| Cover | Aug. 13, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Aug. 13, 2020 |
| Current Fiscal Year End Date | --12-31 |
| Entity File Number | 001-34025 |
| Entity Registrant Name | Intrepid Potash, Inc. |
| Entity Central Index Key | 0001421461 |
| Entity Tax Identification Number | 26-1501877 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 1001 17th Street |
| Entity Address, Address Line Two | Suite 1050 |
| Entity Address, City or Town | Denver |
| Entity Address, State or Province | CO |
| Entity Address, Postal Zip Code | 80202 |
| City Area Code | 303 |
| Local Phone Number | 296-3006 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.001 par value |
| Trading Symbol | IPI |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
