$CNOB
ConnectOne Bancorp, Inc. Stock $cnob

$cnob Overview Financials Valuation SEC Filings Company Website

2020 Q1 Form 10-K Financial Statement

#000120677420000674 Filed on March 02, 2020

Income Statement

Concept	2020 Q1	2019 Q4	2019
Revenue	$76.71M	$68.01M	$271.5M
YoY Change	17.64%	18.85%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$949.0K	$1.100M	$3.053M
YoY Change	16.58%	22.22%	-0.29%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$21.43M	$20.58M	$85.17M
YoY Change	5.81%	20.6%	44.55%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$7.077M	$26.98M	$94.03M
YoY Change	-49.91%	20.93%	32.18%
Income Tax	$1.047M	$6.197M	$20.63M
% Of Pretax Income	14.79%	22.97%	21.94%
Net Earnings	$6.030M	$20.78M	$73.40M
YoY Change	-48.17%	11.31%	21.61%
Net Earnings / Revenue	7.86%	30.56%	27.03%
Basic Earnings Per Share	$0.15	$0.59	$2.08
Diluted Earnings Per Share	$0.15	$0.59	$2.07
COMMON SHARES
Basic Shares Outstanding	39.70M shares
Diluted Shares Outstanding

Balance Sheet

Concept	2020 Q1	2019 Q4	2019
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$282.8M	$201.5M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$59.80M	$19.24M	$34.40M
YoY Change	68.45%	0.91%	80.1%
Goodwill	$208.4M	$162.6M
YoY Change		11.42%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$7.279B	$6.174B	$6.174B
YoY Change	20.34%	13.03%	13.03%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$28.70M	$16.40M	$16.40M
YoY Change	71.86%
Deferred Revenue
YoY Change
Short-Term Debt
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$28.70M	$16.40M	$16.40M
YoY Change	71.86%
LONG-TERM LIABILITIES
Long-Term Debt	$129.0M	$128.9M	$128.9M
YoY Change	0.31%	0.23%	0.23%
Other Long-Term Liabilities	$31.90M	$29.70M	$29.70M
YoY Change	34.03%	8.0%	8.0%
Total Long-Term Liabilities	$160.9M	$158.6M	$158.6M
YoY Change	5.58%	1.6%	1.6%
TOTAL LIABILITIES
Total Short-Term Liabilities	$28.70M	$16.40M	$16.40M
Total Long-Term Liabilities	$160.9M	$158.6M	$158.6M
Total Liabilities	$6.426B	$5.443B	$5.443B
YoY Change	19.73%	12.27%	12.26%
SHAREHOLDERS EQUITY
Retained Earnings		$271.8M
YoY Change		28.6%
Common Stock		$468.6M
YoY Change		13.58%
Preferred Stock
YoY Change
Treasury Stock (at cost)		$29.36M
YoY Change		75.63%
Treasury Stock Shares		2.604M shares
Shareholders Equity	$853.7M	$731.2M	$731.2M
YoY Change
Total Liabilities & Shareholders Equity	$7.279B	$6.174B	$6.174B
YoY Change	20.34%	13.03%	13.03%

