Pre-Tax Book Loss (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Pre-tax Income (Loss) [Line Items]
Income (loss) before income taxes	$ (5,181)	$ (94,242)
Domestic
Pre-tax Income (Loss) [Line Items]
Income (loss) before income taxes	(92,883)	(130,149)
Foreign
Pre-tax Income (Loss) [Line Items]
Income (loss) before income taxes	$ 87,702	$ 35,907