Intangible Assets, Net - Summary of Carrying Amount of Intangible Assets by Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Beginning balance	$ 117,413	$ 131,883
Amortization	(14,348)	(14,473)
Other		3
Ending balance	103,065	117,413
Mobile Solutions
Finite-Lived Intangible Assets [Line Items]
Beginning balance	32,416	35,892
Amortization	(3,354)	(3,479)
Other		3
Ending balance	29,062	32,416
Power Solutions
Finite-Lived Intangible Assets [Line Items]
Beginning balance	84,997	95,991
Amortization	(10,994)	(10,994)
Other		0
Ending balance	$ 74,003	$ 84,997