Document and Entity Information - USD ($)
12 Months Ended
Oct. 31, 2019
Dec. 13, 2019
Apr. 28, 2019
Cover [Abstract]      
Entity Registrant Name PHOTRONICS INC    
Entity Central Index Key 0000810136    
Current Fiscal Year End Date --10-31    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Shell Company false    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Public Float     $ 617,084,612
Entity Common Stock, Shares Outstanding   65,416,365  
Document Type 10-K    
Amendment Flag false    
Document Period End Date Oct. 31, 2019    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Document Annual Report true    
Document Transition Report false    
Entity File Number 0-15451    
Entity Tax Identification Number 06-0854886    
Entity Incorporation, State or Country Code CT    
Entity Address, Address Line One 15 Secor Road    
Entity Address, City or Town Brookfield    
Entity Address, State or Province CT    
Entity Address, Postal Zip Code 06804    
City Area Code 203    
Local Phone Number 775-9000    
Title of 12(b) Security COMMON    
Trading Symbol PLAB    
Security Exchange Name NASDAQ