Document and Entity Information Document (USD $) Share data in Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Apr. 20, 2013	Jun. 29, 2012
Document Information [Line Items]
Document Type	10-K/A
Amendment Flag	false
Document Period End Date	Dec. 31, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	FY
Entity Registrant Name	CEDAR FAIR L P
Entity Central Index Key	0000811532
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		0
Entity Unit, Unit Outstanding		55,618
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Public Float			$ 1,610,275,543