Restructuring - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Restructuring Cost And Reserve [Line Items]
Restructuring expenses	$ 284,000	$ 8,664,000	$ 3,452,000	$ 11,809,000
Impairment loss		837,000		21,206,000
Manufacturing Footprint Rationalization
Restructuring Cost And Reserve [Line Items]
Other restructuring costs	0		16,000
Manufacturing Footprint Rationalization | Minimum
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost expected total cost	16,000,000		16,000,000
Manufacturing Footprint Rationalization | Maximum
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost expected total cost	19,000,000		19,000,000
Advanced Research and Development Rationalization and Site Consolidation
Restructuring Cost And Reserve [Line Items]
Restructuring expenses			6,203,000
Other Restructuring Activities
Restructuring Cost And Reserve [Line Items]
Impairment loss		0		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	116,000	5,200,000	(1,327,000)
Restructuring reserve accelerated depreciation	122,000		564,000
Restructuring reserve accelerated depreciation		1,612,000
Employee Separation Costs | Manufacturing Footprint Rationalization | Minimum
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost expected total cost	6,500,000		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		7,500,000
Employee Separation Costs | Other Restructuring Activities
Restructuring Cost And Reserve [Line Items]
Restructuring expenses	64,000	1,467,000	3,978,000	2,726,000
Employee Separation Costs | GPT and CSZ-IC
Restructuring Cost And Reserve [Line Items]
Restructuring expenses		0		251,000
Cash Expenditures | Manufacturing Footprint Rationalization | Minimum
Restructuring Cost And Reserve [Line Items]
Restructuring and related cost expected total cost	13,000,000		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		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		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		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		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		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		4,000,000
Other Restructuring | Other Restructuring Activities
Restructuring Cost And Reserve [Line Items]
Restructuring expenses	$ (18,000)	385,000	$ 221,000	734,000
Other Restructuring | GPT and CSZ-IC
Restructuring Cost And Reserve [Line Items]
Restructuring expenses		$ 0		$ 861,000