Income Tax - Components of Income Tax Expense (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Current tax provision	$ 5,598	$ 4,691
Deferred tax benefit	(1,080)	(882)
Income tax expense	$ 4,518	$ 3,809