Marketable Securities (Tables)

6 Months Ended

Sep. 26, 2020

Marketable Securities [Abstract]

Schedule of Available-for-sale Securities

The following table is a summary of available-for-sale securities at September 26, 2020 (in thousands):

As of September 26, 2020	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value (Net Carrying Amount)
Corporate debt securities	$	342,943	$	6,136	$	(63)	$	349,016
Non-U.S. government securities	10,520		250		—		10,770
U.S. Treasury securities	1,263		18		—		1,281
Agency discount notes	3,824		5		—		3,829
Total securities	$	358,550	$	6,409	$	(63)	$	364,896

The following table is a summary of available-for-sale securities at March 28, 2020 (in thousands):

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As of March 28, 2020	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value (Net Carrying Amount)
Corporate debt securities	$	286,668	$	1,157	$	(3,993)	$	283,832
Non-U.S. government securities	12,483		260		—		12,743
U.S. Treasury securities	8,839		167		—		9,006
Total securities	$	307,990	$	1,584	$	(3,993)	$	305,581

Schedule of Cost and Estimated Fair Value of Available-for-sale Securities by Contractual Maturity

The cost and estimated fair value of available-for-sale securities by contractual maturities were as follows (in thousands):

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	September 26, 2020				March 28, 2020
	Amortized		Estimated		Amortized		Estimated
	Cost		Fair Value		Cost		Fair Value
Within 1 year	$	36,020	$	36,641	$	22,012	$	22,008
After 1 year	322,530		328,255		285,978		283,573
Total	$	358,550	$	364,896	$	307,990	$	305,581