Restructuring - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Restructuring Cost And Reserve [Line Items]
Restructuring expenses	$ (598,000)	$ 1,231,000	$ 3,168,000	$ 3,145,000
Impairment loss		9,885,000		20,369,000
Manufacturing Footprint Rationalization
Restructuring Cost And Reserve [Line Items]
Other restructuring costs	16,000		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			5,965,000
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	(1,691,000)		(1,443,000)
Restructuring reserve accelerated depreciation	200,000		442,000
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	860,000	860,000	3,914,000	1,259,000
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	$ 17,000	349,000	$ 239,000	349,000
Other Restructuring | GPT and CSZ-IC
Restructuring Cost And Reserve [Line Items]
Restructuring expenses		$ 22,000		$ 861,000