Marketable Securities (Tables)

12 Months Ended

Mar. 31, 2022

Investments, Debt and Equity Securities [Abstract]

Schedule of Marketable Securities

a.Marketable securities:

	March 31,
	2022		2021
Short-term marketable securities	$	522,028	$	418,480
Long-term marketable securities		435,189		557,209
	$	957,217	$	975,689

Summary of Both Short-Term and Long-Term Marketable Securities

b.The following is a summary of both short-term and long-term marketable securities by type:

	March 31,
	2022										2021
	Amortized Cost		Gross Unrealized Gain (Loss) through Other Comprehensive Income			Gross Unrealized Gain (Loss) through Profit & Loss			Market Value		Amortized Cost		Gross Unrealized Gain (Loss) through Other Comprehensive Income		Gross Unrealized Gain (Loss) through Profit & Loss		Market Value
Marketable securities:
Corporate bonds	$	743,624	$	(11,840	)	$	—		$	731,784	$	679,315	$	4,823	$	—	$	684,138
Government securities		106,235		(531	)		—			105,703		146,057		249		—		146,306
Commercial paper		22,678		(121	)		—			22,557		47,934		4		—		47,938
Preferred stock - debt instrument		2,685		(235	)		—			2,449		2,990		44		—		3,033
Preferred stock - equity instrument		11,649		—			(1,616	)		10,034		10,475		—		77		10,553
Certificates of deposit		46,296		(144	)		—			46,152		42,897		27		—		42,924
Municipal bonds		26,683		(276	)		—			26,408		23,479		82		—		23,562
Other securities		12,261		(132	)		—			12,129		17,115		120		—		17,235
Total marketable securities	$	972,111	$	(13,279	)	$	(1,616	)	$	957,217	$	970,262	$	5,350	$	77	$	975,689

Estimated Fair Value of Marketable Securities by Contractual Maturity

c.The estimated fair value of marketable securities as of March 31, 2022 and 2021, by contractual maturity, are as follows:

	March 31,
	2022				2021
	Amortized		Market		Amortized		Market
	Cost		Value		Cost		Value
Available-for-sale marketable securities:
Matures in less than five years	$	953,150	$	940,212	$	956,797	$	962,103
Matures in more than five years		7,312		6,971		2,990		3,033
		960,462		947,183		959,787		965,136
Investment at fair value through Profit & Loss		11,649		10,034		10,475		10,553
	$	972,111	$	957,217	$	970,262	$	975,689