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Document and Entity Information
 12 Months Ended
Mar. 30, 2013
Entity Information [Line Items]  
Document Type 20-F
Amendment Flag false
Document Period End Date Mar. 30, 2013
Document Fiscal Year Focus 2013
Document Fiscal Period Focus FY
Trading Symbol BMJ
Entity Registrant Name BIRKS & MAYORS INC.
Entity Central Index Key 0001179821
Current Fiscal Year End Date --03-30
Entity Well-known Seasoned Issuer No
Entity Current Reporting Status Yes
Entity Filer Category Non-accelerated Filer
Class A Common Stock [Member]
  
Entity Information [Line Items]  
Entity Common Stock, Shares Outstanding 7,115,641
Class B Common Stock [Member]
  
Entity Information [Line Items]  
Entity Common Stock, Shares Outstanding 7,717,970
Series A Preferred Stock [Member]
  
Entity Information [Line Items]  
Entity Common Stock, Shares Outstanding 0