Restructuring - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($) Facility
Restructuring Cost And Reserve [Line Items]
Restructuring expenses	$ 5,803,000	$ 12,919,000	$ 14,772,000
Impairment loss		21,206,000	11,476,000
Manufacturing Footprint Rationalization
Restructuring Cost And Reserve [Line Items]
Restructuring expenses	7,137,000
Other restructuring costs	332,000
Manufacturing Footprint Rationalization | Minimum
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost expected total cost	16,000,000
Manufacturing Footprint Rationalization | Maximum
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost expected total cost	19,000,000
Advanced Research and Development Rationalization and Site Consolidation
Restructuring Cost And Reserve [Line Items]
Restructuring expenses	4,669,000
Impairment loss		425,000
GPT and CSZ-IC
Restructuring Cost And Reserve [Line Items]
Restructuring expenses	2,303,000
Employee Separation Costs | Manufacturing Footprint Rationalization
Restructuring Cost And Reserve [Line Items]
Restructuring expenses	(832,000)	4,863,000
Restructuring reserve accelerated depreciation	687,000
Restructuring reserve accelerated depreciation		2,087,000
Employee Separation Costs | Manufacturing Footprint Rationalization | Minimum
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost expected total cost	6,500,000
Employee Separation Costs | Manufacturing Footprint Rationalization | Maximum
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost expected total cost	7,500,000
Employee Separation Costs | Other Restructuring Activities
Restructuring Cost And Reserve [Line Items]
Restructuring expenses	5,382,000	2,942,000	6,598,000
Employee Separation Costs | Advanced Research and Development Rationalization and Site Consolidation
Restructuring Cost And Reserve [Line Items]
Restructuring expenses			1,094,000
Employee Separation Costs | GPT and CSZ-IC
Restructuring Cost And Reserve [Line Items]
Restructuring expenses		251,000	757,000
Cash Expenditures | Manufacturing Footprint Rationalization | Minimum
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost expected total cost	13,000,000
Cash Expenditures | Manufacturing Footprint Rationalization | Maximum
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost expected total cost	16,000,000
Restructuring Capital Expenditures | Manufacturing Footprint Rationalization | Minimum
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost expected total cost	3,500,000
Restructuring Capital Expenditures | Manufacturing Footprint Rationalization | Maximum
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost expected total cost	4,500,000
Accelerated Depreciation and Impairment | Manufacturing Footprint Rationalization
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost expected total cost	3,000,000
Other Restructuring | Manufacturing Footprint Rationalization | Minimum
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost expected total cost	3,000,000
Other Restructuring | Manufacturing Footprint Rationalization | Maximum
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost expected total cost	4,000,000
Other Restructuring | Other Restructuring Activities
Restructuring Cost And Reserve [Line Items]
Restructuring expenses	$ 234,000	1,360,000	2,869,000
Other Restructuring | Advanced Research and Development Rationalization and Site Consolidation
Restructuring Cost And Reserve [Line Items]
Restructuring expenses			643,000
Other Restructuring | GPT and CSZ-IC
Restructuring Cost And Reserve [Line Items]
Restructuring expenses		$ 991,000	304,000
Loss on the Sale of Battery Management Systems | Advanced Research and Development Rationalization and Site Consolidation
Restructuring Cost And Reserve [Line Items]
Restructuring expenses			1,107,000
Asset Disposal Costs | Advanced Research and Development Rationalization and Site Consolidation
Restructuring Cost And Reserve [Line Items]
Restructuring expenses			$ 1,400,000
Facility Closing | Advanced Research and Development Rationalization and Site Consolidation
Restructuring Cost And Reserve [Line Items]
Number of leased facilities vacated | Facility			2