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Acquisitions - Additional Information (Details)
$ in Thousands, $ in Millions
May 20, 2025
USD ($)
employee
site
May 20, 2025
CAD ($)
Jan. 03, 2025
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2024
USD ($)
Business Combination [Line Items]          
Goodwill       $ 512,602 $ 287,362
Aerojet Ordnance Tennessee, Inc.          
Business Combination [Line Items]          
Business combination, consideration transferred     $ 103,300    
Goodwill     61,600    
Intangible assets     25,100    
Property, plant, and equipment     $ 13,000    
Kinectrics Holdings, Inc.          
Business Combination [Line Items]          
Goodwill $ 152,300        
Intangible assets 134,100        
Property, plant, and equipment 189,900        
Business combination, price of acquisition, expected   $ 782.7      
Business combination, consideration transferred, net of pension plan liabilities and indebtedness $ 441,400 $ 615.7      
Number of employees (over) | employee 1,300        
Number of sites | site 20        
Investments in unconsolidated affiliates $ 39,500        
Net working capital 23,500        
Pension liabilities and other postretirement obligations $ 91,600