Cashflow Statement

Concept	2020 Q1	2019 Q4	2019
OPERATING ACTIVITIES
Net Income	$6.030M	$20.78M	$73.40M
YoY Change	-48.17%	11.31%	21.61%
Depreciation, Depletion And Amortization	$949.0K	$1.100M	$3.053M
YoY Change	16.58%	22.22%	-0.29%
Cash From Operating Activities	$46.46M	-$2.700M	$60.69M
YoY Change	257.42%	-112.39%	-31.86%
INVESTING ACTIVITIES
Capital Expenditures	$1.728M	-$200.0K	$1.527M
YoY Change	572.37%	-60.0%	-25.55%
Acquisitions
YoY Change
Other Investing Activities	-$93.60M	$16.50M	-$100.9M
YoY Change	166.67%	-121.91%	-71.59%
Cash From Investing Activities	-$95.36M	$16.30M	-$102.5M
YoY Change	169.82%	-121.56%	-71.31%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			$0.00
YoY Change
Debt Paid & Issued, Net			$8.178M
YoY Change			84.27%
Cash From Financing Activities	$130.2M	-6.200M	$70.90M
YoY Change	478.1%	-108.81%	-75.63%
NET CHANGE
Cash From Operating Activities	$46.46M	-2.700M	$60.69M
Cash From Investing Activities	-$95.36M	16.30M	-$102.5M
Cash From Financing Activities	$130.2M	-6.200M	$70.90M
Net Change In Cash	$81.33M	7.400M	$29.12M
YoY Change	44584.62%	-55.42%	27.8%
FREE CASH FLOW
Cash From Operating Activities	$46.46M	-$2.700M	$60.69M
Capital Expenditures	$1.728M	-$200.0K	$1.527M
Free Cash Flow	$44.73M	-$2.500M	$59.16M
YoY Change	251.07%	-111.21%	-32.01%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2019Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	65717000	USD
CY2019	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2019	dei	Document Annual Report DocumentAnnualReport	true
CY2019	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2019	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2019	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2019	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2018Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	39161000	USD
CY2018Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	412034000	USD
CY2019Q4	us-gaap	Capital Leases Future Minimum Payments Due CapitalLeasesFutureMinimumPaymentsDue	3020000	USD
CY2019Q4	us-gaap	Capital Leases Future Minimum Payments Interest Included In Payments CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments	700000	USD
CY2019	us-gaap	Debt Instrument Issuance Date1 DebtInstrumentIssuanceDate1	2003-12-19
CY2018	us-gaap	Debt Instrument Issuance Date1 DebtInstrumentIssuanceDate1	2003-12-19
CY2019	us-gaap	Subordinated Borrowing Due Date SubordinatedBorrowingDueDate	2034-01-23
CY2018	us-gaap	Subordinated Borrowing Due Date SubordinatedBorrowingDueDate	2034-01-23
CY2019	cnob	Redeemable By Issuer Beginning Date RedeemableByIssuerBeginningDate	2009-01-23
CY2018	cnob	Redeemable By Issuer Beginning Date RedeemableByIssuerBeginningDate	2009-01-23
CY2019	dei	Entity Central Index Key EntityCentralIndexKey	0000712771
CY2019	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2019	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2019	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
CY2019	dei	Amendment Flag AmendmentFlag	false
CY2019	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2019	dei	Entity Small Business EntitySmallBusiness	false
CY2018Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019	dei	Entity Shell Company EntityShellCompany	false
CY2019Q2	dei	Entity Public Float EntityPublicFloat	736800000	USD
CY2020Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	39699929	shares
CY2019Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	404701000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	500293000	USD
CY2018Q4	us-gaap	Long Term Debt LongTermDebt	600001000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	16449000	USD
CY2019Q4	us-gaap	Subordinated Debt SubordinatedDebt	128885000	USD
CY2019Q4	us-gaap	Other Liabilities OtherLiabilities	29673000	USD
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2019Q4	us-gaap	Preferred Stock Value PreferredStockValue		USD
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	55000000	shares
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	37676006	shares
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	35072066	shares
CY2019Q4	us-gaap	Common Stock Value CommonStockValue	468571000	USD
CY2019Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	21344000	USD
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	271782000	USD
CY2019Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	2603940	shares
CY2019Q4	us-gaap	Treasury Stock Value TreasuryStockValue	29360000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1147000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	731190000	USD
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	6174032000	USD
CY2019	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	255479000	USD
CY2019	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	271484000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	201483000	USD
CY2019Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	11185000	USD
CY2019Q4	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	33250000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	5113527000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	38293000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	5075234000	USD
CY2019Q4	us-gaap	Investment Owned Restricted Cost InvestmentOwnedRestrictedCost	27397000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	19236000	USD
CY2019Q4	us-gaap	Interest Receivable InterestReceivable	20949000	USD
CY2019Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	137961000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	15137000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	162574000	USD
CY2019Q4	us-gaap	Finite Lived Core Deposits Gross FiniteLivedCoreDepositsGross	5460000	USD
CY2019Q4	us-gaap	Other Assets OtherAssets	59465000	USD
CY2019Q4	us-gaap	Assets Assets	6174032000	USD
CY2019Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	861728000	USD
CY2019Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	3905814000	USD
CY2019Q4	us-gaap	Deposits Deposits	4767542000	USD
CY2018Q4	us-gaap	Other Liabilities OtherLiabilities	27516000	USD
CY2018Q4	us-gaap	Liabilities Liabilities	4848165000	USD
CY2019Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	135766000	USD
CY2019Q4	us-gaap	Liabilities Liabilities	5442842000	USD
CY2018Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	133205000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	172366000	USD
CY2018Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	11460000	USD
CY2018Q4	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount		USD
CY2018Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	4541092000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	34954000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	4506138000	USD
CY2018Q4	us-gaap	Investment Owned Restricted Cost InvestmentOwnedRestrictedCost	31136000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	19062000	USD
CY2018Q4	us-gaap	Interest Receivable InterestReceivable	18214000	USD
CY2018Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	113820000	USD
CY2018Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset		USD
CY2018Q4	us-gaap	Goodwill Goodwill	145909000	USD
CY2018Q4	us-gaap	Finite Lived Core Deposits Gross FiniteLivedCoreDepositsGross	1737000	USD
CY2018Q4	us-gaap	Other Assets OtherAssets	30216000	USD
CY2018Q4	us-gaap	Assets Assets	5462092000	USD
CY2018Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	768584000	USD
CY2018Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	3323508000	USD
CY2018Q4	us-gaap	Deposits Deposits	4092092000	USD
CY2019	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2019	dei	Security12b Title Security12bTitle	Common Stock, no par value
CY2019	dei	Trading Symbol TradingSymbol	CNOB
CY2018	cnob	Deposit Loan And Other Income DepositLoanAndOtherIncome	2584000	USD
CY2019	cnob	Deposit Loan And Other Income DepositLoanAndOtherIncome	4025000	USD
CY2017	cnob	Deposit Loan And Other Income DepositLoanAndOtherIncome	2680000	USD
CY2019	cnob	Net Performance Units Issued Shares NetPerformanceUnitsIssuedShares	31425	shares
CY2018	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	8482000	USD
CY2018Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent		USD
CY2018Q4	us-gaap	Subordinated Debt SubordinatedDebt	128556000	USD
CY2018Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2018Q4	us-gaap	Preferred Stock Value PreferredStockValue		USD
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	55000000	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	34392464	shares
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	32328542	shares
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	412546000	USD
CY2018Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	15542000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	211345000	USD
CY2018Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	2063922	shares
CY2018Q4	us-gaap	Treasury Stock Value TreasuryStockValue	16717000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-8789000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	613927000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	5462092000	USD
CY2018	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	201524000	USD
CY2017	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	168824000	USD
CY2017	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	6799000	USD
CY2017	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	3569000	USD
CY2018	us-gaap	Interest Expense Deposits InterestExpenseDeposits	39936000	USD
CY2018	us-gaap	Interest Expense Debt InterestExpenseDebt	18982000	USD
CY2017	us-gaap	Interest Expense Debt InterestExpenseDebt	12585000	USD
CY2018	us-gaap	Interest Expense InterestExpense	58918000	USD
CY2017	us-gaap	Interest Expense InterestExpense	36255000	USD
CY2017	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	145069000	USD
CY2017	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	6000000	USD
CY2018	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	136115000	USD
CY2017	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	139069000	USD
CY2019	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	3484000	USD
CY2019	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	512000	USD
CY2019	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	294000	USD
CY2019	us-gaap	Marketable Securities Gain Loss MarketableSecuritiesGainLoss	-280000	USD
CY2019	us-gaap	Noninterest Income NoninterestIncome	8035000	USD
CY2019	us-gaap	Labor And Related Expense LaborAndRelatedExpense	49021000	USD
CY2019	us-gaap	Occupancy Net OccupancyNet	9712000	USD
CY2019	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	2011000	USD
CY2019	us-gaap	Professional Fees ProfessionalFees	5506000	USD
CY2019	us-gaap	Marketing Expense MarketingExpense	1353000	USD
CY2019	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	4503000	USD
CY2019	us-gaap	Business Combination Separately Recognized Transactions Additional Disclosures Acquisition Cost Expensed BusinessCombinationSeparatelyRecognizedTransactionsAdditionalDisclosuresAcquisitionCostExpensed	8955000	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-1047000	USD
CY2019	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1408000	USD
CY2019	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	114000	USD
CY2019	us-gaap	Other Noninterest Expense OtherNoninterestExpense	8598000	USD
CY2019	us-gaap	Noninterest Expense NoninterestExpense	92228000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	94026000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	20631000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	73395000	USD
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.08
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.07
CY2019	us-gaap	Net Income Loss NetIncomeLoss	73395000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	11286000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	2923000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	8363000	USD
CY2019	cnob	Other Comprehensive Income Loss Reclassification Adjustment For Net Gains Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForNetGainsBeforeTax	280000	USD
CY2019	cnob	Other Comprehensive Income Loss Reclassification Adjustment For Net Gains Tax Effect OtherComprehensiveIncomeLossReclassificationAdjustmentForNetGainsTaxEffect	79000	USD
CY2019	cnob	Other Comprehensive Income Loss Reclassification Adjustment For Net Gains Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForNetGainsNetOfTax	201000	USD
CY2019	cnob	Unrealized Holding Gains On Securities Transferred From Available For Sale To Held To Maturity Securities Before Tax UnrealizedHoldingGainsOnSecuritiesTransferredFromAvailableForSaleToHeldToMaturitySecuritiesBeforeTax	-755000	USD
CY2019	cnob	Amortization Of Unrealized Holding Gains On Securities Transferred From Available For Sale To Held To Maturity Securities Tax AmortizationOfUnrealizedHoldingGainsOnSecuritiesTransferredFromAvailableForSaleToHeldToMaturitySecuritiesTax	-213000	USD
CY2019	cnob	Other Comprehensive Income Reclassification Adjustment For Net Gains Tax Effect OtherComprehensiveIncomeReclassificationAdjustmentForNetGainsTaxEffect	-190000	USD
CY2019	cnob	Other Comprehensive Income Reclassification Adjustment For Net Gains Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentForNetGainsNetOfTax	-487000	USD
CY2019	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent	209000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	59000	USD
CY2019	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	150000	USD
CY2019	cnob	Reclassification Adjustment For Realized Losses Included In Net Income ReclassificationAdjustmentForRealizedLossesIncludedInNetIncome	358000	USD
CY2019	cnob	Reclassification Adjustment For Realized Losses Included In Net Income Tax Effect ReclassificationAdjustmentForRealizedLossesIncludedInNetIncomeTaxEffect	101000	USD
CY2019	cnob	Reclassification Adjustment For Realized Losses Included In Net Income Net Of Tax ReclassificationAdjustmentForRealizedLossesIncludedInNetIncomeNetOfTax	257000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	7642000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	81037000	USD
CY2017	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	66389	shares
CY2017	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	417000	USD
CY2017	us-gaap	Stock Issued During Period Shares Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures	57164	shares
CY2019	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	-280000	USD
CY2019	cnob	Tax Provision On Gain On Sale Of Investments TaxProvisionOnGainOnSaleOfInvestments	-79000	USD
CY2018	cnob	Tax Provision On Gain On Sale Of Investments TaxProvisionOnGainOnSaleOfInvestments		USD
CY2019	cnob	Gain Loss On Sale Of Investments Net Of Tax GainLossOnSaleOfInvestmentsNetOfTax	-201000	USD
CY2018	cnob	Gain Loss On Sale Of Investments Net Of Tax GainLossOnSaleOfInvestmentsNetOfTax		USD
CY2017	cnob	Gain Loss On Sale Of Investments Net Of Tax GainLossOnSaleOfInvestmentsNetOfTax	1017000	USD
CY2017	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod	1068000	USD
CY2019	us-gaap	Interest Expense Deposits InterestExpenseDeposits	65570000	USD
CY2019	us-gaap	Interest Expense Debt InterestExpenseDebt	19595000	USD
CY2019	us-gaap	Interest Expense InterestExpense	85165000	USD
CY2019	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	186319000	USD
CY2018	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	157215000	USD
CY2019	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	8100000	USD
CY2018	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	21100000	USD
CY2019	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	178219000	USD
CY2019	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees		USD
CY2018	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees		USD
CY2017	us-gaap	Insurance Commissions And Fees InsuranceCommissionsAndFees	39000	USD
CY2018	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	3094000	USD
CY2017	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	3181000	USD
CY2018	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	61000	USD
CY2017	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	708000	USD
CY2018	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	-266000	USD
CY2017	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss		USD
CY2018	us-gaap	Marketable Securities Gain Loss MarketableSecuritiesGainLoss		USD
CY2017	us-gaap	Marketable Securities Gain Loss MarketableSecuritiesGainLoss	1596000	USD
CY2018	us-gaap	Noninterest Income NoninterestIncome	5473000	USD
CY2017	us-gaap	Noninterest Income NoninterestIncome	8204000	USD
CY2018	us-gaap	Labor And Related Expense LaborAndRelatedExpense	39556000	USD
CY2017	us-gaap	Labor And Related Expense LaborAndRelatedExpense	34878000	USD
CY2018	us-gaap	Occupancy Net OccupancyNet	8312000	USD
CY2017	us-gaap	Occupancy Net OccupancyNet	8163000	USD
CY2018	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	3115000	USD
CY2017	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	3485000	USD
CY2018	us-gaap	Professional Fees ProfessionalFees	3568000	USD
CY2017	us-gaap	Professional Fees ProfessionalFees	2863000	USD
CY2018	us-gaap	Marketing Expense MarketingExpense	980000	USD
CY2017	us-gaap	Marketing Expense MarketingExpense	996000	USD
CY2018	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	4421000	USD
CY2017	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	4543000	USD
CY2018	us-gaap	Business Combination Separately Recognized Transactions Additional Disclosures Acquisition Cost Expensed BusinessCombinationSeparatelyRecognizedTransactionsAdditionalDisclosuresAcquisitionCostExpensed	1335000	USD
CY2017	us-gaap	Business Combination Separately Recognized Transactions Additional Disclosures Acquisition Cost Expensed BusinessCombinationSeparatelyRecognizedTransactionsAdditionalDisclosuresAcquisitionCostExpensed		USD
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt		USD
CY2017	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt		USD
CY2018	us-gaap	Depreciation And Amortization DepreciationAndAmortization	627000	USD
CY2017	us-gaap	Depreciation And Amortization DepreciationAndAmortization	724000	USD
CY2018	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	28000	USD
CY2017	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	250000	USD
CY2019	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense		USD
CY2018	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense		USD
CY2017	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	15592000	USD
CY2018	us-gaap	Other Noninterest Expense OtherNoninterestExpense	8512000	USD
CY2017	us-gaap	Other Noninterest Expense OtherNoninterestExpense	7265000	USD
CY2018	us-gaap	Noninterest Expense NoninterestExpense	70454000	USD
CY2017	us-gaap	Noninterest Expense NoninterestExpense	78759000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	71134000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	68514000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	10782000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	25294000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	60352000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	43220000	USD
CY2017	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	417000	USD
CY2018	cnob	Net Shares Issued In Satisfaction Of Performance Units Earned NetSharesIssuedInSatisfactionOfPerformanceUnitsEarned	819000	USD
CY2017	cnob	Net Shares Issued In Satisfaction Of Performance Units Earned NetSharesIssuedInSatisfactionOfPerformanceUnitsEarned		USD
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.87
