| Document And Entity Information | Aug. 31, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Aug. 31, 2021 |
| Entity Registrant Name | INSTRUCTURE HOLDINGS, INC. |
| Entity Central Index Key | 0001841804 |
| Entity Emerging Growth Company | false |
| Entity File Number | 001-40647 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 84-4325548 |
| Entity Address, Address Line One | 6330 SOUTH 3000 EAST |
| Entity Address, Address Line Two | SUITE 700 |
| Entity Address, City or Town | SALT LAKE CITY |
| Entity Address, State or Province | UT |
| Entity Address, Postal Zip Code | 84121 |
| City Area Code | 800 |
| Local Phone Number | 203-6755 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.01 par value |
| Trading Symbol | INST |
| Security Exchange Name | NYSE |
