Document And Entity Information (USD $)	12 Months Ended
	Dec. 31, 2011
Document And Entity Information [Abstract]
Document Type	20-F
Amendment Flag	false
Document Period End Date	Dec. 31, 2011
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2011
Entity Registrant Name	CERAGON NETWORKS LTD
Entity Central Index Key	0001119769
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float	$ 0
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding	36,324,997