| Cover Page | Mar. 13, 2020 |
| Cover page. | |
| Document Type | 8-K |
| Document Period End Date | Mar. 13, 2020 |
| Entity Registrant Name | Twin River Worldwide Holdings, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-38850 |
| Entity Tax Identification Number | 20-0904604 |
| Entity Address, Address Line One | 100 Westminster Street |
| Entity Address, City or Town | Providence |
| Entity Address, State or Province | RI |
| Entity Address, Postal Zip Code | 02903 |
| City Area Code | 401 |
| Local Phone Number | 475-8474 |
| 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 | TRWH |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | true |
| Entity Central Index Key | 0001747079 |
| Amendment Flag | false |