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.35
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.86
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.34
CY2018	us-gaap	Net Income Loss NetIncomeLoss	60352000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	43220000	USD
CY2018	cnob	Other Comprehensive Income Reclassification Adjustment For Net Gains Tax Effect OtherComprehensiveIncomeReclassificationAdjustmentForNetGainsTaxEffect	-130000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	635777000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	149582000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	200399000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	201483000	USD
CY2017	us-gaap	Transfer Of Other Real Estate TransferOfOtherRealEstate	1118000	USD
CY2018	cnob	Noncash Or Part Noncash Acquisition Loans Held For Sale Acquired1 NoncashOrPartNoncashAcquisitionLoansHeldForSaleAcquired1	21236000	USD
CY2017	cnob	Noncash Or Part Noncash Acquisition Loans Held For Sale Acquired1 NoncashOrPartNoncashAcquisitionLoansHeldForSaleAcquired1	73916000	USD
CY2018	cnob	Fair Value Of Net Assets Acquired Net Of Cash And Cash Equivalents FairValueOfNetAssetsAcquiredNetOfCashAndCashEquivalents		USD
CY2017	cnob	Fair Value Of Net Assets Acquired Net Of Cash And Cash Equivalents FairValueOfNetAssetsAcquiredNetOfCashAndCashEquivalents		USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-6444000	USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-1350000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-1638000	USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-532000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-4806000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-818000	USD
CY2018	cnob	Other Comprehensive Income Loss Reclassification Adjustment For Net Gains Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForNetGainsBeforeTax		USD
CY2017	cnob	Other Comprehensive Income Loss Reclassification Adjustment For Net Gains Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForNetGainsBeforeTax	-1596000	USD
CY2018	cnob	Other Comprehensive Income Loss Reclassification Adjustment For Net Gains Tax Effect OtherComprehensiveIncomeLossReclassificationAdjustmentForNetGainsTaxEffect		USD
CY2017	cnob	Other Comprehensive Income Loss Reclassification Adjustment For Net Gains Tax Effect OtherComprehensiveIncomeLossReclassificationAdjustmentForNetGainsTaxEffect	-579000	USD
CY2018	cnob	Other Comprehensive Income Loss Reclassification Adjustment For Net Gains Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForNetGainsNetOfTax		USD
CY2017	cnob	Other Comprehensive Income Loss Reclassification Adjustment For Net Gains Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForNetGainsNetOfTax	-1017000	USD
CY2018	cnob	Unrealized Holding Gains On Securities Transferred From Available For Sale To Held To Maturity Securities Before Tax UnrealizedHoldingGainsOnSecuritiesTransferredFromAvailableForSaleToHeldToMaturitySecuritiesBeforeTax	825000	USD
CY2017	cnob	Unrealized Holding Gains On Securities Transferred From Available For Sale To Held To Maturity Securities Before Tax UnrealizedHoldingGainsOnSecuritiesTransferredFromAvailableForSaleToHeldToMaturitySecuritiesBeforeTax	304000	USD
CY2018	cnob	Amortization Of Unrealized Holding Gains On Securities Transferred From Available For Sale To Held To Maturity Securities Tax AmortizationOfUnrealizedHoldingGainsOnSecuritiesTransferredFromAvailableForSaleToHeldToMaturitySecuritiesTax	228000	USD
CY2017	cnob	Amortization Of Unrealized Holding Gains On Securities Transferred From Available For Sale To Held To Maturity Securities Tax AmortizationOfUnrealizedHoldingGainsOnSecuritiesTransferredFromAvailableForSaleToHeldToMaturitySecuritiesTax	124000	USD
CY2019	cnob	Amortization Of Unrealized Holding Gains On Securities Transferred From Available For Sale To Held To Maturity Securities Net Of Tax AmortizationOfUnrealizedHoldingGainsOnSecuritiesTransferredFromAvailableForSaleToHeldToMaturitySecuritiesNetOfTax	-542000	USD
CY2018	cnob	Amortization Of Unrealized Holding Gains On Securities Transferred From Available For Sale To Held To Maturity Securities Net Of Tax AmortizationOfUnrealizedHoldingGainsOnSecuritiesTransferredFromAvailableForSaleToHeldToMaturitySecuritiesNetOfTax	597000	USD
CY2017	cnob	Amortization Of Unrealized Holding Gains On Securities Transferred From Available For Sale To Held To Maturity Securities Net Of Tax AmortizationOfUnrealizedHoldingGainsOnSecuritiesTransferredFromAvailableForSaleToHeldToMaturitySecuritiesNetOfTax	180000	USD
CY2019	cnob	Other Comprehensive Income Reclassification Adjustment For Net Gains Before Tax OtherComprehensiveIncomeReclassificationAdjustmentForNetGainsBeforeTax	-677000	USD
CY2018	cnob	Other Comprehensive Income Reclassification Adjustment For Net Gains Before Tax OtherComprehensiveIncomeReclassificationAdjustmentForNetGainsBeforeTax	-464000	USD
CY2017	cnob	Other Comprehensive Income Reclassification Adjustment For Net Gains Before Tax OtherComprehensiveIncomeReclassificationAdjustmentForNetGainsBeforeTax	406000	USD
CY2017	cnob	Other Comprehensive Income Reclassification Adjustment For Net Gains Tax Effect OtherComprehensiveIncomeReclassificationAdjustmentForNetGainsTaxEffect	166000	USD
CY2018	cnob	Other Comprehensive Income Reclassification Adjustment For Net Gains Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentForNetGainsNetOfTax	-334000	USD
CY2017	cnob	Other Comprehensive Income Reclassification Adjustment For Net Gains Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentForNetGainsNetOfTax	240000	USD
CY2018	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent	-236000	USD
CY2017	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent	2000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-67000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	1000	USD
CY2018	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-169000	USD
CY2017	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	1000	USD
CY2018	cnob	Reclassification Adjustment For Realized Losses Included In Net Income ReclassificationAdjustmentForRealizedLossesIncludedInNetIncome	359000	USD
CY2017	cnob	Reclassification Adjustment For Realized Losses Included In Net Income ReclassificationAdjustmentForRealizedLossesIncludedInNetIncome	412000	USD
CY2018	cnob	Reclassification Adjustment For Realized Losses Included In Net Income Tax Effect ReclassificationAdjustmentForRealizedLossesIncludedInNetIncomeTaxEffect	101000	USD
CY2017	cnob	Reclassification Adjustment For Realized Losses Included In Net Income Tax Effect ReclassificationAdjustmentForRealizedLossesIncludedInNetIncomeTaxEffect	169000	USD
CY2018	cnob	Reclassification Adjustment For Realized Losses Included In Net Income Net Of Tax ReclassificationAdjustmentForRealizedLossesIncludedInNetIncomeNetOfTax	258000	USD
CY2017	cnob	Reclassification Adjustment For Realized Losses Included In Net Income Net Of Tax ReclassificationAdjustmentForRealizedLossesIncludedInNetIncomeNetOfTax	243000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-4116000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1173000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	56236000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	42047000	USD
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	531032000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	43220000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1173000	USD
CY2017	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.30
CY2017	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	9657000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Stock Issued Issuance Costs AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts	180000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1778000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	565437000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	60352000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-4116000	USD
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.30
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	9686000	USD
CY2019	cnob	Non Accrual Payment Status NonAccrualPaymentStatus	P90D
CY2017	cnob	Defined Benefit Plan Amortization And Deferral Net DefinedBenefitPlanAmortizationAndDeferralNet	412000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	7642000	USD
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.36
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	12958000	USD
CY2019	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	540018	shares
CY2018	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	21100000	USD
CY2019	cnob	Repurchase Of Treasury Stock RepurchaseOfTreasuryStock	-12643000	USD
CY2017	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	6000000	USD
CY2019	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense		USD
CY2018	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense		USD
CY2017	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	15592000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1408000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	627000	USD
CY2018	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	189992	shares
CY2018	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	875000	USD
CY2018	us-gaap	Stock Issued During Period Shares Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures	24018	shares
CY2019	cnob	Net Restricted Stock Units Issued NetRestrictedStockUnitsIssued	4904	shares
CY2019	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	38937	shares
CY2019	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	360000	USD
CY2019	cnob	Net Performance Units Issued NetPerformanceUnitsIssued	196000	USD
CY2019	cnob	Stock Issued In Acquisition Of Entity StockIssuedInAcquisitionOfEntity	56025000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2746000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	731190000	USD
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	724000	USD
CY2019	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldAccretion	5056000	USD
CY2018	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldAccretion	1127000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	73395000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	60352000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	43220000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	3053000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	3062000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	3151000	USD
CY2019	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	8100000	USD
CY2017	us-gaap	Certain Loans Acquired In Transfer Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldAccretion	2073000	USD
CY2019	cnob	Accretion On Bank Premises AccretionOnBankPremises	86000	USD
CY2018	cnob	Accretion On Bank Premises AccretionOnBankPremises	67000	USD
CY2017	cnob	Accretion On Bank Premises AccretionOnBankPremises	74000	USD
CY2019	cnob	Accretion On Deposits AccretionOnDeposits	1149000	USD
CY2018	cnob	Accretion On Deposits AccretionOnDeposits	57000	USD
CY2017	cnob	Accretion On Deposits AccretionOnDeposits	31000	USD
CY2019	cnob	Amortization Accretion On Borrowings Net AmortizationAccretionOnBorrowingsNet	-209000	USD
CY2018	cnob	Amortization Accretion On Borrowings Net AmortizationAccretionOnBorrowingsNet	76000	USD
CY2017	cnob	Amortization Accretion On Borrowings Net AmortizationAccretionOnBorrowingsNet	203000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Deductions Medicare Prescription Drug Benefit EffectiveIncomeTaxRateReconciliationDeductionsMedicarePrescriptionDrugBenefit	0.50	pure
CY2019	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:left; margin-top:11pt; margin-bottom: 0pt;color:#000000; "> <span style="font-weight: bold; font-style: italic; ">Reclassifications</span></p> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:left; margin-top:11pt; text-indent: 36pt; margin-bottom: 0pt;color:#000000; ">Certain reclassifications have been made in the consolidated financial statements and footnotes for 2018 and 2017 to conform to the classifications presented in 2019. Such reclassifications had no impact on net income or stockholders’ equity. </p>
CY2018	cnob	Net Performance Units Issued Shares NetPerformanceUnitsIssuedShares	42672	shares
CY2018	us-gaap	Stock Issued During Period Shares Conversion Of Units StockIssuedDuringPeriodSharesConversionOfUnits	-819	shares
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1884000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	613927000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	73395000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	104000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	926000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	3699000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	2942000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	1884000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	1778000	USD
CY2019	us-gaap	Marketable Securities Realized Gain Loss MarketableSecuritiesRealizedGainLoss	-280000	USD
CY2018	us-gaap	Marketable Securities Realized Gain Loss MarketableSecuritiesRealizedGainLoss		USD
CY2017	us-gaap	Marketable Securities Realized Gain Loss MarketableSecuritiesRealizedGainLoss	1596000	USD
CY2019	cnob	Loss On Equity Securities Not Held For Trading LossOnEquitySecuritiesNotHeldForTrading	-294000	USD
CY2019Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangible Assets Other Than Goodwill BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill	5131000	USD
CY2019Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Other Noncurrent Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets	26650000	USD
CY2019Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets	534166000	USD
CY2019Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Financial Liabilities BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinancialLiabilities	416110000	USD
CY2019Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Noncurrent Liabilities Other BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther	8179000	USD
CY2019Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Liabilities BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities	488475000	USD
CY2019Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet	45691000	USD
CY2019Q1	cnob	Goodwill Recorded In Acquisition GoodwillRecordedInAcquisition	10334000	USD
CY2019	cnob	Net Income Loss Available To Common Stockholders NetIncomeLossAvailableToCommonStockholders	73395000	USD
CY2019	cnob	Dividends Paid On Earnings Allocated To Participating Securities DividendsPaidOnEarningsAllocatedToParticipatingSecurities	-295000	USD
CY2019	cnob	Income Attributable To Common Stock Value IncomeAttributableToCommonStockValue	73100000	USD
CY2019	cnob	Weighted Average Common Shares Outstanding Including Participating Securities WeightedAverageCommonSharesOutstandingIncludingParticipatingSecurities	35289	shares
CY2019	cnob	Weighted Average Participating Securities WeightedAverageParticipatingSecurities	-84	shares
CY2019	cnob	Weighted Average Common Shares Outstanding WeightedAverageCommonSharesOutstanding	35205	shares
CY2019	cnob	Incremental Shares From Assumed Conversions Of Options Performance Units And Restricted Shares IncrementalSharesFromAssumedConversionsOfOptionsPerformanceUnitsAndRestrictedShares	88	shares
CY2019	cnob	Weighted Average Common And Equivalent Shares Outstanding WeightedAverageCommonAndEquivalentSharesOutstanding	32293	shares
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.08
CY2018	cnob	Loss On Equity Securities Not Held For Trading LossOnEquitySecuritiesNotHeldForTrading	267000	USD
CY2017	cnob	Loss On Equity Securities Not Held For Trading LossOnEquitySecuritiesNotHeldForTrading		USD
CY2019	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	512000	USD
CY2018	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	61000	USD
CY2017	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	708000	USD
CY2019	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	20499000	USD
CY2018	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	4121000	USD
CY2017	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	9083000	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-1047000	USD
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt		USD
CY2017	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt		USD
CY2019	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	21011000	USD
CY2018	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	4552000	USD
CY2017	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	63731000	USD
CY2019	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	8000	USD
CY2018	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-26000	USD
CY2017	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	8000	USD
CY2019	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	8000	USD
CY2018	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-192000	USD
CY2017	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-82000	USD
CY2019	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	3484000	USD
CY2018	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	3094000	USD
CY2017	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	2952000	USD
CY2019	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-4299000	USD
CY2018	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-3233000	USD
CY2017	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-2631000	USD
CY2019	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	329000	USD
CY2018	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	332000	USD
CY2017	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	165000	USD
CY2019	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	301000	USD
CY2018	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	2744000	USD
CY2017	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	2505000	USD
CY2019	us-gaap	Operating Lease Impairment Loss OperatingLeaseImpairmentLoss	1312000	USD
CY2018	us-gaap	Operating Lease Impairment Loss OperatingLeaseImpairmentLoss		USD
CY2017	us-gaap	Operating Lease Impairment Loss OperatingLeaseImpairmentLoss		USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	22619000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	1134000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-5706000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-2785000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	4988000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	3887000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	60688000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	89060000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	131133000	USD
CY2019	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	225853000	USD
CY2018	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	140013000	USD
CY2017	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	224621000	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	183728000	USD
CY2018	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities		USD
CY2017	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	29543000	USD
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	178116000	USD
CY2018	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	141859000	USD
CY2017	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	109104000	USD
CY2019	us-gaap	Increase Decrease Of Restricted Investments IncreaseDecreaseOfRestrictedInvestments	-3739000	USD
CY2019	us-gaap	Gain On Sale Of Investments GainOnSaleOfInvestments	401000	USD
