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DOCUMENT AND ENTITY INFORMATION - USD ($)
 12 Months Ended
Mar. 31, 2018
May 21, 2018
Sep. 30, 2017
Document And Entity Information [Abstract]      
Entity Registrant Name HAEMONETICS CORP    
Entity Central Index Key 0000313143    
Current Fiscal Year End Date --03-31    
Entity Filer Category Large Accelerated Filer    
Document Type 10-K    
Document Period End Date Mar. 31, 2018    
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY    
Amendment Flag false    
Entity Common Stock, Shares Outstanding   52,206,831  
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Public Float     $ 2,354,214,975