v3.7.0.1
DOCUMENT AND ENTITY INFORMATION - shares
6 Months Ended
Apr. 01, 2017
May 02, 2017
Document and Entity Information [Abstract]    
Entity Registrant Name KULICKE & SOFFA INDUSTRIES INC  
Entity Central Index Key 0000056978  
Current Fiscal Year End Date --09-30  
Entity Filer Category Large Accelerated Filer  
Trading Symbol klic  
Entity Common Stock, Shares Outstanding   70,986,049
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Apr. 01, 2017  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2017