Marketable Securities (Tables)

12 Months Ended

Mar. 30, 2019

Marketable Securities [Abstract]

Schedule of Available-for-sale Securities

The following table is a summary of available-for-sale securities (in thousands):

As of March 30, 2019	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value (Net Carrying Amount)
Corporate debt securities	$	215,098	$	1,027	$	(600	)	$	215,525
Non-US government securities	13,209		8		(40		)	13,177
Agency discount notes	450		—		(1		)	449
Total securities	$	228,757	$	1,035	$	(641	)	$	229,151

As of March 31, 2018	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value (Net Carrying Amount)
Corporate debt securities	$	185,636	$	4	$	(2,318	)	$	183,322
Non-US government securities	14,730		—		(111		)	14,619
Certificates of deposit	500		—		—			500
Agency discount notes	459		—		(4		)	455
Total securities	$	201,325	$	4	$	(2,433	)	$	198,896

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 investments by contractual maturity were as follows:

	March 30, 2019				March 31, 2018
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Within 1 year	$	70,490	$	70,183	$	26,560	$	26,397
After 1 year	158,267		158,968		174,765		172,499
Total	$	228,757	$	229,151	$	201,325	$	198,896