v3.21.2
DEI Statement - shares
 9 Months Ended
Sep. 30, 2021
Nov. 03, 2021
Document Information [Line Items]    
Amendment Flag false  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus Q3  
Entity Central Index Key 0001781755  
Current Fiscal Year End Date --12-31  
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2021  
Document Transition Report false  
Entity File Number 001-39095  
Entity Registrant Name BRP GROUP, INC.  
Entity Incorporation, State or Country Code DE  
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  
Title of 12(b) Security Class A Common Stock, par value $0.01 per share  
Trading Symbol BRP  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company false  
Common Class A    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   56,932,244
Common Class B    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   55,281,957