v3.26.1
Acquisitions - Schedule of Consideration Transferred (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 01, 2026
Jan. 02, 2026
Oct. 01, 2025
Mar. 31, 2026
Dec. 31, 2025
Total 2026 Acquisitions          
Business Combination [Line Items]          
Cash       $ 308,285  
Issuance of Legence Corp. Class A Common Stock       106,437  
Contract liabilities       44,941  
Holdback       299  
Total consideration transferred       459,962  
Bowers          
Business Combination [Line Items]          
Cash   $ 283,104      
Issuance of Legence Corp. Class A Common Stock   98,635      
Contract liabilities   44,941      
Holdback   0      
Total consideration transferred   $ 426,680      
Metrix          
Business Combination [Line Items]          
Cash $ 25,181        
Issuance of Legence Corp. Class A Common Stock 7,802        
Contract liabilities 0        
Holdback 299        
Total consideration transferred $ 33,282        
Total 2025 Acquisitions          
Business Combination [Line Items]          
Cash         $ 16,211
Issuance of Legence Corp. Class A Common Stock         4,038
Holdback         1,250
Purchase price receivable         (37)
Total consideration transferred       $ 21,500 21,462
IMD          
Business Combination [Line Items]          
Cash     $ 9,302    
Issuance of Legence Corp. Class A Common Stock     3,589    
Holdback     1,000    
Purchase price receivable     (37)    
Total consideration transferred     $ 13,854    
Other 2025 Acquisition          
Business Combination [Line Items]          
Cash         6,909
Issuance of Legence Corp. Class A Common Stock         449
Holdback         250
Purchase price receivable         0
Total consideration transferred         $ 7,608