Significant Accounting Policies - Change in Restructuring Liability Associated with the Plan (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)
Restructuring Reserve [Roll Forward]
Costs incurred	$ 14,115
Payments	(12,225)
Adjustments	(398)
Other	(306)	[1]
Balance at December 31, 2021	$ 1,186

[1] Represents the acceleration of expense associated with the vesting of certain equity awards.