Document and Entity Information - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2017	Feb. 28, 2018	Jun. 30, 2017
Document And Entity Information [Abstract]
Document Type	10-K
Document Period End Date	Dec. 31, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	FY
Trading Symbol	VLY
Amendment Flag	false
Entity Registrant Name	Valley National Bancorp
Entity Central Index Key	0000714310
Current Fiscal Year End Date	--12-31
Entity Well-known Season Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		330,817,221
Entity Public Float			$ 3.0