v3.26.3
Acquisitions - Summary of Fair Value of Consideration Transferred for the Merger (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended
Jun. 01, 2026
USD ($)
$ / shares
shares
Sep. 30, 2026
USD ($)
Jun. 30, 2026
USD ($)
May 29, 2026
$ / shares
Business Combination, Consideration Transferred, Equity Interest [Line Items]        
Cash Issued to Maximum Aggregate Stock Shares   $ 1 $ 1,792,592  
Fractional Shares | shares 68      
Total Merger Consideration per the Merger Agreement $ 2,110,069      
Pre-combination value of replaced Thermon equity awards 11,609      
Cash settlement of Thermon equity awards 2,111      
Repayment of Thermon indebtedness 141,682      
Less: D&O "tail" insurance premium (1,371)      
Total preliminary consideration transferred 2,264,100      
Mixed Consideration        
Business Combination, Consideration Transferred, Equity Interest [Line Items]        
Total Consideration 1,103,766      
Cash Consideration        
Business Combination, Consideration Transferred, Equity Interest [Line Items]        
Total Consideration 157,085      
Stock Consideration        
Business Combination, Consideration Transferred, Equity Interest [Line Items]        
Total Consideration $ 849,150      
Thermon Group Holdings, Inc.        
Business Combination, Consideration Transferred, Equity Interest [Line Items]        
Consideration received per share | $ / shares $ 79.03     $ 61.14
Total preliminary consideration transferred $ 2,264,100      
Thermon Group Holdings, Inc. | Mixed Consideration | Stock Component        
Business Combination, Consideration Transferred, Equity Interest [Line Items]        
Number of Common Stock Shares Issued | shares 17,231,130      
Exchange ratio per Merger Agreement 0.684      
Thermon Group Holdings, Inc. | Mixed Consideration | Cash Component        
Business Combination, Consideration Transferred, Equity Interest [Line Items]        
Number of Common Stock Shares Issued | shares 17,231,130      
Consideration in the form of CECO's Common Stock $ 172,311      
Consideration received per share | $ / shares $ 10      
Thermon Group Holdings, Inc. | Cash Consideration        
Business Combination, Consideration Transferred, Equity Interest [Line Items]        
Number of Common Stock Shares Issued | shares 2,142,408      
Consideration received per share | $ / shares $ 63.89      
All-Cash Consideration $ 136,878      
Cash Issued to Maximum Aggregate Stock Shares $ 20,207      
Thermon Group Holdings, Inc. | Stock Consideration        
Business Combination, Consideration Transferred, Equity Interest [Line Items]        
Number of Common Stock Shares Issued | shares 13,566,156      
Exchange ratio per Merger Agreement 0.811      
CECO Environmental Corp | Mixed Consideration | Stock Component        
Business Combination, Consideration Transferred, Equity Interest [Line Items]        
Number of Common Stock Shares Issued | shares 11,786,093      
Common Stock Closing Price | $ / shares $ 79.03      
Consideration in the form of CECO's Common Stock $ 931,455      
CECO Environmental Corp | Stock Consideration        
Business Combination, Consideration Transferred, Equity Interest [Line Items]        
Number of Common Stock Shares Issued | shares 11,002,153      
Common Stock Closing Price | $ / shares $ 79.03      
Less: CECO Common Stock shares due to Maximum Aggregate Stock Shares proration per the Merger Agreement | shares (257,495)      
Number of CECO Common Stock shares to be issued pursuant to the Maximum Aggregate Stock Shares proration per the Merger Agreement | shares 10,744,658