Goodwill and Intangible Assets - Goodwill Rollforward (Details) $ in Thousands		3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2019 USD ($) segment
Goodwill
Beginning balance, goodwill		$ 817,600	$ 811,400	$ 865,900
Goodwill acquired during the period		38,800		140,100
Foreign currency translation adjustments and other		9,500	5,800	(12,800)
Purchase price adjustments			400	1,400
Ending balance, goodwill	$ 817,600	865,900	817,600	994,600	$ 811,400
Goodwill Impaired
Beginning Balance, accumulated goodwill impairment loss		129,000	129,000	129,000
Ending Balance, accumulated goodwill impairment loss	129,000	129,000	129,000	129,000	$ 129,000
Number of reportable segments | segment					4
L.A Turbine
Goodwill
Goodwill acquired during the period				42,100
Cryo Tank Solutions
Goodwill
Beginning balance, goodwill				93,200
Goodwill acquired during the period		0		0
Foreign currency translation adjustments and other		6,700		(8,300)
Purchase price adjustments				0
Ending balance, goodwill		93,200		84,900
Goodwill Impaired
Beginning Balance, accumulated goodwill impairment loss		0	0	23,500
Goodwill impaired reallocation amount		23,500
Ending Balance, accumulated goodwill impairment loss	0	23,500	0	23,500	$ 0
Cryo Tank Solutions | Specialty Products
Goodwill
Goodwill, transfers	43,300
Cryo Tank Solutions | D&S West
Goodwill
Goodwill, transfers	43,200
Heat Transfer Systems
Goodwill
Beginning balance, goodwill				435,200
Goodwill acquired during the period		0		2,900
Foreign currency translation adjustments and other		2,600		(4,500)
Purchase price adjustments				0
Ending balance, goodwill		435,200		433,600
Goodwill Impaired
Beginning Balance, accumulated goodwill impairment loss		0	0	49,300
Ending Balance, accumulated goodwill impairment loss	0	49,300	0	49,300	0
Heat Transfer Systems | E&C Cryogenics
Goodwill
Goodwill, transfers	137,000
Goodwill Impaired
Goodwill impaired reallocation amount		31,800
Heat Transfer Systems | E&C FinFans
Goodwill
Goodwill, transfers	295,600
Goodwill Impaired
Goodwill impaired reallocation amount		17,500
Heat Transfer Systems | L.A Turbine
Goodwill
Goodwill acquired during the period				2,900
Specialty Products
Goodwill
Beginning balance, goodwill				172,400
Goodwill acquired during the period		38,800		127,100
Foreign currency translation adjustments and other		(200)		0
Purchase price adjustments				1,400
Ending balance, goodwill		172,400		300,900
Goodwill Impaired
Beginning Balance, accumulated goodwill impairment loss		0	0	35,800
Ending Balance, accumulated goodwill impairment loss	0	35,800	0	35,800	0
Specialty Products | Specialty Products
Goodwill
Goodwill, transfers	64,600
Specialty Products | D&S West
Goodwill
Goodwill, transfers	63,600
Goodwill Impaired
Goodwill impaired reallocation amount		34,500
Specialty Products | E&C Cryogenics
Goodwill
Goodwill, transfers	5,600
Goodwill Impaired
Goodwill impaired reallocation amount		1,300
Specialty Products | L.A Turbine
Goodwill
Goodwill acquired during the period				29,100
Specialty Products | Cryo Technologies
Goodwill
Goodwill acquired during the period				34,900
Specialty Products | AdEdge
Goodwill
Goodwill acquired during the period				15,900
Specialty Products | Earthly Labs Inc.
Goodwill
Goodwill acquired during the period				47,200
Repair, Service & Leasing
Goodwill
Beginning balance, goodwill				165,100
Goodwill acquired during the period		0		10,100
Foreign currency translation adjustments and other		400		0
Purchase price adjustments				0
Ending balance, goodwill		165,100		175,200
Goodwill Impaired
Beginning Balance, accumulated goodwill impairment loss		0	0	20,400
Ending Balance, accumulated goodwill impairment loss	0	20,400	0	20,400	0
Repair, Service & Leasing | Specialty Products
Goodwill
Goodwill, transfers	13,600
Repair, Service & Leasing | D&S West
Goodwill
Goodwill, transfers	11,800
Goodwill Impaired
Goodwill impaired reallocation amount		6,400
Repair, Service & Leasing | E&C Cryogenics
Goodwill
Goodwill, transfers	33,600
Goodwill Impaired
Goodwill impaired reallocation amount		7,800
Repair, Service & Leasing | E&C FinFans
Goodwill
Goodwill, transfers	105,700
Goodwill Impaired
Goodwill impaired reallocation amount		6,200
Repair, Service & Leasing | L.A Turbine
Goodwill
Goodwill acquired during the period				10,100
Repair, Service & Leasing | BIG
Goodwill
Purchase price adjustments				1,400
Specialty Products
Goodwill
Beginning balance, goodwill		121,500	117,000
Foreign currency translation adjustments and other			4,500
Purchase price adjustments			0
Goodwill, transfers	(121,500)
Ending balance, goodwill	121,500		121,500		117,000
D&S West
Goodwill
Beginning balance, goodwill		118,600	118,600
Goodwill, transfers	(118,600)
Ending balance, goodwill	118,600		118,600		118,600
Goodwill Impaired
Beginning Balance, accumulated goodwill impairment loss		64,400	64,400	0
Goodwill impaired reallocation amount		64,400
Ending Balance, accumulated goodwill impairment loss	64,400	0	64,400		64,400
E&C Cryogenics
Goodwill
Beginning balance, goodwill		176,200	176,200
Goodwill, transfers	(176,200)
Ending balance, goodwill	176,200		176,200		176,200
Goodwill Impaired
Beginning Balance, accumulated goodwill impairment loss		40,900	40,900	0
Goodwill impaired reallocation amount		40,900
Ending Balance, accumulated goodwill impairment loss	40,900	0	40,900		40,900
E&C FinFans
Goodwill
Beginning balance, goodwill		401,300	399,600
Foreign currency translation adjustments and other			1,300
Purchase price adjustments			400
Goodwill, transfers	(401,300)
Ending balance, goodwill	401,300		401,300		399,600
Goodwill Impaired
Beginning Balance, accumulated goodwill impairment loss		23,700	23,700	$ 0
Goodwill impaired reallocation amount		23,700
Ending Balance, accumulated goodwill impairment loss	$ 23,700	$ 0	$ 23,700		$ 23,700