XML 76 R61.htm IDEA: XBRL DOCUMENT
v3.20.4

Investment Securities (Details) - Unrealized gains on investment securities - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | $ 477,326 | $ 401,048
Investment Securities Available-for-Sale, Gross Unrealized Gains | 11,015 | 4,875
Investment Securities Available-for-Sale, Gross Unrealized Losses | (386) | (1,222)
Investment Securities Available-for-Sale, Fair Value | 487,955 | 404,701
Federal Agency Obligations [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 37,015 | 27,667
Investment Securities Available-for-Sale, Gross Unrealized Gains | 1,508 | 612
Investment Securities Available-for-Sale, Gross Unrealized Losses | (65) | (42)
Investment Securities Available-for-Sale, Fair Value | 38,458 | 28,237
Residential mortgage pass-through securities [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 266,114 | 199,611
Investment Securities Available-for-Sale, Gross Unrealized Gains | 4,811 | 1,528
Investment Securities Available-for-Sale, Gross Unrealized Losses | (41) | (643)
Investment Securities Available-for-Sale, Fair Value | 270,884 | 200,496
Commercial mortgage pass-through securities [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 6,906 | 4,995
Investment Securities Available-for-Sale, Gross Unrealized Gains | 203 | 37
Investment Securities Available-for-Sale, Gross Unrealized Losses | (187) | (35)
Investment Securities Available-for-Sale, Fair Value | 6,922 | 4,997
Obligations of U.S. states and political subdivisions [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 138,539 | 134,500
Investment Securities Available-for-Sale, Gross Unrealized Gains | 4,269 | 2,411
Investment Securities Available-for-Sale, Gross Unrealized Losses |  | (392)
Investment Securities Available-for-Sale, Fair Value | 142,808 | 136,519
Corporate Bonds and Notes [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 24,925 | 28,142
Investment Securities Available-for-Sale, Gross Unrealized Gains | 222 | 285
Investment Securities Available-for-Sale, Gross Unrealized Losses | (52) | (45)
Investment Securities Available-for-Sale, Fair Value | 25,095 | 28,382
Asset-backed Securities [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 3,521 | 5,845
Investment Securities Available-for-Sale, Gross Unrealized Gains |  |
Investment Securities Available-for-Sale, Gross Unrealized Losses | (41) | (65)
Investment Securities Available-for-Sale, Fair Value | 3,480 | 5,780
Certificates of Deposit [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 149 | 148
Investment Securities Available-for-Sale, Gross Unrealized Gains | 2 | 2
Investment Securities Available-for-Sale, Gross Unrealized Losses |  |
Investment Securities Available-for-Sale, Fair Value | 151 | 150
Other Securities [Member] |  |
Investment securities available-for-sale |  |
Investment Securities Available-for-Sale, Amortized Cost | 157 | 140
Investment Securities Available-for-Sale, Gross Unrealized Gains |  |
Investment Securities Available-for-Sale, Gross Unrealized Losses |  |
Investment Securities Available-for-Sale, Fair Value | $ 157 | $ 140

X
- Definition Available for sale securities gross unrealized gain accumulated in investments. + References No definition available. + Details
Name: | cnob_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
Namespace Prefix: | cnob_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Available for sale securities gross unrealized loss accumulated in investments. + References No definition available. + Details
Name: | cnob_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
Namespace Prefix: | cnob_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | cnob_InvestmentSecuritiesAvailableForSaleAbstract0
Namespace Prefix: | cnob_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesAmortizedCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=cnob_FederalAgencyObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ResidentialMortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CommercialMortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=cnob_CorporateBondsAndNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_AssetBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CertificatesOfDepositMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=cnob_OtherSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |