PREMISES AND EQUIPMENT (Details) - Schedule of Capital Lease in Premises and Equipment (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Schedule of Capital Lease in Premises and Equipment [Abstract]
Capital Lease	$ 3,422cnob_CapitalLeaseInPremisesAndEquipment
Less: accumulated amortization	1,026
	$ 2,396

Capital lease in premises and equipment excluding accumulated amortization.

No definition available.

Name:	cnob_CapitalLeaseInPremisesAndEquipmentExcludingAccumulatedAmortization
Namespace Prefix:	cnob_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant