| DEI Document | Nov. 30, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K/A |
| Amendment Flag | true |
| Document Period End Date | Nov. 30, 2020 |
| Entity Registrant Name | BRP Group, Inc. |
| Entity Central Index Key | 0001781755 |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-39095 |
| Entity Tax Identification Number | 61-1937225 |
| Entity Address, Address Line One | 4211 W. Boy Scout Blvd. |
| Entity Address, Address Line Two | Suite 800 |
| Entity Address, City or Town | Tampa |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 33607 |
| City Area Code | 866 |
| Local Phone Number | 279-0698 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class A Common Stock, par value $0.01 per share |
| Trading Symbol | BRP |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
