v3.8.0.1
Document and Entity Information - shares
9 Months Ended
Sep. 30, 2017
Oct. 26, 2017
Document and Entity Information [Abstract]    
Entity Registrant Name Intrepid Potash, Inc.  
Entity Central Index Key 0001421461  
Document Type 10-Q  
Document Period End Date Sep. 30, 2017  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Entity Well-known Seasoned Issuer No  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding   130,771,109
Document Fiscal Year Focus 2017  
Document Fiscal Period Focus Q3