Income Taxes - Income Tax Expense (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Current income tax expense (benefit)	$ 29,412	$ 14,999
Deferred income tax expense (benefit)	(26,089)	(1,044)
Income tax expense, as reported	$ 3,323	$ 13,955
Effective tax rate	5.70%	10.70%