v3.5.0.2
DOCUMENT AND ENTITY INFORMATION - USD ($)
$ in Millions
12 Months Ended
Oct. 01, 2016
Nov. 15, 2016
Apr. 02, 2016
Document and Entity Information [Abstract]      
Entity Registrant Name KULICKE & SOFFA INDUSTRIES INC    
Entity Central Index Key 0000056978    
Current Fiscal Year End Date --10-01    
Entity Filer Category Large Accelerated Filer    
Trading Symbol klic    
Entity Common Stock, Shares Outstanding   70,881,792  
Document Type 10-K    
Amendment Flag false    
Document Period End Date Oct. 01, 2016    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2016    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Public Float     $ 791.7