| Cover Page | Jul. 01, 2020 | May 19, 2020 | Jan. 30, 2020 |
| Cover [Abstract] | |||
| Document Type | 8-K | ||
| Document Period End Date | Jul. 1, 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 | ||
| Document Information [Line Items] | |||
| Document Period End Date | Jul. 1, 2020 |
