Document and Entity Information Document	9 Months Ended
	Jul. 31, 2013	Sep. 16, 2013
Entity Information [Line Items]
Entity Registrant Name	Granite Falls Energy, LLC
Entity Central Index Key	0001181749
Current Fiscal Year End Date	--10-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q
Document Period End Date	Jul. 31, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		30,606