XML 80 R68.htm IDEA: XBRL DOCUMENT
v3.20.2

Fair Value Measurements and Fair Value of Financial Instruments (Details) - Schedule of fair value on recurring item basis - Recurring [Member] - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2020 | Dec. 31, 2019
Fair value | $ 466,415 | $ 415,886
Municipal Securities [Member] |  |
Fair value | $ 8,912 | $ 9,114
Valuation Techniques | Discounted cash flows | Discounted cash flows
Unobservable Input | Discount rate | Discount rate
Rate | 2.90% | 2.90%

X
- Definition Discount rate used to measure fair value of unobservable inputs. + References No definition available. + Details
Name: | cnob_DiscountRateUsedToMeasureFairValueUnobservableInputs
Namespace Prefix: | cnob_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosures concerning the reasons for transfers into Level 3 of the fair value hierarchy. + References No definition available. + Details
Name: | cnob_FairValueLevel3TransfersInDescription1
Namespace Prefix: | cnob_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Description of fair value valuation techniques. + References No definition available. + Details
Name: | cnob_FairValueValuationTechniques
Namespace Prefix: | cnob_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
Name: | us-gaap_AssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_MunicipalBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |