Document and Entity Information	9 Months Ended
	May 31, 2012	Jun. 27, 2012
Document Information [Line Items]
Entity Registrant Name	SCHULMAN A INC
Entity Central Index Key	0000087565
Document Type	10-Q
Document Period End Date	May 31, 2012
Amendment Flag	false
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--08-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		29,539,675