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Reportable Segments - Assets (Details) - USD ($)
$ in Millions
Sep. 30, 2021
Dec. 31, 2020
Assets    
Assets $ 2,981.8 $ 2,570.5
Goodwill 952.7 865.9
Identifiable intangible assets, net 538.0 493.1
Cryo Tank Solutions    
Assets    
Goodwill 87.1 93.2
Heat Transfer Systems    
Assets    
Goodwill 434.8 435.2
Specialty Products    
Assets    
Goodwill 255.6 172.4
Repair, Service & Leasing    
Assets    
Goodwill 175.2 165.1
Operating Segments    
Assets    
Assets 1,166.3 967.3
Operating Segments | Cryo Tank Solutions    
Assets    
Assets 382.0 399.2
Operating Segments | Heat Transfer Systems    
Assets    
Assets 228.9 247.2
Operating Segments | Specialty Products    
Assets    
Assets 371.5 178.3
Operating Segments | Repair, Service & Leasing    
Assets    
Assets 183.9 142.6
Corporate    
Assets    
Assets $ 324.8 $ 244.2