Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Tax [Line Items]
Effective tax rate	20.20%	16.20%	13.90%	14.80%
Income tax expense (benefit)	$ 64,991	$ 43,387	$ 96,419	$ 108,091
Excess tax benefit recognized	$ 17,834	$ 27,604	$ 80,343	$ 86,809