Document And Entity Information	6 Months Ended
	Jun. 30, 2014	Aug. 11, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	ConnectOne Bancorp, Inc.
Document Type	10-Q
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding		29,825,658
Amendment Flag	false
Entity Central Index Key	0000712771
Entity Filer Category	Accelerated Filer
Document Period End Date	Jun. 30, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q2