Income Taxes - Components of Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Current tax provision	$ 24,022	$ 20,418	$ 30,459
Deferred tax (benefit) expense	(6,763)	2,854	(13,571)
Total provision for income taxes	$ 17,259	$ 23,272	$ 16,888