CY2019	us-gaap	Loss On Sale Of Investments LossOnSaleOfInvestments	681000	USD
CY2018	us-gaap	Increase Decrease Of Restricted Investments IncreaseDecreaseOfRestrictedInvestments	-2361000	USD
CY2017	us-gaap	Increase Decrease Of Restricted Investments IncreaseDecreaseOfRestrictedInvestments	9187000	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity	569000	USD
CY2018	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity		USD
CY2017	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity		USD
CY2019	cnob	Payments On Loans Held For Sale PaymentsOnLoansHeldForSale	47000	USD
CY2018	cnob	Payments On Loans Held For Sale PaymentsOnLoansHeldForSale	159000	USD
CY2017	cnob	Payments On Loans Held For Sale PaymentsOnLoansHeldForSale	3122000	USD
CY2019	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	243430000	USD
CY2018	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	362625000	USD
CY2017	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	714159000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1527000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2051000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2661000	USD
CY2019	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	10000000	USD
CY2018	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies		USD
CY2017	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	10000000	USD
CY2019	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies		USD
CY2018	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	585000	USD
CY2017	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies		USD
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	18000	USD
CY2018	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	1627000	USD
CY2017	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	8000	USD
CY2019	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	11211000	USD
CY2018	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition		USD
CY2017	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition		USD
CY2019	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	915000	USD
CY2018	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	884000	USD
CY2017	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	1124000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-102467000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-357214000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-817727000	USD
CY2019	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	260489000	USD
CY2018	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	297021000	USD
CY2017	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	450888000	USD
CY2019	cnob	Increase In Subordinated Debt IncreaseInSubordinatedDebt		USD
CY2018	cnob	Increase In Subordinated Debt IncreaseInSubordinatedDebt	73525000	USD
CY2017	cnob	Increase In Subordinated Debt IncreaseInSubordinatedDebt		USD
CY2019	us-gaap	Proceeds From Federal Home Loan Bank Advances ProceedsFromFederalHomeLoanBankAdvances	2597000000	USD
CY2018	us-gaap	Proceeds From Federal Home Loan Bank Advances ProceedsFromFederalHomeLoanBankAdvances	1733000000	USD
CY2017	us-gaap	Proceeds From Federal Home Loan Bank Advances ProceedsFromFederalHomeLoanBankAdvances	1280000000	USD
CY2019	us-gaap	Payments For Federal Home Loan Bank Advances PaymentsForFederalHomeLoanBankAdvances	2762150000	USD
CY2018	us-gaap	Payments For Federal Home Loan Bank Advances PaymentsForFederalHomeLoanBankAdvances	1803000000	USD
CY2017	us-gaap	Payments For Federal Home Loan Bank Advances PaymentsForFederalHomeLoanBankAdvances	1071000000	USD
CY2019	us-gaap	Payment Of Financing And Stock Issuance Costs PaymentOfFinancingAndStockIssuanceCosts		USD
CY2018	us-gaap	Payment Of Financing And Stock Issuance Costs PaymentOfFinancingAndStockIssuanceCosts		USD
CY2017	us-gaap	Payment Of Financing And Stock Issuance Costs PaymentOfFinancingAndStockIssuanceCosts	15000000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	12160000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	9664000	USD
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	9612000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock		USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock		USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	180000	USD
CY2019	us-gaap	Payments For Repurchase Of Other Equity PaymentsForRepurchaseOfOtherEquity	12643000	USD
CY2018	us-gaap	Payments For Repurchase Of Other Equity PaymentsForRepurchaseOfOtherEquity		USD
CY2017	us-gaap	Payments For Repurchase Of Other Equity PaymentsForRepurchaseOfOtherEquity		USD
CY2019	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities		USD
CY2018	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities		USD
CY2017	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	264000	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	360000	USD
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	875000	USD
CY2019	cnob	Net Shares Issued In Satisfaction Of Performance Units Earned NetSharesIssuedInSatisfactionOfPerformanceUnitsEarned		USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	70896000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	290938000	USD
CY2019	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	29117000	USD
CY2018	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	22784000	USD
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-50817000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	172366000	USD
CY2019	us-gaap	Interest Paid InterestPaid	88522000	USD
CY2018	us-gaap	Interest Paid InterestPaid	55662000	USD
CY2017	us-gaap	Interest Paid InterestPaid	36721000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	18497000	USD
CY2019	us-gaap	Transfer Of Loans Held For Sale To Portfolio Loans1 TransferOfLoansHeldForSaleToPortfolioLoans1		USD
CY2019	cnob	Noncash Or Part Noncash Acquisition Loans Held For Sale Acquired1 NoncashOrPartNoncashAcquisitionLoansHeldForSaleAcquired1	33297000	USD
CY2019	cnob	Fair Value Of Net Assets Acquired Net Of Cash And Cash Equivalents FairValueOfNetAssetsAcquiredNetOfCashAndCashEquivalents	534146000	USD
CY2019	cnob	Fair Value Of Liabilities Assumed Non Cash FairValueOfLiabilitiesAssumedNonCash	488475000	USD
CY2018	cnob	Fair Value Of Liabilities Assumed Non Cash FairValueOfLiabilitiesAssumedNonCash		USD
CY2017	cnob	Fair Value Of Liabilities Assumed Non Cash FairValueOfLiabilitiesAssumedNonCash		USD
CY2019	us-gaap	Use Of Estimates UseOfEstimates	<p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:left; margin-top:11pt; margin-bottom: 0pt;color:#000000; "> <span style="font-weight: bold; font-style: italic; ">Use of Estimates</span></p> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:left; margin-top:11pt; text-indent: 36pt; margin-bottom: 0pt;color:#000000; ">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. </p>
CY2019	cnob	Maximum Maturity Of Cash And Cash Equivalents MaximumMaturityOfCashAndCashEquivalents	P90D
CY2019	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	5	Integer
CY2019	cnob	Loans Delinquent Period LoansDelinquentPeriod	P90D
CY2019	cnob	Non Accrual Contractual Due NonAccrualContractualDue	P90D
CY2019	cnob	Threshold Amount Of Loan For Evaluation Of Impairment ThresholdAmountOfLoanForEvaluationOfImpairment	250000	USD
CY2019	cnob	Rolling Calculations Years RollingCalculationsYears	P3Y
CY2019Q1	us-gaap	Business Combination Consideration Transferred Equity Interests Issued And Issuable BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable	56025000	USD
CY2019Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Cash And Equivalents BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents	13741000	USD
CY2019Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Marketable Securities BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsMarketableSecurities	121672000	USD
CY2019Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Equipment BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEquipment	1624000	USD
CY2019Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Receivables BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables	2434000	USD
CY2019Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Noncurrent Liabilities Long Term Debt BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt	64186000	USD
CY2018	cnob	Net Income Loss Available To Common Stockholders NetIncomeLossAvailableToCommonStockholders	60352000	USD
CY2017	cnob	Net Income Loss Available To Common Stockholders NetIncomeLossAvailableToCommonStockholders	43220000	USD
CY2018	cnob	Dividends Paid On Earnings Allocated To Participating Securities DividendsPaidOnEarningsAllocatedToParticipatingSecurities	-139000	USD
CY2017	cnob	Dividends Paid On Earnings Allocated To Participating Securities DividendsPaidOnEarningsAllocatedToParticipatingSecurities	-141000	USD
CY2018	cnob	Income Attributable To Common Stock Value IncomeAttributableToCommonStockValue	60213000	USD
CY2017	cnob	Income Attributable To Common Stock Value IncomeAttributableToCommonStockValue	43079000	USD
CY2018	cnob	Weighted Average Common Shares Outstanding Including Participating Securities WeightedAverageCommonSharesOutstandingIncludingParticipatingSecurities	32198	shares
CY2017	cnob	Weighted Average Common Shares Outstanding Including Participating Securities WeightedAverageCommonSharesOutstandingIncludingParticipatingSecurities	31943	shares
CY2018	cnob	Weighted Average Participating Securities WeightedAverageParticipatingSecurities	-74	shares
CY2017	cnob	Weighted Average Participating Securities WeightedAverageParticipatingSecurities	-41	shares
CY2018	cnob	Weighted Average Common Shares Outstanding WeightedAverageCommonSharesOutstanding	32124	shares
CY2017	cnob	Weighted Average Common Shares Outstanding WeightedAverageCommonSharesOutstanding	31902	shares
CY2018	cnob	Incremental Shares From Assumed Conversions Of Options Performance Units And Restricted Shares IncrementalSharesFromAssumedConversionsOfOptionsPerformanceUnitsAndRestrictedShares	233	shares
CY2017	cnob	Incremental Shares From Assumed Conversions Of Options Performance Units And Restricted Shares IncrementalSharesFromAssumedConversionsOfOptionsPerformanceUnitsAndRestrictedShares	335	shares
CY2018	cnob	Weighted Average Common And Equivalent Shares Outstanding WeightedAverageCommonAndEquivalentSharesOutstanding	32357	shares
CY2017	cnob	Weighted Average Common And Equivalent Shares Outstanding WeightedAverageCommonAndEquivalentSharesOutstanding	32237	shares
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.87
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.35
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.86
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.34
CY2019Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	401048000	USD
CY2019Q4	cnob	Available For Sale Securities Gross Unrealized Gain Accumulated In Investments AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments	4875000	USD
CY2018	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments		USD
CY2017	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	1596000	USD
CY2017	cnob	Tax Provision On Gain On Sale Of Investments TaxProvisionOnGainOnSaleOfInvestments	579000	USD
CY2019	cnob	Number Of Investment Securities Sold NumberOfInvestmentSecuritiesSold	53	Integer
CY2019Q4	cnob	Available For Sale Securities Gross Unrealized Loss Accumulated In Investments AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments	1222000	USD
CY2019Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	404701000	USD
CY2018Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	419947000	USD
CY2018Q4	cnob	Available For Sale Securities Gross Unrealized Gain Accumulated In Investments AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments	1297000	USD
CY2018Q4	cnob	Available For Sale Securities Gross Unrealized Loss Accumulated In Investments AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments	9210000	USD
CY2018Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	412034000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Restricted DebtSecuritiesAvailableForSaleRestricted	111500000	USD
CY2018Q4	us-gaap	Debt Securities Available For Sale Restricted DebtSecuritiesAvailableForSaleRestricted	151500000	USD
CY2019Q4	cnob	Securities Available For Sale Net SecuritiesAvailableForSaleNet	404701000	USD
CY2019	cnob	Proceeds From Sale Of Investment Securities ProceedsFromSaleOfInvestmentSecurities	183728000	USD
CY2018	cnob	Proceeds From Sale Of Investment Securities ProceedsFromSaleOfInvestmentSecurities		USD
CY2017	cnob	Proceeds From Sale Of Investment Securities ProceedsFromSaleOfInvestmentSecurities	29543000	USD
CY2018	us-gaap	Loss On Sale Of Investments LossOnSaleOfInvestments		USD
CY2018	cnob	Number Of Investment Securities Sold NumberOfInvestmentSecuritiesSold	148	Integer
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	149428000	USD
CY2019Q4	cnob	Available For Sale Securities Continuous Unrealized Loss Position Aggregate Losses Accumulated In Investments AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLossesAccumulatedInInvestments	-1222000	USD
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	72710000	USD
CY2019Q4	cnob	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses Accumulated In Investments AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLossesAccumulatedInInvestments	-309000	USD
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	76718000	USD
CY2019Q4	cnob	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses Accumulated In Investments AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLossesAccumulatedInInvestments	-913000	USD
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	301569000	USD
CY2018Q4	cnob	Available For Sale Securities Continuous Unrealized Loss Position Aggregate Losses Accumulated In Investments AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLossesAccumulatedInInvestments	-9210000	USD
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	60601000	USD
CY2018Q4	cnob	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses Accumulated In Investments AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLossesAccumulatedInInvestments	-559000	USD
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	240968000	USD
CY2018Q4	cnob	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses Accumulated In Investments AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLossesAccumulatedInInvestments	-8651000	USD
CY2019Q4	cnob	Loans And Leases Receivable Gross LoansAndLeasesReceivableGross	5118294000	USD
CY2018Q4	cnob	Loans And Leases Receivable Gross LoansAndLeasesReceivableGross	4544899000	USD
CY2019Q4	us-gaap	Deferred Costs Current And Noncurrent DeferredCostsCurrentAndNoncurrent	4767000	USD
CY2018Q4	us-gaap	Deferred Costs Current And Noncurrent DeferredCostsCurrentAndNoncurrent	3807000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	5113527000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	4541092000	USD
CY2019Q4	us-gaap	Loans Pledged As Collateral LoansPledgedAsCollateral	2500000000	USD
CY2018Q4	us-gaap	Loans Pledged As Collateral LoansPledgedAsCollateral	2300000000	USD
CY2019Q4	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	33250000	USD
CY2018Q4	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount		USD
CY2019Q4	us-gaap	Notes Receivable Net NotesReceivableNet	6553000	USD
CY2018Q4	us-gaap	Notes Receivable Net NotesReceivableNet	2509000	USD
CY2019	cnob	Non Accrual Contractual Due NonAccrualContractualDue	P90D
CY2019Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	63193000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	108804000	USD
CY2019	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	64927000	USD
CY2019	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod	1575000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	3793000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	3793000	USD
CY2018Q4	cnob	Loans And Leases Receivable Purchased Loans LoansAndLeasesReceivablePurchasedLoans	1134000	USD
CY2019	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	1286000	USD
CY2018	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt		USD
CY2017	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt		USD
CY2019	cnob	Loans And Leases Receivable Purchased Loans Accretion Of Income LoansAndLeasesReceivablePurchasedLoansAccretionOfIncome	1119000	USD
CY2018	cnob	Loans And Leases Receivable Purchased Loans Accretion Of Income LoansAndLeasesReceivablePurchasedLoansAccretionOfIncome	253000	USD
CY2017	cnob	Loans And Leases Receivable Purchased Loans Accretion Of Income LoansAndLeasesReceivablePurchasedLoansAccretionOfIncome	1473000	USD
CY2019Q4	cnob	Loans And Leases Receivable Purchased Loans LoansAndLeasesReceivablePurchasedLoans	1301000	USD
CY2018Q4	cnob	Loans And Leases Receivable Purchased Loans LoansAndLeasesReceivablePurchasedLoans	1134000	USD
CY2017Q4	cnob	Loans And Leases Receivable Purchased Loans LoansAndLeasesReceivablePurchasedLoans	1387000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	49481000	USD
CY2019Q4	cnob	Impaired Financing Receivable With Related Allowance ImpairedFinancingReceivableWithRelatedAllowance	1267000	USD
CY2019	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	3787000	USD
CY2019	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod	102000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	66986000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	112597000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	1267000	USD
CY2019	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	68714000	USD
CY2019	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	1677000	USD
CY2018Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	58184000	USD
CY2018Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	113292000	USD
CY2018	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	62896000	USD
CY2018	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod	708000	USD
CY2018	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod	46000	USD
CY2018Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	1748000	USD
CY2018Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	1754000	USD
CY2018Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	36000	USD
CY2018	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	1776000	USD
CY2018Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	59932000	USD
CY2018Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	115046000	USD
CY2018Q4	cnob	Impaired Financing Receivable With Related Allowance ImpairedFinancingReceivableWithRelatedAllowance	36000	USD
CY2018	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	64672000	USD
CY2018	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	754000	USD
CY2017Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	83531000	USD
CY2017Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	135146000	USD
CY2017	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	43415000	USD
CY2017Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	84664000	USD
CY2017Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	136279000	USD
CY2017Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	39000	USD
CY2017	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	44567000	USD
CY2017	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	1119000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	49481000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	58797000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	5059497000	USD
CY2019Q4	cnob	Loans And Leases Receivable Gross LoansAndLeasesReceivableGross	5118294000	USD
CY2018Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	51855000	USD
