Income Taxes - Summary of Provision for Income Taxes and Corresponding Effective Tax Rate (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income tax expense	$ 205	$ 5,548	$ 5,611	$ 12,443
(Loss) earnings before income tax	$ (10,117)	$ 8,299	$ 7,162	$ 23,608
Effective tax rate	(2.00%)	66.90%	78.30%	52.70%