Label	Element	Value
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsUnearnedWeightedAverageGrantDateFairValue	cnob_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsUnearnedWeightedAverageGrantDateFairValue	$ 19.46
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsUnearnedNumberOfShares	cnob_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsUnearnedNumberOfShares	94,585
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares	50,203
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue	$ 11.79