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DOCUMENT AND ENTITY INFORMATION	3 Months Ended
	Dec. 27, 2014	Jan. 23, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	KULICKE & SOFFA INDUSTRIES INC
Entity Central Index Key	0000056978
Current Fiscal Year End Date	--10-03
Entity Filer Category	Large Accelerated Filer
Trading Symbol	klic
Entity Common Stock, Shares Outstanding		76,771,266dei_EntityCommonStockSharesOutstanding
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Dec. 27, 2014
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2015

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