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Reportable Segments - Segment Income (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Segment Reporting Information    
Sales to external customers $ 1,001.5 $ 950.7
Cost of sales 661.7 648.4
Selling, general and administrative expenses 141.0 141.5
Amortization expense 46.5 47.9
Operating income (loss) 152.3 112.9
Depreciation expense 19.7 18.0
Operating Segments | Cryo Tank Solutions    
Segment Reporting Information    
Sales to external customers 153.2 159.7
Cost of sales 116.0 126.9
Selling, general and administrative expenses 17.7 16.9
Amortization expense 1.9 1.9
Operating income (loss) 17.6 14.0
Depreciation expense 4.3 3.4
Operating Segments | Heat Transfer Systems    
Segment Reporting Information    
Sales to external customers 267.3 253.6
Cost of sales 184.7 183.5
Selling, general and administrative expenses 10.8 13.9
Amortization expense 4.9 5.0
Operating income (loss) 66.9 51.2
Depreciation expense 4.1 4.2
Operating Segments | Specialty Products    
Segment Reporting Information    
Sales to external customers 276.1 236.5
Cost of sales 192.4 177.6
Selling, general and administrative expenses 30.4 28.7
Amortization expense 5.0 5.1
Operating income (loss) 48.3 25.1
Depreciation expense 5.0 2.0
Operating Segments | Repair, Service & Leasing    
Segment Reporting Information    
Sales to external customers 304.9 301.0
Cost of sales 168.6 160.5
Selling, general and administrative expenses 38.9 39.5
Amortization expense 34.7 35.9
Operating income (loss) 62.7 65.1
Depreciation expense 3.6 7.1
Intersegment Eliminations    
Segment Reporting Information    
Sales to external customers 0.0 (0.1)
Cost of sales 0.0 (0.1)
Selling, general and administrative expenses 0.0 0.0
Amortization expense 0.0 0.0
Operating income (loss) 0.0 0.0
Depreciation expense 0.0 0.0
Corporate    
Segment Reporting Information    
Sales to external customers 0.0 0.0
Cost of sales 0.0 0.0
Selling, general and administrative expenses 43.2 42.5
Amortization expense 0.0 0.0
Operating income (loss) (43.2) (42.5)
Depreciation expense $ 2.7 $ 1.3