v3.6.0.2
Document and Entity Information - USD ($)
12 Months Ended
Jan. 28, 2017
Mar. 24, 2017
Jul. 29, 2016
Document And Entity Information [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Jan. 28, 2017    
Document Fiscal Year Focus 2016    
Document Fiscal Period Focus FY    
Entity Registrant Name SPORTSMAN'S WAREHOUSE HOLDINGS, INC.    
Entity Central Index Key 0001132105    
Current Fiscal Year End Date --01-28    
Entity Filer Category Accelerated Filer    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Public Float     $ 325,173,327
Entity Common Stock, Shares Outstanding   42,269,940  
Entity Current Reporting Status Yes