v3.25.2
Stockholders' Equity - Narrative (Details)
$ / shares in Units, $ in Thousands
 1 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2025
USD ($)
vote
$ / shares
shares
Jun. 30, 2024
USD ($)
shares
Jun. 30, 2025
USD ($)
vote
$ / shares
shares
Jun. 30, 2024
USD ($)
shares
Jun. 30, 2025
USD ($)
vote
$ / shares
shares
Jun. 30, 2024
USD ($)
shares
Dec. 31, 2024
USD ($)
$ / shares
shares
Jul. 31, 2024
shares
Class of Stock [Line Items]                
Units owned (in shares) 345,815,692 341,070,926 345,815,692 341,070,926 345,815,692 341,070,926    
Preferred stock, shares authorized (in shares) 20,000,000   20,000,000   20,000,000      
Additional paid-in capital | $ $ 604,621   $ 604,621   $ 604,621   $ 603,780  
Non-controlling interest | $ 700 $ 1,200 700 $ 1,200 700 $ 1,200    
Distributions paid to non-controlling interest unit holders | $     $ 5,704 5,320 30,380 5,320    
THG LLC                
Class of Stock [Line Items]                
Dividends, preferred stock, cash | $ $ 5,600 5,600            
Distributions paid to non-controlling interest unit holders | $         30,400 5,300    
THG LLC | Hagerty, Inc.                
Class of Stock [Line Items]                
Distributions paid to non-controlling interest unit holders | $         $ 11,800 $ 1,100    
Class A Common Stock                
Class of Stock [Line Items]                
Common stock, shares authorized (in shares) 500,000,000   500,000,000   500,000,000   500,000,000  
Common stock, par value (in dollars per share) | $ / shares $ 0.0001   $ 0.0001   $ 0.0001   $ 0.0001  
Common stock, votes per share | vote 1   1   1      
Common stock, shares, issued (in shares) 90,715,648   90,715,648   90,715,648   90,032,391 3,876,201
Units owned (in shares) 90,715,648   90,715,648   90,715,648   90,032,391  
Stock issued during period, shares, new issues         78,302 131,524    
Additional paid-in capital | $ $ 700 1,200 $ 700 $ 1,200 $ 700 $ 1,200    
Class A Common Stock | 2021 Stock Incentive Plan                
Class of Stock [Line Items]                
Stock issued during period, shares, new issues         571,405 983,226    
Class A Common Stock | 2021 Employee Stock Purchase Plan                
Class of Stock [Line Items]                
Stock issued during period, shares, new issues         33,550 0    
Class V Common Stock                
Class of Stock [Line Items]                
Common stock, shares authorized (in shares) 300,000,000   300,000,000   300,000,000   300,000,000  
Common stock, par value (in dollars per share) | $ / shares $ 0.0001   $ 0.0001   $ 0.0001   $ 0.0001  
Common stock, votes per share | vote 10   10   10      
Common stock, shares, issued (in shares) 251,033,906   251,033,906   251,033,906   251,033,906  
Units owned (in shares) 251,033,906   251,033,906   251,033,906   251,033,906  
Common stock, conversion ratio         1      
Convertible Preferred Stock                
Class of Stock [Line Items]                
Preferred stock, par value (in dollars per share) | $ / shares $ 0.0001   $ 0.0001   $ 0.0001      
Series A Convertible Preferred Stock                
Class of Stock [Line Items]                
Preferred stock, shares outstanding (in shares) 8,483,561   8,483,561   8,483,561   8,483,561  
Preferred stock, shares issued (in shares) 8,483,561   8,483,561   8,483,561   8,483,561  
Dividends, preferred stock, cash | $ $ 5,600 $ 5,600