CY2018Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	69811000	USD
CY2018Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	4475088000	USD
CY2018Q4	cnob	Loans And Leases Receivable Gross LoansAndLeasesReceivableGross	4544899000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	1267000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	35784000	USD
CY2019Q4	cnob	Allowance For Loan And Lease Losses Acquired Portfolio AllowanceForLoanAndLeaseLossesAcquiredPortfolio	1242000	USD
CY2019Q4	cnob	Allowance For Loan And Lease Losses Acquired With Deteriorated Credit Quality AllowanceForLoanAndLeaseLossesAcquiredWithDeterioratedCreditQuality		USD
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	38293000	USD
CY2019Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	66986000	USD
CY2019Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	4539568000	USD
CY2019Q4	cnob	Loans Receivable Acquired Portfolio LoansReceivableAcquiredPortfolio	505187000	USD
CY2019Q4	us-gaap	Notes Receivable Net NotesReceivableNet	6553000	USD
CY2019Q4	us-gaap	Notes Receivable Net NotesReceivableNet	6553000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	5118294000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	36000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	33718000	USD
CY2018Q4	cnob	Allowance For Loan And Lease Losses Acquired Portfolio AllowanceForLoanAndLeaseLossesAcquiredPortfolio	1200000	USD
CY2018Q4	cnob	Allowance For Loan And Lease Losses Acquired With Deteriorated Credit Quality AllowanceForLoanAndLeaseLossesAcquiredWithDeterioratedCreditQuality		USD
CY2018Q4	cnob	Allowance For Loan And Lease Losses Acquired With Deteriorated Credit Quality AllowanceForLoanAndLeaseLossesAcquiredWithDeterioratedCreditQuality		USD
CY2018Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	34954000	USD
CY2018Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	59932000	USD
CY2018Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	4171343000	USD
CY2018Q4	cnob	Loans Receivable Acquired Portfolio LoansReceivableAcquiredPortfolio	311115000	USD
CY2018Q4	us-gaap	Notes Receivable Net NotesReceivableNet	2509000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	4544899000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	34954000	USD
CY2019	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	5076000	USD
CY2019	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	315000	USD
CY2019	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	8100000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	38293000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	31748000	USD
CY2018	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	18011000	USD
CY2018	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	117000	USD
CY2018	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	21100000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	34954000	USD
CY2016Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	25744000	USD
CY2017	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	239000	USD
CY2017	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	243000	USD
CY2017	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	6000000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	31748000	USD
CY2019	us-gaap	Troubled Debt Restructuring Debtor Current Period Gain Loss On Transfer Of Assets Net Of Tax TroubledDebtRestructuringDebtorCurrentPeriodGainLossOnTransferOfAssetsNetOfTax	52000000.0	USD
CY2019	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	30600000	USD
CY2019	cnob	Loans Performing Under Restructured Terms LoansPerformingUnderRestructuredTerms	21400000	USD
CY2018	us-gaap	Troubled Debt Restructuring Debtor Current Period Gain Loss On Transfer Of Assets Net Of Tax TroubledDebtRestructuringDebtorCurrentPeriodGainLossOnTransferOfAssetsNetOfTax	34500000	USD
CY2018	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	23300000	USD
CY2018	cnob	Loans Performing Under Restructured Terms LoansPerformingUnderRestructuredTerms	11200000	USD
CY2019	cnob	Specific Allowance SpecificAllowance	1300000	USD
CY2018	cnob	Specific Allowance SpecificAllowance	0	USD
CY2019	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	17	Integer
CY2019	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	26051000	USD
CY2019	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	26051000	USD
CY2018	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	40	Integer
CY2018	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	22666000	USD
CY2018	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	22666000	USD
CY2017	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	6	Integer
CY2017	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	10378000	USD
CY2017	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	10378000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	70041000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	61747000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	50805000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	42685000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	19236000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	19062000	USD
CY2019	us-gaap	Adjustment For Amortization AdjustmentForAmortization	3100000	USD
CY2018	us-gaap	Adjustment For Amortization AdjustmentForAmortization	3100000	USD
CY2017	us-gaap	Adjustment For Amortization AdjustmentForAmortization	3200000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	1135000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	918000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	768000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	619000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	493000	USD
CY2019Q4	us-gaap	Capital Leases Future Minimum Payments Due Current CapitalLeasesFutureMinimumPaymentsDueCurrent	321000	USD
CY2019Q4	cnob	Capital Lease In Premises And Equipment CapitalLeaseInPremisesAndEquipment	3408000	USD
CY2018Q4	cnob	Capital Lease In Premises And Equipment CapitalLeaseInPremisesAndEquipment	3408000	USD
CY2019Q4	cnob	Capital Lease In Premises And Equipment Excluding Accumulated Amortization CapitalLeaseInPremisesAndEquipmentExcludingAccumulatedAmortization	1867000	USD
CY2018Q4	cnob	Capital Lease In Premises And Equipment Excluding Accumulated Amortization CapitalLeaseInPremisesAndEquipmentExcludingAccumulatedAmortization	1696000	USD
CY2019Q4	cnob	Capital Lease In Premises And Equipment Net CapitalLeaseInPremisesAndEquipmentNet	1541000	USD
CY2018Q4	cnob	Capital Lease In Premises And Equipment Net CapitalLeaseInPremisesAndEquipmentNet	1712000	USD
CY2019Q4	us-gaap	Capital Leases Future Minimum Payments Due In Two Years CapitalLeasesFutureMinimumPaymentsDueInTwoYears	321000	USD
CY2019Q4	us-gaap	Capital Leases Future Minimum Payments Due In Three Years CapitalLeasesFutureMinimumPaymentsDueInThreeYears	321000	USD
CY2019Q4	us-gaap	Capital Leases Future Minimum Payments Due In Four Years CapitalLeasesFutureMinimumPaymentsDueInFourYears	323000	USD
CY2019Q4	us-gaap	Capital Leases Future Minimum Payments Due In Five Years CapitalLeasesFutureMinimumPaymentsDueInFiveYears	353000	USD
CY2019Q4	us-gaap	Capital Leases Future Minimum Payments Due Thereafter CapitalLeasesFutureMinimumPaymentsDueThereafter	1381000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	1795000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	6287000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	18474000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	2025000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	16449000	USD
CY2019Q4	us-gaap	Capital Leases Future Minimum Payments Present Value Of Net Minimum Payments CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments	2320000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	16400000	USD
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y2M12D
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.030	pure
CY2019	us-gaap	Lease Cost LeaseCost	3100000	USD
CY2018	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	2300000	USD
CY2017	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	2300000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	3223000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	2787000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	2302000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	2080000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	145909000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	145909000	USD
CY2019	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	16665000	USD
CY2018	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod		USD
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss		USD
CY2018	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss		USD
CY2019Q4	us-gaap	Goodwill Goodwill	162574000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	145909000	USD
CY2019Q4	us-gaap	Time Deposits Noncurrent TimeDepositsNoncurrent	1600000000	USD
CY2018Q4	us-gaap	Time Deposits Noncurrent TimeDepositsNoncurrent	1400000000	USD
CY2019Q4	us-gaap	Deposits Received For Securities Loaned At Carrying Value DepositsReceivedForSecuritiesLoanedAtCarryingValue	399200000	USD
CY2018Q4	us-gaap	Deposits Received For Securities Loaned At Carrying Value DepositsReceivedForSecuritiesLoanedAtCarryingValue	405600000	USD
CY2019Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	1086493000	USD
CY2019Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	308622000	USD
CY2019Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	124184000	USD
CY2019Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	31630000	USD
CY2019Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	1732000	USD
CY2019Q4	cnob	Time Deposit Maturities TimeDepositMaturities	1552661000	USD
CY2019Q4	cnob	Time Deposit Maturities Fair Value Premium TimeDepositMaturitiesFairValuePremium	1060000	USD
CY2019Q4	us-gaap	Time Deposits TimeDeposits	1553721000	USD
CY2019Q4	cnob	Time Deposits250000 Or More TimeDeposits250000OrMore	331600000	USD
CY2018Q4	cnob	Time Deposits250000 Or More TimeDeposits250000OrMore	272200000	USD
CY2019Q4	cnob	Brokered Time Deposits With Balances BrokeredTimeDepositsWithBalances	0	USD
CY2018Q4	cnob	Brokered Time Deposits With Balances BrokeredTimeDepositsWithBalances	8800000	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Par Value FederalHomeLoanBankAdvancesParValue	500293000	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Weighted Average Interest Rate FederalHomeLoanBankAdvancesWeightedAverageInterestRate	0.0196	pure
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Par Value FederalHomeLoanBankAdvancesParValue	600001000	USD
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Weighted Average Interest Rate FederalHomeLoanBankAdvancesWeightedAverageInterestRate	0.0259	pure
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary In Next Rolling Twelve Months FederalHomeLoanBankAdvancesMaturitiesSummaryInNextRollingTwelveMonths	400000000	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Weighted Average Interest Rate Maturing In Next Twelve Rolling Months FederalHomeLoanBankAdvancesWeightedAverageInterestRateMaturingInNextTwelveRollingMonths	0.0184	pure
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary In Next Rolling Twelve Months FederalHomeLoanBankAdvancesMaturitiesSummaryInNextRollingTwelveMonths	405000000	USD
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Weighted Average Interest Rate Maturing In Next Twelve Rolling Months FederalHomeLoanBankAdvancesWeightedAverageInterestRateMaturingInNextTwelveRollingMonths	0.0257	pure
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary In Rolling Year Two FederalHomeLoanBankAdvancesMaturitiesSummaryInRollingYearTwo	62000000	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Weighted Average Interest Rate Maturing In Rolling Year Two FederalHomeLoanBankAdvancesWeightedAverageInterestRateMaturingInRollingYearTwo	0.0226	pure
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary In Rolling Year Two FederalHomeLoanBankAdvancesMaturitiesSummaryInRollingYearTwo	110000000	USD
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Weighted Average Interest Rate Maturing In Rolling Year Two FederalHomeLoanBankAdvancesWeightedAverageInterestRateMaturingInRollingYearTwo	0.0275	pure
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary In Rolling Year Three FederalHomeLoanBankAdvancesMaturitiesSummaryInRollingYearThree	10737000	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Weighted Average Interest Rate Maturing In Rolling Year Three FederalHomeLoanBankAdvancesWeightedAverageInterestRateMaturingInRollingYearThree	0.0245	pure
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary In Rolling Year Three FederalHomeLoanBankAdvancesMaturitiesSummaryInRollingYearThree	60000000	USD
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Weighted Average Interest Rate Maturing In Rolling Year Three FederalHomeLoanBankAdvancesWeightedAverageInterestRateMaturingInRollingYearThree	0.0227	pure
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary In Rolling Year Four FederalHomeLoanBankAdvancesMaturitiesSummaryInRollingYearFour	25000000	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Weighted Average Interest Rate Maturing In Rolling Year Four FederalHomeLoanBankAdvancesWeightedAverageInterestRateMaturingInRollingYearFour	0.0292	pure
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary In Rolling Year Four FederalHomeLoanBankAdvancesMaturitiesSummaryInRollingYearFour		USD
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary In Rolling Year Five FederalHomeLoanBankAdvancesMaturitiesSummaryInRollingYearFive		USD
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary In Rolling Year Five FederalHomeLoanBankAdvancesMaturitiesSummaryInRollingYearFive	25000000	USD
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Weighted Average Interest Rate Maturing In Rolling Year Five FederalHomeLoanBankAdvancesWeightedAverageInterestRateMaturingInRollingYearFive	0.0292	pure
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary After Rolling Year Five FederalHomeLoanBankAdvancesMaturitiesSummaryAfterRollingYearFive	2882000	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Weighted Average Interest Rate Maturing After Rolling Year Five FederalHomeLoanBankAdvancesWeightedAverageInterestRateMaturingAfterRollingYearFive	0.0243	pure
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary After Rolling Year Five FederalHomeLoanBankAdvancesMaturitiesSummaryAfterRollingYearFive		USD
CY2019Q4	cnob	Federal Home Loan Bank Advances Par Value Gross FederalHomeLoanBankAdvancesParValueGross	500619000	USD
CY2018Q4	cnob	Federal Home Loan Bank Advances Par Value Gross FederalHomeLoanBankAdvancesParValueGross	600000000	USD
CY2019Q4	cnob	Federal Home Loan Bank Advances Discount Premium FederalHomeLoanBankAdvancesDiscountPremium	326000	USD
CY2018Q4	cnob	Federal Home Loan Bank Advances Discount Premium FederalHomeLoanBankAdvancesDiscountPremium	-1000	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Advances FederalHomeLoanBankAdvances	500293000	USD
CY2018Q4	us-gaap	Federal Home Loan Bank Advances FederalHomeLoanBankAdvances	600001000	USD
CY2019Q4	us-gaap	Line Of Credit LineOfCredit	1900000000	USD
CY2019Q4	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	1000000000.0	USD
CY2019	us-gaap	Schedule Of Repurchase Agreements ScheduleOfRepurchaseAgreements	<p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:left; margin-top:11pt; text-indent: 36pt; margin-bottom: 0pt;color:#000000; "> Repurchase agreements are secured borrowings. The Company pledges investment securities to secure those borrowings. Information concerning repurchase agreements is summarized as follows (dollars in thousands): </p> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:center; margin-bottom: 0pt;color:#000000; "/> <div> <table cellpadding="0" style="border-collapse: collapse;margin: auto;" width="75.177304964539%"> <thead> <tr class="odd" style=""> <td style="width:61%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:left; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:center; margin-bottom: 0pt;color:#000000; "/> </td> <td colspan="2" style="width:11%; border-bottom-width:0.5pt; border-bottom-style:solid; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:center; margin-top:0pt; margin-bottom: 0pt;color:#000000; ">2019 </p> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:center; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:center; margin-bottom: 0pt;color:#000000; "/> </td> <td colspan="2" style="width:11%; border-bottom-width:0.5pt; border-bottom-style:solid; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:center; margin-top:0pt; margin-bottom: 0pt;color:#000000; ">2018 </p> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:center; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:center; margin-bottom: 0pt;color:#000000; "/> </td> <td colspan="2" style="width:11%; border-bottom-width:0.5pt; border-bottom-style:solid; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:center; margin-top:0pt; margin-bottom: 0pt;color:#000000; ">2017 </p> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:center; margin-bottom: 0pt;color:#000000; "/> </td> </tr> </thead> <tbody> <tr class="odd" style="background-color: #B2B2B2; "> <td style="width:61%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:left; margin-top:0pt; margin-bottom: 0pt;color:#000000; ">Average daily balance during the year </p> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align: center; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:left; margin-top:0pt; margin-bottom: 0pt;color:#000000; ">$ </p> </td> <td style="width:10%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:right; margin-top:0pt; margin-bottom: 0pt;color:#000000; ">- </p> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align: center; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align: center; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:left; margin-top:0pt; margin-bottom: 0pt;color:#000000; ">$ </p> </td> <td style="width:10%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:right; margin-top:0pt; margin-bottom: 0pt;color:#000000; ">- </p> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:left; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align: center; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:left; margin-top:0pt; margin-bottom: 0pt;color:#000000; ">$ </p> </td> <td style="width:10%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:right; margin-top:0pt; margin-bottom: 0pt;color:#000000; ">6,781 </p> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:left; margin-bottom: 0pt;color:#000000; "/> </td> </tr> <tr class="even" style=""> <td style="width:61%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:left; margin-top:0pt; margin-bottom: 0pt;color:#000000; ">Average interest rate during the year </p> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align: center; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:left; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:10%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:right; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align: center; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align: center; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:left; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:10%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:right; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:left; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align: center; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:left; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:10%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:right; margin-top:0pt; margin-bottom: 0pt;color:#000000; ">5.95 </p> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:left; margin-top:0pt; margin-bottom: 0pt;color:#000000; ">% </p> </td> </tr> <tr class="odd" style="background-color: #B2B2B2; "> <td style="width:61%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:left; margin-top:0pt; margin-bottom: 0pt;color:#000000; ">Maximum month-end balance during the year </p> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align: center; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:left; margin-top:0pt; margin-bottom: 0pt;color:#000000; ">$ </p> </td> <td style="width:10%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:right; margin-top:0pt; margin-bottom: 0pt;color:#000000; ">- </p> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align: center; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align: center; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:left; margin-top:0pt; margin-bottom: 0pt;color:#000000; ">$ </p> </td> <td style="width:10%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:right; margin-top:0pt; margin-bottom: 0pt;color:#000000; ">- </p> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:left; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align: center; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:left; margin-top:0pt; margin-bottom: 0pt;color:#000000; ">$ </p> </td> <td style="width:10%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:right; margin-top:0pt; margin-bottom: 0pt;color:#000000; ">15,000 </p> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:left; margin-bottom: 0pt;color:#000000; "/> </td> </tr> <tr class="even" style=""> <td style="width:61%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:left; margin-top:0pt; margin-bottom: 0pt;color:#000000; ">Weighted average interest rate during the year </p> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align: center; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:left; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:10%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:right; margin-top:0pt; margin-bottom: 0pt;color:#000000; ">- </p> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align: center; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align: center; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:left; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:10%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:right; margin-top:0pt; margin-bottom: 0pt;color:#000000; ">- </p> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:left; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align: center; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:left; margin-bottom: 0pt;color:#000000; "/> </td> <td style="width:10%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:right; margin-top:0pt; margin-bottom: 0pt;color:#000000; ">5.95 </p> </td> <td style="width:1%; vertical-align:bottom; "> <p style="font-family: Times New Roman, Times, serif; font-size:10pt; text-align:left; margin-top:0pt; margin-bottom: 0pt;color:#000000; ">% </p></td></tr></tbody> </table></div>
CY2019	cnob	Average Daily Balance During Year AverageDailyBalanceDuringYear		USD
CY2018	cnob	Average Daily Balance During Year AverageDailyBalanceDuringYear		USD
CY2017	cnob	Average Daily Balance During Year AverageDailyBalanceDuringYear	6781000	USD
CY2017	us-gaap	Debt Instrument Interest Rate During Period DebtInstrumentInterestRateDuringPeriod	0.0595	pure
CY2019	us-gaap	Line Of Credit Facility Maximum Monthend Outstanding Amount LineOfCreditFacilityMaximumMonthendOutstandingAmount		USD
CY2018	us-gaap	Line Of Credit Facility Maximum Monthend Outstanding Amount LineOfCreditFacilityMaximumMonthendOutstandingAmount		USD
CY2017	us-gaap	Line Of Credit Facility Maximum Monthend Outstanding Amount LineOfCreditFacilityMaximumMonthendOutstandingAmount	15000000	USD
CY2019	cnob	Weighted Average Interest Rate WeightedAverageInterestRate		pure
CY2018	cnob	Weighted Average Interest Rate WeightedAverageInterestRate		pure
CY2017	cnob	Weighted Average Interest Rate WeightedAverageInterestRate	0.0595	pure
CY2018	us-gaap	Proceeds From Issuance Of Trust Preferred Securities ProceedsFromIssuanceOfTrustPreferredSecurities	5000000	USD
CY2019	us-gaap	Proceeds From Issuance Of Trust Preferred Securities ProceedsFromIssuanceOfTrustPreferredSecurities	5000000	USD
CY2019	cnob	Liquidation Value Per Capital Share Description LiquidationValuePerCapitalShareDescription	$1,000 per Capital Security
CY2018	cnob	Liquidation Value Per Capital Share Description LiquidationValuePerCapitalShareDescription	$1,000 per Capital Security
CY2018	cnob	Rate Added To Libor RateAddedToLibor	Floating 3-month LIBOR + 285 Basis Points
CY2019	cnob	Rate Added To Libor RateAddedToLibor	Floating 3-month LIBOR + 285 Basis Points
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	15509000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	8902000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	21090000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	5018000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	954000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	505000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	20527000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	9856000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	21595000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	916000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	2455000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	3876000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-812000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1529000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-177000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	104000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	926000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	3699000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	20631000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	10782000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	25294000	USD
CY2019	cnob	Temporary Surtax On Allocated Income TemporarySurtaxOnAllocatedIncome	1000000	USD
CY2018	cnob	Net Income Tax Expense Benefit NetIncomeTaxExpenseBenefit	600000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	94026000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	71134000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	68514000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21	pure
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21	pure
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	19745000	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	14938000	USD
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	23980000	USD
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	3436000	USD
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1104000	USD
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	213000	USD
CY2019	us-gaap	Income Tax Effects Allocated Directly To Equity Cumulative Effect Of Change In Accounting Principle IncomeTaxEffectsAllocatedDirectlyToEquityCumulativeEffectOfChangeInAccountingPrinciple		USD
CY2018	us-gaap	Income Tax Effects Allocated Directly To Equity Cumulative Effect Of Change In Accounting Principle IncomeTaxEffectsAllocatedDirectlyToEquityCumulativeEffectOfChangeInAccountingPrinciple	-790000	USD
CY2017	us-gaap	Income Tax Effects Allocated Directly To Equity Cumulative Effect Of Change In Accounting Principle IncomeTaxEffectsAllocatedDirectlyToEquityCumulativeEffectOfChangeInAccountingPrinciple	5623000	USD
CY2019	cnob	Income Tax Effects Of Change In Bill IncomeTaxEffectsOfChangeInBill		USD
CY2018	cnob	Income Tax Effects Of Change In Bill IncomeTaxEffectsOfChangeInBill	-618000	USD
CY2017	cnob	Income Tax Effects Of Change In Bill IncomeTaxEffectsOfChangeInBill		USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Life Insurance IncomeTaxReconciliationNondeductibleExpenseLifeInsurance	732000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Life Insurance IncomeTaxReconciliationNondeductibleExpenseLifeInsurance	650000	USD
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense Life Insurance IncomeTaxReconciliationNondeductibleExpenseLifeInsurance	1113000	USD
CY2019	us-gaap	Income Tax Reconciliation Deductions Dividends IncomeTaxReconciliationDeductionsDividends	2519000	USD
CY2018	us-gaap	Income Tax Reconciliation Deductions Dividends IncomeTaxReconciliationDeductionsDividends	1521000	USD
CY2017	us-gaap	Income Tax Reconciliation Deductions Dividends IncomeTaxReconciliationDeductionsDividends	2123000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-27000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	1100000	USD
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-348000	USD
CY2019	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	728000	USD
CY2018	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-581000	USD
CY2017	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-938000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	20631000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	10782000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	25294000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	11333000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	10358000	USD
CY2019Q4	cnob	Deferred Tax Assets Purchase Accounting DeferredTaxAssetsPurchaseAccounting	4543000	USD
CY2018Q4	cnob	Deferred Tax Assets Purchase Accounting DeferredTaxAssetsPurchaseAccounting	307000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions		USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	2203000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	3424000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	2796000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	1440000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	1234000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Trading Securities DeferredTaxAssetsUnrealizedLossesOnTradingSecurities	1509000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Trading Securities DeferredTaxAssetsUnrealizedLossesOnTradingSecurities	1620000	USD
CY2019Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	20000	USD
CY2018Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	19000	USD
CY2019Q4	cnob	Deferred Tax Assets Accrued Rent DeferredTaxAssetsAccruedRent		USD
CY2018Q4	cnob	Deferred Tax Assets Accrued Rent DeferredTaxAssetsAccruedRent	426000	USD
CY2019Q4	cnob	Deferred Tax Asset Capital Lease DeferredTaxAssetCapitalLease	230000	USD
CY2018Q4	cnob	Deferred Tax Asset Capital Lease DeferredTaxAssetCapitalLease	232000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Impaired Nonperforming Nonaccrual Of Interest LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest	69000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Impaired Nonperforming Nonaccrual Of Interest LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest	95000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	2240000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther		USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	24808000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	19290000	USD
CY2019Q4	cnob	Deferred Tax Liabilities Employee Benefit Plans DeferredTaxLiabilitiesEmployeeBenefitPlans	2131000	USD
CY2018Q4	cnob	Deferred Tax Liabilities Employee Benefit Plans DeferredTaxLiabilitiesEmployeeBenefitPlans	2167000	USD
CY2019Q4	cnob	Deferred Tax Liabilities Pension Actuarial Losses DeferredTaxLiabilitiesPensionActuarialLosses	-1062000	USD
CY2018Q4	cnob	Deferred Tax Liabilities Pension Actuarial Losses DeferredTaxLiabilitiesPensionActuarialLosses		USD
CY2019Q4	cnob	Deferred Tax Liabilities Depreciation DeferredTaxLiabilitiesDepreciation	1146000	USD
CY2018Q4	cnob	Deferred Tax Liabilities Depreciation DeferredTaxLiabilitiesDepreciation	512000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	173000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	185000	USD
CY2019Q4	cnob	Deferred Tax Liabilities Market Discount Accretion DeferredTaxLiabilitiesMarketDiscountAccretion	32000	USD
CY2018Q4	cnob	Deferred Tax Liabilities Market Discount Accretion DeferredTaxLiabilitiesMarketDiscountAccretion	414000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Unrealized Gains On Trading Securities DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities		USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Unrealized Gains On Trading Securities DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities	366000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther		USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	198000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	4544000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	3842000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	20264000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	15448000	USD
CY2019Q4	us-gaap	Significant Supply Commitment Remaining Minimum Amount Committed SignificantSupplyCommitmentRemainingMinimumAmountCommitted	1036854000	USD
CY2018Q4	us-gaap	Significant Supply Commitment Remaining Minimum Amount Committed SignificantSupplyCommitmentRemainingMinimumAmountCommitted	858045000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	56903000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	56300000	USD
CY2019	cnob	Loans Payable New LoansPayableNew	8684000	USD
CY2018	cnob	Loans Payable New LoansPayableNew	5041000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	8178000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	4438000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	57409000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	56903000	USD
CY2019	us-gaap	Proceeds From Other Deposits ProceedsFromOtherDeposits	24500000	USD
CY2018	us-gaap	Proceeds From Other Deposits ProceedsFromOtherDeposits	39700000	USD
CY2019Q1	cnob	Capital Conservation Buffer Percentage Rate CapitalConservationBufferPercentageRate	0.025	pure
CY2019Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0154	pure
CY2019Q4	cnob	Total Risk Based Capital Ratio TotalRiskBasedCapitalRatio	0.0213	pure
CY2019	cnob	Other Comprehensive Income Reclassification Adjustment For Net Gains Tax Effect OtherComprehensiveIncomeReclassificationAdjustmentForNetGainsTaxEffect	-190000	USD
CY2018	cnob	Other Comprehensive Income Reclassification Adjustment For Net Gains Tax Effect OtherComprehensiveIncomeReclassificationAdjustmentForNetGainsTaxEffect	-130000	USD
CY2017	cnob	Other Comprehensive Income Reclassification Adjustment For Net Gains Tax Effect OtherComprehensiveIncomeReclassificationAdjustmentForNetGainsTaxEffect	166000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	2724000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-5841000	USD
CY2019Q4	cnob	Accumulated Other Comprehensive Income Loss Cash Flow Hedge AccumulatedOtherComprehensiveIncomeLossCashFlowHedge	193000	USD
CY2018Q4	cnob	Accumulated Other Comprehensive Income Loss Cash Flow Hedge AccumulatedOtherComprehensiveIncomeLossCashFlowHedge	-837000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	3678000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	3785000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1147000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-8789000	USD
CY2019Q4	cnob	Increase Decrease Retained Earnings Deficit IncreaseDecreaseRetainedEarningsDeficit	709000	USD
CY2019Q4	cnob	Cumulative Effect Adjustment To Balance Sheet CumulativeEffectAdjustmentToBalanceSheet	55000	USD
CY2019	us-gaap	General Discussion Of Pension And Other Postretirement Benefits GeneralDiscussionOfPensionAndOtherPostretirementBenefits	The Company maintains a frozen noncontributory pension plan covering employees of the Company prior to the merger with Legacy ConnectOne. The benefits are based on years of service and the employee’s compensation over the prior five-year period. The plan’s benefits are payable in the form of a ten-year certain and life annuity. The plan is intended to be a tax-qualified defined benefit plan under Section 401(a) of the Internal Revenue Code. Payments may be made under the Pension Plan once attaining the normal retirement age of 65 and are generally equal to 44% of a participant’s highest average compensation over a 5-year period.
CY2018Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	10969000	USD
CY2017Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	13129000	USD
CY2019	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	453000	USD
CY2018	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	427000	USD
CY2019	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	-1909000	USD
CY2018	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	1716000	USD
CY2019	cnob	Defined Benefit Plan Benefits Paid On Plan Assets DefinedBenefitPlanBenefitsPaidOnPlanAssets	798000	USD
CY2018	cnob	Defined Benefit Plan Benefits Paid On Plan Assets DefinedBenefitPlanBenefitsPaidOnPlanAssets	871000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	13023000	USD
CY2017Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	12609000	USD
CY2019	us-gaap	Defined Benefit Plan Actual Return On Plan Assets DefinedBenefitPlanActualReturnOnPlanAssets	2391000	USD
CY2018	us-gaap	Defined Benefit Plan Actual Return On Plan Assets DefinedBenefitPlanActualReturnOnPlanAssets	-715000	USD
CY2019	cnob	Defined Benefit Plan Employer Contribtution Of Plan Assets DefinedBenefitPlanEmployerContribtutionOfPlanAssets		USD
CY2018	cnob	Defined Benefit Plan Employer Contribtution Of Plan Assets DefinedBenefitPlanEmployerContribtutionOfPlanAssets	2000000	USD
CY2019	us-gaap	Defined Benefit Plan Benefit Obligation Benefits Paid DefinedBenefitPlanBenefitObligationBenefitsPaid	798000	USD
CY2018	us-gaap	Defined Benefit Plan Benefit Obligation Benefits Paid DefinedBenefitPlanBenefitObligationBenefitsPaid	871000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	2083000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Funded Status Of Plan DefinedBenefitPlanFundedStatusOfPlan	2054000	USD
CY2019	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation Increase Decrease For Settlement And Curtailment DefinedBenefitPlanAccumulatedBenefitObligationIncreaseDecreaseForSettlementAndCurtailment	12500000	USD
CY2018	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation Increase Decrease For Settlement And Curtailment DefinedBenefitPlanAccumulatedBenefitObligationIncreaseDecreaseForSettlementAndCurtailment	11000000.0	USD
CY2019	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	301000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	-5116000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	-5265000	USD
CY2019	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	453000	USD
CY2018	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	427000	USD
CY2017	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	478000	USD
CY2019	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	697000	USD
CY2018	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	765000	USD
CY2017	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	640000	USD
CY2019	cnob	Defined Benefit Plan Amortization And Deferral Net DefinedBenefitPlanAmortizationAndDeferralNet	358000	USD
CY2018	cnob	Defined Benefit Plan Amortization And Deferral Net DefinedBenefitPlanAmortizationAndDeferralNet	366000	USD
CY2019	us-gaap	Pension Expense PensionExpense	114000	USD
