Annual report pursuant to Section 13 and 15(d)

Related Parties - Additional Information (Detail)

v3.22.0.1
Related Parties - Additional Information (Detail) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Mar. 31, 2021
Jan. 01, 2021
Mar. 05, 2020
Jun. 13, 2019
Mar. 31, 2021
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Mar. 31, 2020
Jul. 01, 2019
Related Party Transaction [Line Items]                        
Total consideration transferred, net of cash acquired                   $ 151,600    
Working capital true-up payment           $ 100,000            
Total invested capital               $ 45,417,000 $ 47,216,000 22,522,000    
Capital contribution     $ 23,500,000                  
Expense related to business usage of the aircraft               700,000 700,000 900,000    
Non-recurring guarantee               10,000,000.0        
Ryan Re Services Agreement With Geneva Re And Nationwide [Member]                        
Related Party Transaction [Line Items]                        
Insurance Agency Management Fee               115,000 2,500      
Revenue earned from Geneva Re               1,700,000 2,000,000.0      
Receivables due from Geneva Re               $ 4,200,000 3,000,000.0      
Geneva Ryan Holdings [Member]                        
Related Party Transaction [Line Items]                        
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners       53.00%                
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage 53.00%                      
Ryan Specialty Group, LLC [Member]                        
Related Party Transaction [Line Items]                        
Total consideration transferred, net of cash acquired $ 48,400,000                      
Common stock, Par value       $ 1             $ 1  
Shares Issued, Price Per Share       $ 4.70                
Derecognized the non-controlling interest         $ 3,700,000              
Recognized a deemed distribution             $ 44,600,000          
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage       47.00%                
Geneva Re [Member]                        
Related Party Transaction [Line Items]                        
Equity Method Investment, Ownership Percentage               50.00%        
Total invested capital               $ 47,000,000.0        
Equity Method Investment, Aggregate Cost               50,000,000.0        
Capital contribution     $ 23,500,000                  
Related Party Transaction, Due from (to) Related Party               $ 500,000 400,000      
Ryan Re [Member]                        
Related Party Transaction [Line Items]                        
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage 53.00%                      
JEM Underwriting Managers, LLC [Member]                        
Related Party Transaction [Line Items]                        
Total consideration transferred, net of cash acquired   $ 4,000,000.0                    
Ryan Investment Holdings | Geneva Ryan Holdings [Member]                        
Related Party Transaction [Line Items]                        
Equity Method Investment, Ownership Percentage               53.00%        
Ryan Investment Holdings | Ryan Specialty Group, LLC [Member]                        
Related Party Transaction [Line Items]                        
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners               47.00%       47.00%
Total invested capital               $ 47,000,000.0       $ 23,500,000
Michael O Halleran [Member] | Consulting Arrangement with Director [Member]                        
Related Party Transaction [Line Items]                        
Related party transaction               200,000 200,000 100,000    
Immediate Family Member of Director [Member]                        
Related Party Transaction [Line Items]                        
Related party transaction               300,000 300,000 300,000    
Production bonus               $ 100,000 $ 200,000 $ 100,000