| Cover Cover | Mar. 31, 2020 |
| Entity Information [Line Items] | |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | IDA |
| Document Type | 8-K |
| Document Period End Date | Mar. 31, 2020 |
| Entity File Number | 1-14465 |
| Entity Registrant Name | IDACORP, Inc. |
| Entity Tax Identification Number | 82-0505802 |
| Entity Address, Address Line One | 1221 W. Idaho Street |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Address, City or Town | Boise |
| Entity Address, State or Province | ID |
| Entity Address, Postal Zip Code | 83702-5627 |
| City Area Code | 208 |
| Local Phone Number | 388-2200 |
| Entity Incorporation, State or Country Code | ID |
| Security Exchange Name | NYSE |
| Amendment Flag | false |
| Entity Central Index Key | 0001057877 |
| Idaho Power Company | |
| Entity Information [Line Items] | |
| Entity File Number | 1-3198 |
| Entity Registrant Name | Idaho Power Company |
| Entity Tax Identification Number | 82-0130980 |
| Amendment Flag | false |
| Entity Central Index Key | 0000049648 |
