Restructuring - Schedule of Reconciliation of Restructuring Liability (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring And Related Activities [Abstract]
Balance at beginning of period	$ 185	$ 205
Plus: Amounts charged to cost and expense	6,014	7,261	$ 274
Less: Amounts paid	(4,631)	(7,281)
Balance at end of period	$ 1,568	$ 185	$ 205