Other Current Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred compensation plans	$ 398,442	$ 311,708
Prepaid expenses	84,364	52,887
Other	42,768	37,990
Other current assets	$ 525,574	$ 402,585