Income Taxes - Summary of Provision for Income Taxes and Corresponding Effective Tax Rate (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income tax expense	$ 9,603	$ 6,771	$ 15,214	$ 19,214
Earnings before income tax	$ 33,749	$ 22,658	$ 40,911	$ 46,266
Effective tax rate	28.50%	29.90%	37.20%	41.50%