Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Tax [Line Items]
Effective tax rate	21.80%	14.10%	8.50%	14.00%
Income tax expense (benefit)	$ 45,756	$ 34,503	$ 31,428	$ 64,704
Excess tax benefit recognized	$ 6,854	$ 30,727	$ 62,509	$ 59,205