Reportable Segments - Segment Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Segment Reporting Information
Sales	$ 537.9	$ 354.1
Depreciation and amortization expense	33.3	20.5
Operating income (loss)	36.2	20.1
Restructuring costs	1.6	0.1
Change in acquisition-related contingent consideration	(7.4)
Sustainable Energy Solutions, Inc. (“SES”) and BlueInGreen, LLC (“BIG”)
Segment Reporting Information
Change in acquisition-related contingent consideration	(7.4)	(0.8)
Operating Segments | Cryo Tank Solutions
Segment Reporting Information
Sales	127.2	118.1
Depreciation and amortization expense	5.6	4.1
Operating income (loss)	4.9	14.1
Restructuring costs	0.8	0.0
Operating Segments | Heat Transfer Systems
Segment Reporting Information
Sales	167.5	79.3
Depreciation and amortization expense	8.4	7.7
Operating income (loss)	27.3	(0.2)
Restructuring costs	0.0	0.1
Operating Segments | Specialty Products
Segment Reporting Information
Sales	127.3	107.5
Depreciation and amortization expense	8.6	3.9
Operating income (loss)	22.1	16.2
Restructuring costs	0.0	0.0
Operating Segments | Repair, Service & Leasing
Segment Reporting Information
Sales	120.1	49.3
Depreciation and amortization expense	9.9	4.3
Operating income (loss)	33.8	8.3
Restructuring costs	0.8	0.0
Intersegment Eliminations
Segment Reporting Information
Sales	(4.2)	(0.1)
Depreciation and amortization expense	0.0	0.0
Operating income (loss)	0.0	0.0
Corporate
Segment Reporting Information
Sales	0.0	0.0
Depreciation and amortization expense	0.8	0.5
Operating income (loss)	(51.9)	(18.3)
Restructuring costs	$ 0.0	$ 0.0