| Document and Entity Information | Feb. 23, 2021 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001580905 |
| Document Type | 8-K |
| Document Period End Date | Feb. 23, 2021 |
| Entity Registrant Name | Installed Building Products, Inc. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-36307 |
| Entity Tax Identification Number | 45-3707650 |
| Entity Address, Address Line One | 495 South High Street |
| Entity Address, Address Line Two | Suite 50 |
| Entity Address, City or Town | Columbus |
| Entity Address, State or Province | OH |
| Entity Address, Postal Zip Code | 43215 |
| City Area Code | (614) |
| Local Phone Number | 221-3399 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common stock |
| Trading Symbol | IBP |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
