v3.26.1
Loss Per Share - Schedule of Net Loss Per Share, Basic and Diluted (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]    
Net loss $ (192,354) $ (155,093)
Less: Net loss attributable to noncontrolling interests (53,733) (47,865)
Net loss attributable to Definitive Healthcare Corp. (138,621) (107,228)
Basic net loss per share attributable to common stockholders [Abstract]    
Allocation of net loss attributable to Definitive Healthcare Corp. $ (138,621) $ (107,228)
Weighted average number of shares of Class A outstanding 104,675,068 112,782,505
Net loss per share, basic $ (1.32) $ (0.95)
Net loss per share, diluted $ (1.32) $ (0.95)
Common Class A [Member]    
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]    
Net loss $ (192,354) $ (155,093)
Less: Net loss attributable to noncontrolling interests (53,733) (47,865)
Net loss attributable to Definitive Healthcare Corp. (138,621) (107,228)
Basic net loss per share attributable to common stockholders [Abstract]    
Allocation of net loss attributable to Definitive Healthcare Corp. $ (138,621) $ (107,228)
Weighted average number of shares of Class A outstanding 104,675,068 112,782,505
Net loss per share, basic $ (1.32) $ (0.95)
Net loss per share, diluted $ (1.32) $ (0.95)