CY2018	us-gaap	Pension Expense PensionExpense	28000	USD
CY2017	us-gaap	Pension Expense PensionExpense	250000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-150000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-595000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-410000	USD
CY2019	cnob	Defined Benefit Plan Amounts Recognized In Net Periodic Benefit Cost And Other Comprehensive Income Before Tax DefinedBenefitPlanAmountsRecognizedInNetPeriodicBenefitCostAndOtherComprehensiveIncomeBeforeTax	-36000	USD
CY2018	cnob	Defined Benefit Plan Amounts Recognized In Net Periodic Benefit Cost And Other Comprehensive Income Before Tax DefinedBenefitPlanAmountsRecognizedInNetPeriodicBenefitCostAndOtherComprehensiveIncomeBeforeTax	-567000	USD
CY2017	cnob	Defined Benefit Plan Amounts Recognized In Net Periodic Benefit Cost And Other Comprehensive Income Before Tax DefinedBenefitPlanAmountsRecognizedInNetPeriodicBenefitCostAndOtherComprehensiveIncomeBeforeTax	-160000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0299	pure
CY2018Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0405	pure
CY2017Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0341	pure
CY2019	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.0299	pure
CY2018	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.0405	pure
CY2017	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.0341	pure
CY2019	cnob	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Expected Long Term Rate Of Return On Plan Assets DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationExpectedLongTermRateOfReturnOnPlanAssets	0.0550	pure
CY2018	cnob	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Expected Long Term Rate Of Return On Plan Assets DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationExpectedLongTermRateOfReturnOnPlanAssets	0.0550	pure
CY2017	cnob	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Expected Long Term Rate Of Return On Plan Assets DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationExpectedLongTermRateOfReturnOnPlanAssets	0.0550	pure
CY2019	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease		pure
CY2018	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease		pure
CY2017	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease		pure
CY2019Q4	us-gaap	Defined Benefit Plan Plan Assets Target Allocation Percentage DefinedBenefitPlanPlanAssetsTargetAllocationPercentage	1	pure
CY2018Q4	us-gaap	Defined Benefit Plan Plan Assets Target Allocation Percentage DefinedBenefitPlanPlanAssetsTargetAllocationPercentage	1	pure
CY2018Q4	us-gaap	Defined Benefit Plan Weighted Average Asset Allocations DefinedBenefitPlanWeightedAverageAssetAllocations	1	pure
CY2019Q4	us-gaap	Defined Benefit Plan Weighted Average Asset Allocations DefinedBenefitPlanWeightedAverageAssetAllocations	1	pure
CY2018	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.055	pure
CY2019	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.055	pure
CY2019Q4	us-gaap	Defined Benefit Plan Amounts Recognized In Balance Sheet DefinedBenefitPlanAmountsRecognizedInBalanceSheet	14616000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Amounts Recognized In Balance Sheet DefinedBenefitPlanAmountsRecognizedInBalanceSheet	13023000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Next Twelve Months DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths	722000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Two DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo	725000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Three DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree	702000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Four DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour	684000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Five DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive	670000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Five Fiscal Years Thereafter DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter	3489000	USD
CY2019	us-gaap	Defined Benefit Plan Explanation Of Significant Change In Benefit Obligation Or Plan Assets Not Apparent From Other Required Disclosures DefinedBenefitPlanExplanationOfSignificantChangeInBenefitObligationOrPlanAssetsNotApparentFromOtherRequiredDisclosures	Beginning with the 2014 plan year, the 401(k) plan was amended to provide for a match of 50% of elective contributions, up to 6% of an employee’s contribution. In 2018, the 401 (k) plan was amended to provide for 100% matching of employee contributions up to 5%
CY2019	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	1300000	USD
CY2018	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	900000	USD
CY2017	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	400000	USD
CY2019	cnob	Deferred Compensation Expense Related To Supplemental Executive Retirement Plan DeferredCompensationExpenseRelatedToSupplementalExecutiveRetirementPlan	300000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1 ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1	P3Y
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	108463	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	8.35
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross		shares
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
CY2019	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	38937	shares
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	8.46
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod		shares
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	69526	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	8.29
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P2Y1M6D
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	1243231000	USD
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	69526	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	8.29
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P2Y1M6D
CY2019Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	1243231000	USD
CY2018	us-gaap	Derivative Average Remaining Maturity1 DerivativeAverageRemainingMaturity1	P2Y
CY2019	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-273000	USD
CY2018	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	1159000	USD
CY2019Q4	us-gaap	Amount Available For Dividend Distribution Without Affecting Capital Adequacy Requirements AmountAvailableForDividendDistributionWithoutAffectingCapitalAdequacyRequirements	259600000	USD
CY2015Q3	us-gaap	Derivative Liability Notional Amount DerivativeLiabilityNotionalAmount	25000000.0	USD
CY2017Q2	us-gaap	Derivative Liability Notional Amount DerivativeLiabilityNotionalAmount	25000000.0	USD
CY2019Q2	us-gaap	Derivative Liability Notional Amount DerivativeLiabilityNotionalAmount	50000000.0	USD
CY2019Q3	us-gaap	Derivative Liability Notional Amount DerivativeLiabilityNotionalAmount	50000000.0	USD
CY2019Q4	cnob	Notional Amount NotionalAmount	150000000	USD
CY2018Q4	cnob	Notional Amount NotionalAmount	75000000	USD
CY2019Q4	us-gaap	Derivative Average Fixed Interest Rate DerivativeAverageFixedInterestRate	0.0182	pure
CY2018Q4	us-gaap	Derivative Average Fixed Interest Rate DerivativeAverageFixedInterestRate	0.0170	pure
CY2019	cnob	Weighted Average Receive Rates WeightedAverageReceiveRates	0.0237	pure
CY2018	cnob	Weighted Average Receive Rates WeightedAverageReceiveRates	0.0219	pure
CY2019	us-gaap	Derivative Average Remaining Maturity1 DerivativeAverageRemainingMaturity1	P1Y6M
CY2019	cnob	Interest Expense Of Interest Rate Cash Flow Hedge InterestExpenseOfInterestRateCashFlowHedge	-700000	USD
CY2018	cnob	Interest Expense Of Interest Rate Cash Flow Hedge InterestExpenseOfInterestRateCashFlowHedge	-500000	USD
CY2017	cnob	Interest Expense Of Interest Rate Cash Flow Hedge InterestExpenseOfInterestRateCashFlowHedge	400000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	201483000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	201483000	USD
CY2019Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	404701000	USD
CY2019Q4	cnob	Available For Sale Securities Carrying Value AvailableForSaleSecuritiesCarryingValue	404701000	USD
CY2019Q4	us-gaap	Restricted Investments RestrictedInvestments	27397000	USD
CY2019Q4	us-gaap	Restricted Investments At Fair Value RestrictedInvestmentsAtFairValue		USD
CY2019Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	11185000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	11185000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	5075234000	USD
CY2019Q4	us-gaap	Loans Receivable Fair Value Disclosure LoansReceivableFairValueDisclosure	5096669000	USD
CY2019Q4	us-gaap	Interest Receivable InterestReceivable	20949000	USD
CY2019Q4	us-gaap	Receivables Fair Value Disclosure ReceivablesFairValueDisclosure	20949000	USD
CY2019Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	861728000	USD
CY2019Q4	cnob	Non Interest Bearing Deposits Fair Value Disclosure NonInterestBearingDepositsFairValueDisclosure	861728000	USD
CY2019Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	3905814000	USD
CY2019Q4	cnob	Interest Bearing Deposits Fair Value Disclosure InterestBearingDepositsFairValueDisclosure	3917405000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	500293000	USD
CY2019Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	502026000	USD
CY2019Q4	us-gaap	Subordinated Debt SubordinatedDebt	128885000	USD
CY2019Q4	us-gaap	Fair Value Liabilities Measured On Recurring Basis Subordinated Debt Obligations FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations	134973000	USD
CY2019Q4	cnob	Derivatives Liabilities Carrying Amount DerivativesLiabilitiesCarryingAmount	273000	USD
CY2019Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	273000	USD
CY2019Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	4018000	USD
CY2019Q4	us-gaap	Accrued Liabilities Fair Value Disclosure AccruedLiabilitiesFairValueDisclosure	4018000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	172366000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	172366000	USD
CY2018Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	412034000	USD
CY2018Q4	cnob	Available For Sale Securities Carrying Value AvailableForSaleSecuritiesCarryingValue	412034000	USD
CY2018Q4	us-gaap	Restricted Investments RestrictedInvestments	31136000	USD
CY2018Q4	us-gaap	Restricted Investments At Fair Value RestrictedInvestmentsAtFairValue		USD
CY2018Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	11460000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	11460000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	4506138000	USD
CY2018Q4	us-gaap	Loans Receivable Fair Value Disclosure LoansReceivableFairValueDisclosure	4402878000	USD
CY2018Q4	us-gaap	Derivative Assets DerivativeAssets	1159000	USD
CY2018Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	1159000	USD
CY2018Q4	us-gaap	Interest Receivable InterestReceivable	18214000	USD
CY2018Q4	us-gaap	Receivables Fair Value Disclosure ReceivablesFairValueDisclosure	18214000	USD
CY2018Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	768584000	USD
CY2018Q4	cnob	Non Interest Bearing Deposits Fair Value Disclosure NonInterestBearingDepositsFairValueDisclosure	768584000	USD
CY2018Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	3323508000	USD
CY2018Q4	cnob	Interest Bearing Deposits Fair Value Disclosure InterestBearingDepositsFairValueDisclosure	3320640000	USD
CY2018Q4	us-gaap	Long Term Debt LongTermDebt	600001000	USD
CY2018Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	598598000	USD
CY2018Q4	us-gaap	Subordinated Debt SubordinatedDebt	128556000	USD
CY2018Q4	us-gaap	Fair Value Liabilities Measured On Recurring Basis Subordinated Debt Obligations FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations	132426000	USD
CY2018Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	6764000	USD
CY2018Q4	us-gaap	Accrued Liabilities Fair Value Disclosure AccruedLiabilitiesFairValueDisclosure	6764000	USD
CY2019Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	14128000	USD
CY2019Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6197000	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6440000	USD
CY2019Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5501000	USD
CY2019Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2493000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	20783000	USD
CY2019Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	68008000	USD
CY2019Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	70389000	USD
CY2019Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	67878000	USD
CY2019Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	65209000	USD
CY2019Q4	us-gaap	Interest Expense InterestExpense	20577000	USD
CY2019Q3	us-gaap	Interest Expense InterestExpense	21983000	USD
CY2019Q2	us-gaap	Interest Expense InterestExpense	22348000	USD
CY2019Q1	us-gaap	Interest Expense InterestExpense	20257000	USD
CY2019Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	47431000	USD
CY2019Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	48406000	USD
CY2019Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	45530000	USD
CY2019Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	44952000	USD
CY2019Q4	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	500000	USD
CY2019Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	2000000	USD
CY2019Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1100000	USD
CY2019Q1	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	4500000	USD
CY2019Q4	cnob	Total Other Income Net Of Securities Gains TotalOtherIncomeNetOfSecuritiesGains	2246000	USD
CY2019Q3	cnob	Total Other Income Net Of Securities Gains TotalOtherIncomeNetOfSecuritiesGains	2109000	USD
CY2019Q2	cnob	Total Other Income Net Of Securities Gains TotalOtherIncomeNetOfSecuritiesGains	1942000	USD
CY2019Q1	cnob	Total Other Income Net Of Securities Gains TotalOtherIncomeNetOfSecuritiesGains	1738000	USD
CY2019Q4	us-gaap	Other General Expense OtherGeneralExpense	22197000	USD
CY2019Q3	us-gaap	Other General Expense OtherGeneralExpense	20379000	USD
CY2019Q2	us-gaap	Other General Expense OtherGeneralExpense	21590000	USD
CY2019Q1	us-gaap	Other General Expense OtherGeneralExpense	28062000	USD
CY2019Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	26980000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	28136000	USD
CY2019Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	24782000	USD
CY2018Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	38147000	USD
CY2018Q4	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1100000	USD
CY2018Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1100000	USD
CY2018Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1100000	USD
CY2018Q1	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	17800000	USD
CY2018Q4	cnob	Total Other Income Net Of Securities Gains TotalOtherIncomeNetOfSecuritiesGains	1515000	USD
CY2018Q3	cnob	Total Other Income Net Of Securities Gains TotalOtherIncomeNetOfSecuritiesGains	1429000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	21696000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	19281000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	11635000	USD
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.59
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.60
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.55
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.33
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.59
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.60
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.54
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.33
CY2018Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	57223000	USD
CY2018Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	55351000	USD
CY2018Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	53084000	USD
CY2018Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	50475000	USD
CY2018Q4	us-gaap	Interest Expense InterestExpense	17062000	USD
CY2018Q3	us-gaap	Interest Expense InterestExpense	15389000	USD
CY2018Q2	us-gaap	Interest Expense InterestExpense	14139000	USD
CY2018Q1	us-gaap	Interest Expense InterestExpense	12328000	USD
CY2018Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	40161000	USD
CY2018Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	39962000	USD
CY2018Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	38945000	USD
CY2018Q2	cnob	Total Other Income Net Of Securities Gains TotalOtherIncomeNetOfSecuritiesGains	1388000	USD
CY2018Q1	cnob	Total Other Income Net Of Securities Gains TotalOtherIncomeNetOfSecuritiesGains	1407000	USD
CY2018Q4	us-gaap	Other General Expense OtherGeneralExpense	18266000	USD
CY2018Q3	us-gaap	Other General Expense OtherGeneralExpense	18287000	USD
CY2018Q2	us-gaap	Other General Expense OtherGeneralExpense	17108000	USD
CY2018Q1	us-gaap	Other General Expense OtherGeneralExpense	17059000	USD
CY2018Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	22310000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	22004000	USD
CY2018Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	22125000	USD
CY2018Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	4695000	USD
CY2018Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3638000	USD
CY2018Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2102000	USD
CY2018Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	4598000	USD
CY2018Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	444000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	18672000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	19902000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	17527000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	4251000	USD
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.58
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.62
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.54
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.13
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.58
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.61
CY2018	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	99000	USD
CY2019	us-gaap	Noninterest Income NoninterestIncome	8035000	USD
CY2018	us-gaap	Noninterest Income NoninterestIncome	5473000	USD
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.54
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.13
CY2019	cnob	Overdraft Fees OverdraftFees	1264000	USD
CY2018	cnob	Overdraft Fees OverdraftFees	847000	USD
CY2019	us-gaap	Other Income OtherIncome	871000	USD
CY2018	us-gaap	Other Income OtherIncome	607000	USD
CY2019	cnob	Interchange Income InterchangeIncome	761000	USD
CY2018	cnob	Interchange Income InterchangeIncome	628000	USD
CY2019	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	512000	USD
CY2018	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	61000	USD
CY2019	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	294000	USD
CY2018	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	-266000	USD
CY2019	us-gaap	Marketable Securities Realized Gain Loss MarketableSecuritiesRealizedGainLoss	-280000	USD
CY2018	us-gaap	Marketable Securities Realized Gain Loss MarketableSecuritiesRealizedGainLoss		USD
CY2019	cnob	Wire Transfer Fees WireTransferFees	481000	USD
CY2018	cnob	Wire Transfer Fees WireTransferFees	309000	USD
CY2019	cnob	Loan Servicing Fees LoanServicingFees	515000	USD
CY2018	cnob	Loan Servicing Fees LoanServicingFees	94000	USD
CY2019	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	3484000	USD
CY2018	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	3094000	USD
CY2019	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	133000	USD

