Investments (Tables)

3 Months Ended

Jul. 01, 2018

Investments, Debt and Equity Securities [Abstract]

Schedule of Amortized Cost and Fair Value for Available-for-Sale Securities

The amortized cost and fair value of available-for-sale investments as of July 1, 2018 were as follows:

(in thousands)	Cost			Gross Unrealized  Gains		Gross Unrealized  Losses			Estimated Fair  Value
U.S. government treasuries and agencies securities	$	61,184		$	—	$	(896	)	$	60,288
Money market funds	26,979			—		—			26,979
Asset-backed securities	15,958			—		(93		)	15,865
Corporate bonds	111,135			37		(1,690		)	109,482
International government bonds	2,650			—		(6		)	2,644
Corporate commercial paper	10,683			—		—			10,683
Bank deposits	41,456			—		—			41,456
Repurchase agreements	291			—		—			291
Total available-for-sale investments	270,336			37		(2,685		)	267,688
Less amounts classified as cash equivalents	(69,500		)	—		—			(69,500		)
Short-term investments	$	200,836		$	37	$	(2,685	)	$	198,188

The amortized cost and fair value of available-for-sale investments as of April 1, 2018 were as follows:

(in thousands)	Cost			Gross Unrealized  Gains		Gross Unrealized  Losses			Estimated Fair  Value
U.S. government treasuries and agencies securities	$	61,166		$	—	$	(894	)	$	60,272
Money market funds	48,847			—		—			48,847
Asset-backed securities	16,797			—		(110		)	16,687
Corporate bonds	111,266			43		(1,704		)	109,605
International government bonds	2,650			—		(12		)	2,638
Corporate commercial paper	9,034			—		—			9,034
Bank deposits	45,080			—		—			45,080
Repurchase agreements	142			—		—			142
Total available-for-sale investments	294,982			43		(2,720		)	292,305
Less amounts classified as cash equivalents	(70,279		)	—		—			(70,279		)
Short-term investments	$	224,703		$	43	$	(2,720	)	$	222,026

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 as of July 1, 2018, by contractual maturity, were as follows:

(in thousands)	Amortized Cost		Estimated Fair Value
Due in 1 year or less	$	103,395	$	103,252
Due in 1-2 years	120,978		119,343
Due in 2-5 years	45,963		45,093
Total investments in available-for-sale securities	$	270,336	$	267,688

Schedule of Gross Unrealized Losses and Fair Value of Company's Investments With Unrealized Losses

The following table shows the gross unrealized losses and fair value of the Company’s investments with unrealized losses as of July 1, 2018, aggregated by investment category and length of time that individual securities have been in a continuous loss position.

	Less Than 12 Months					12 Months or Greater					Total
(in thousands)	Fair Value		Unrealized  Loss			Fair  Value		Unrealized  Loss			Fair Value		Unrealized  Loss
Corporate bonds	$	79,242	$	(1,358	)	$	23,324	$	(332	)	$	102,566	$	(1,690	)
Asset-backed securities	13,027		(77		)	2,340		(16		)	15,367		(93		)
U.S. government treasuries and agencies securities	25,348		(248		)	34,940		(648		)	60,288		(896		)
International government bonds						2,644		(6		)	2,644		(6		)
Total	$	117,617	$	(1,683	)	$	63,248	$	(1,002	)	$	180,865	$	(2,685	)

The following table shows the gross unrealized losses and fair value of the Company’s investments with unrealized losses, as of April 1, 2018, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position.

	Less Than 12 Months					12 Months or Greater					Total
(in thousands)	Fair  Value		Unrealized  Loss			Fair  Value		Unrealized  Loss			Fair  Value		Unrealized  Loss
Corporate bonds	$	78,726	$	(1,324	)	$	23,286	$	(380	)	$	102,012	$	(1,704	)
Asset-backed securities	14,147		(90		)	2,540		(20		)	16,687		(110		)
U.S. government treasuries and agencies securities	25,352		(221		)	34,920		(673		)	60,272		(894		)
International government bonds	—		—			2,638		(12		)	2,638		(12		)
Total	$	118,225	$	(1,635	)	$	63,384	$	(1,085	)	$	181,609	$	(2,720	)