Income Taxes - Provision for Income Taxes and Effective Income Tax Rates (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]
(Benefit) provision for income taxes	$ (406)	$ 113	$ (900)	$ 539
Effective income tax rate	(17.90%)	4.20%	(2195.10%)	7.30%