Restructuring Costs - Reconciliation of Accrued Restructuring Costs (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 500,000	$ 2,300,000
Restructuring expense incurred	400,000	900,000
Cash payments	(300,000)	(1,500,000)
Ending Balance	600,000	1,700,000
2017 Altra Plan [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance		500,000
Restructuring expense incurred	0
Cash payments		(100,000)
Ending Balance		400,000
2019 Altra Plan [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	500,000	1,800,000
Restructuring expense incurred	400,000	900,000
Cash payments	(300,000)	(1,400,000)
Ending Balance	$ 600,000	$ 1,300,000