Other Current Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred compensation plans	$ 418,074	$ 398,442
Prepaid expenses	87,597	84,364
Other	47,583	42,768
Other current assets	$ 553,254	$ 525,574