Income Taxes - (Loss) Earnings Before Income Taxes and Tax Provisions - (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
(Loss) earnings before income tax:
Domestic	$ (11,374)	$ 74,531	$ 10,092
Foreign	92,930	(15,380)	48,027
Earnings before income tax	$ 81,556	$ 59,151	$ 58,119