Files In Submission

Name	View Source	Status
0001206774-20-000674-index-headers.html	Edgar Link	pending
0001206774-20-000674-index.html	Edgar Link	pending
0001206774-20-000674.txt	Edgar Link	pending
0001206774-20-000674-xbrl.zip	Edgar Link	pending
cnob-20191231.xsd	Edgar Link	pending
cnob-20191231_cal.xml	Edgar Link	unprocessable
cnob-20191231_def.xml	Edgar Link	unprocessable
cnob-20191231_lab.xml	Edgar Link	unprocessable
cnob-20191231_pre.xml	Edgar Link	unprocessable
cnob-large.jpg	Edgar Link	pending
cnobchart.jpg	Edgar Link	pending
cob3663101-10k.htm	Edgar Link	pending
cob3663101-10k_htm.xml	Edgar Link	completed
cob3663101-ex211.htm	Edgar Link	pending
cob3663101-ex231.htm	Edgar Link	pending
cob3663101-ex311.htm	Edgar Link	pending
cob3663101-ex312.htm	Edgar Link	pending
cob3663101-ex32.htm	Edgar Link	pending
cob3663101-ex4.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R100.htm	Edgar Link	pending
R101.htm	Edgar Link	pending
R102.htm	Edgar Link	pending
R103.htm	Edgar Link	pending
R104.htm	Edgar Link	pending
R105.htm	Edgar Link	pending
R106.htm	Edgar Link	pending
R107.htm	Edgar Link	pending
R108.htm	Edgar Link	pending
R109.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R110.htm	Edgar Link	pending
R111.htm	Edgar Link	pending
R112.htm	Edgar Link	pending
R113.htm	Edgar Link	pending
R114.htm	Edgar Link	pending
R115.htm	Edgar Link	pending
R116.htm	Edgar Link	pending
R117.htm	Edgar Link	pending
R118.htm	Edgar Link	pending
R119.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R120.htm	Edgar Link	pending
R121.htm	Edgar Link	pending
R122.htm	Edgar Link	pending
R123.htm	Edgar Link	pending
R124.htm	Edgar Link	pending
R125.htm	Edgar Link	pending
R126.htm	Edgar Link	pending
R127.htm	Edgar Link	pending
R128.htm	Edgar Link	pending
R129.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R130.htm	Edgar Link	pending
R131.htm	Edgar Link	pending
R132.htm	Edgar Link	pending
R133.htm	Edgar Link	pending
R134.htm	Edgar Link	pending
R135.htm	Edgar Link	pending
R136.htm	Edgar Link	pending
R137.htm	Edgar Link	pending
R138.htm	Edgar Link	pending
R139.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R140.htm	Edgar Link	pending
R141.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R49.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R50.htm	Edgar Link	pending
R51.htm	Edgar Link	pending
R52.htm	Edgar Link	pending
R53.htm	Edgar Link	pending
R54.htm	Edgar Link	pending
R55.htm	Edgar Link	pending
R56.htm	Edgar Link	pending
R57.htm	Edgar Link	pending
R58.htm	Edgar Link	pending
R59.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R60.htm	Edgar Link	pending
R61.htm	Edgar Link	pending
R62.htm	Edgar Link	pending
R63.htm	Edgar Link	pending
R64.htm	Edgar Link	pending
R65.htm	Edgar Link	pending
R66.htm	Edgar Link	pending
R67.htm	Edgar Link	pending
R68.htm	Edgar Link	pending
R69.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R70.htm	Edgar Link	pending
R71.htm	Edgar Link	pending
R72.htm	Edgar Link	pending
R73.htm	Edgar Link	pending
R74.htm	Edgar Link	pending
R75.htm	Edgar Link	pending
R76.htm	Edgar Link	pending
R77.htm	Edgar Link	pending
R78.htm	Edgar Link	pending
R79.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R80.htm	Edgar Link	pending
R81.htm	Edgar Link	pending
R82.htm	Edgar Link	pending
R83.htm	Edgar Link	pending
R84.htm	Edgar Link	pending
R85.htm	Edgar Link	pending
R86.htm	Edgar Link	pending
R87.htm	Edgar Link	pending
R88.htm	Edgar Link	pending
R89.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
R90.htm	Edgar Link	pending
R91.htm	Edgar Link	pending
R92.htm	Edgar Link	pending
R93.htm	Edgar Link	pending
R94.htm	Edgar Link	pending
R95.htm	Edgar Link	pending
R96.htm	Edgar Link	pending
R97.htm	Edgar Link	pending
R98.htm	Edgar Link	pending
R99.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

Create your account

Find Stocks Worth Researching

Deeply Understand Businesses

Value Businesses Intelligently

$CNOB
ConnectOne Bancorp, Inc. Stock $cnob

2020 Q1 Form 10-K Financial Statement

#000120677420000674 Filed on March 02, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CNOB ConnectOne Bancorp, Inc. Stock $cnob

2020 Q1 Form 10-K Financial Statement

#000120677420000674 Filed on March 02, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CNOB
ConnectOne Bancorp, Inc. Stock $cnob