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Note 15 - Stockholders' Equity and Regulatory Requirements (Details Textual) | Dec. 31, 2024
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Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets, Percentage | 3.61%
Total Risk Based Capital Ratio | 3.10%

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- Definition Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets. + References No definition available. + Details
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Namespace Prefix: | cnob_
Data Type: | dtr-types:percentItemType
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Period Type: | instant

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- Definition Total risk based capital ratio. + References No definition available. + Details
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Namespace Prefix: | cnob_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant