Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2020

Fair Value Disclosures [Abstract]

Schedule of Fair Value of Cash and Cash Equivalents by Balance Sheet Grouping

Cash and cash equivalents consist of the following:

	September 30, 2020				December 31, 2019
	Cost		Fair Value		Cost		Fair Value
Cash and Cash Equivalents:
Cash and overnight deposits	$	558,886	$	558,886	$	417,456	$	417,456
Corporate commercial paper		873,725		873,727		775,504		776,356
Time deposits		32,899		32,899		37,531		37,531
Total cash and cash equivalents	$	1,465,510	$	1,465,512	$	1,230,491	$	1,231,343