| Document and Entity Information | Jan. 15, 2020 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001364099 |
| Document Type | 8-K |
| Document Period End Date | Jan. 15, 2020 |
| Entity Registrant Name | INNOPHOS HOLDINGS, INC. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-33124 |
| Entity Tax Identification Number | 20-1380758 |
| Entity Address, Address Line One | 259 Prospect Plains Road |
| Entity Address, City or Town | Cranbury |
| Entity Address, State or Province | NJ |
| Entity Address, Postal Zip Code | 08512 |
| City Area Code | 609 |
| Local Phone Number | 495-2495 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, $0.001 per share |
| Trading Symbol | IPHS |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
