| Cover Document | Nov. 16, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Nov. 16, 2020 |
| Entity Registrant Name | THIRD POINT REINSURANCE LTD. |
| Entity Incorporation, State or Country Code | D0 |
| Entity Tax Identification Number | 98-1039994 |
| Entity Address, Street Address | Point House |
| Entity Address, Street Address 2 | 3 Waterloo Lane |
| Entity Address, City | Pembroke |
| Entity Address, Postal Zip Code | HM 08 |
| Entity Address, Country | BM |
| City Area Code | 441 |
| Local Phone Number | 542-3300 |
| Written Communications | true |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of each class | Common Shares, $0.10 par value |
| Trading Symbol | TPRE |
| Name of each exchange on which registered | NYSE |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001576018 |
| Amendment Flag | false |
| Entity File Number | 001-36052 |
