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Reportable Segments - Assets (Details) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Assets    
Assets $ 2,652.3 $ 2,570.5
Goodwill 911.3 865.9
Identifiable intangible assets, net 481.4 493.1
Cryo Tank Solutions    
Assets    
Goodwill 88.4 93.2
Heat Transfer Systems    
Assets    
Goodwill 432.6 435.2
Specialty Products    
Assets    
Goodwill 225.2 172.4
Repair, Service & Leasing    
Assets    
Goodwill 165.1 165.1
Operating Segments    
Assets    
Assets 984.1 967.3
Operating Segments | Cryo Tank Solutions    
Assets    
Assets 392.0 399.2
Operating Segments | Heat Transfer Systems    
Assets    
Assets 230.1 247.2
Operating Segments | Specialty Products    
Assets    
Assets 216.3 178.3
Operating Segments | Repair, Service & Leasing    
Assets    
Assets 145.7 142.6
Corporate    
Assets    
Assets $ 275.5 $ 244.2