Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2021

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, 2021				December 31, 2020
	Cost		Fair Value		Cost		Fair Value
Cash and Cash Equivalents:
Cash and overnight deposits	$	959,848	$	959,848	$	602,112	$	602,112
Corporate commercial paper		795,587		795,643		872,287		872,350
Time deposits		64,671		64,671		53,392		53,392
Total cash and cash equivalents	$	1,820,106	$	1,820,162	$	1,527,791	$	1,527,854