for the Company for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years, with early adoption permitted. We adopted ASU 2022-02 on January 1, 2023 and it did not have a material effect on the Company’s consolidated financial statements. **Newly Issued, But Not* Yet Effective Accounting Standards*** In June 2022, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2022-03, “Fair Value Measurement (Topic 820): Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions” (“ASU 2022-03”). ASU 2022-03 clarifies that a contractual restriction on the sale of an equity security is not considered part of the unit of account of the equity security and, therefore, is not considered in measuring fair value. ASU 2022-03 is effective for the Company for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years, with early adoption permitted. The Company is evaluating the effect that ASU 2022-03 will have on its consolidated financial statements.

Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2023

Nature of Operations [Policy Text Block]

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) 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 24 other banking offices. 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 its loans is dependent on the conversion of assets, cash flows generated from the borrowers’ business, real estate rental and consumer wages.

Basis of Accounting, Policy [Policy Text Block]

Basis of Presentation and Principles of Consolidation

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

Segment Reporting, Policy [Policy Text Block]

Segments

FASB ASC 28, “Segment Reporting,” requires companies to report certain information about operating segments. The Company is managed as one segment: a community bank. All decisions including but not limited to loan growth, deposit funding, interest rate risk, credit risk and pricing are determined after assessing the effect on the totality of the organization. For example, loan growth is dependent on the ability of the organization to fund this growth through deposits or other borrowings. As a result, the Company is managed as one operating segment.

Use of Estimates, Policy [Policy Text Block]

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.

Risks and Uncertainties [Policy Text Block]

Risks and Uncertainties

The United States economy is currently experiencing a level of price inflation not experienced since the late 1970’s and early 1980’s. It is therefore difficult to predict the response of consumers and businesses to this level of inflation, and its impact on the economy. In addition, in order to attempt to control and reduce the level of inflation, the Federal Reserve has embarked on a series of interest rate increases along with quantitative tightening to further constrict economic conditions. It is unclear whether the Federal Reserve’s efforts will be successful, and what impact they may have on the United States’ economy. It is possible that the combined effects of inflation and increases in market interest rates could cause the economy of the United States to enter a recession, which could negatively affect the businesses of our borrowers and their ability to repay their loans or need credit, which could negatively affect our results of operations.

New Accounting Pronouncements, Policy [Policy Text Block]

Adoption of New Accounting Standards in 2023

In March 2022, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2022-02, “Financial Instruments – Credit Losses (Topic 326), Troubled Debt Restructurings and Vintage Disclosures” (“ASU 2022-02”). ASU 2022-02 eliminates the accounting guidance for troubled debt restructurings (“TDRs”) in ASC 310-40, “Receivables - Troubled Debt Restructurings by Creditors” for entities that have adopted the current expected credit loss (“CECL”) model introduced by ASU 2016-13, “Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments” (ASU 2016-13”). ASU 2022-02 also requires that public business entities disclose current-period gross charge-offs by year of origination for financing receivables and net investments in leases within the scope of Subtopic 326-20, “Financial Instruments—Credit Losses—Measured at Amortized Cost”. ASU 2022-02 is effective for the Company for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years, with early adoption permitted. We adopted ASU 2022-02 on January 1, 2023 and it did not have a material effect on the Company’s consolidated financial statements.

Newly Issued, But Not Yet Effective Accounting Standards

In June 2022, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2022-03, “Fair Value Measurement (Topic 820): Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions” (“ASU 2022-03”). ASU 2022-03 clarifies that a contractual restriction on the sale of an equity security is not considered part of the unit of account of the equity security and, therefore, is not considered in measuring fair value. ASU 2022-03 is effective for the Company for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years, with early adoption permitted. The Company is evaluating the effect that ASU 2022-03 will have on its consolidated financial statements.

- Definition

Disclosure of accounting policy for segment reporting.

+ References + Details