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Restructuring and Related Charges - Schedule of Accrued Restructuring and Related Charges Activity (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restructuring Cost And Reserve [Line Items]
Restructuring and related charges	$ 4,358	$ 1,881	$ 124
Continuing Operations
Restructuring Cost And Reserve [Line Items]
Accrued restructuring and related charges liability	242
Restructuring and related charges	3,618
Payments	(1,936)
Accrued restructuring and related charges liability	1,924	242
Continuing Operations \| 2019 Restructuring Plan
Restructuring Cost And Reserve [Line Items]
Accrued restructuring and related charges liability	242
Restructuring and related charges	475	1,900
Payments	(606)
Accrued restructuring and related charges liability	111	$ 242
Continuing Operations \| 2020 COVID Restructuring Plan
Restructuring Cost And Reserve [Line Items]
Restructuring and related charges	816
Payments	(816)
Continuing Operations \| 2020 Restructuring Plan
Restructuring Cost And Reserve [Line Items]
Restructuring and related charges	2,327
Payments	(514)
Accrued restructuring and related charges liability	$ 1,813