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Note 6 - Premises and Equipment - Schedule of Capital Lease in Premises and Equipment (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Finance lease | $ 3,423 | $ 3,423
Less: accumulated amortization | 2,738 | 2,567
Capital Lease in Premises and Equipment, Net | $ 685 | $ 856

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- Definition Represents Accumulated Depreciation, Depletion and Amortization, Capital Lease in Premises and Equipment. + References No definition available. + Details
Name: | cnob_AccumulatedDepreciationDepletionAndAmortizationCapitalLeaseInPremisesAndEquipment
Namespace Prefix: | cnob_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Capital lease in premises and equipment. + References No definition available. + Details
Name: | cnob_CapitalLeaseInPremisesAndEquipment
Namespace Prefix: | cnob_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Capital Lease in Premises and Equipment, Net + References No definition available. + Details
Name: | cnob_CapitalLeaseInPremisesAndEquipmentNet
Namespace Prefix: | cnob_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant