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Document and Entity Information - USD ($)
 12 Months Ended
Feb. 01, 2020
Apr. 09, 2020
Aug. 02, 2019
Document And Entity Information      
Document Type 10-K    
Document Period End Date Feb. 01, 2020    
Entity Registrant Name SPORTSMAN'S WAREHOUSE HOLDINGS, INC.    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Accelerated Filer    
Entity Interactive Data Current Yes    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Common Stock, Shares Outstanding   43,298,934  
Entity Public Float     $ 169,032,443
Current Fiscal Year End Date --02-01    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001132105    
Amendment Flag false