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Investments (Tables)
 3 Months Ended
Jul. 02, 2017
Investments, Debt and Equity Securities [Abstract]  
Available-for-sale investments
The amortized cost and fair value of available-for-sale investments as of July 2, 2017 were as follows:
 
(in thousands)
Cost
 
Gross
Unrealized
 Gains
 
Gross
Unrealized
 Losses
 
Estimated Fair
 Value
U.S. government treasuries and agencies securities
$
73,974

 
$
10

 
$
(509
)
 
$
73,475

Money market funds
61,920

 
—

 
—

 
61,920

Asset-backed securities
14,526

 
9

 
(19
)
 
14,516

Corporate bonds
107,764

 
71

 
(226
)
 
107,609

International government bonds
5,424

 
4

 
(13
)
 
5,415

Bank deposits
12,646

 
—

 
—

 
12,646

Repurchase agreements
38

 
—

 
—

 
38

Total available-for-sale investments
276,292

 
94

 
(767
)
 
275,619

Less amounts classified as cash equivalents
(61,958
)
 
—

 
—

 
(61,958
)
Short-term investments
$
214,334

 
$
94

 
$
(767
)
 
$
213,661


The amortized cost and fair value of available-for-sale investments as of April 2, 2017 were as follows:
 
(in thousands)
Cost
 
Gross
Unrealized
 Gains
 
Gross
Unrealized
 Losses
 
Estimated Fair
 Value
U.S. government treasuries and agencies securities
$
62,048

 
$
16

 
$
(508
)
 
$
61,556

Money market funds
140,425

 
—

 
—

 
140,425

Asset-backed securities
13,865

 
5

 
(23
)
 
13,847

Corporate bonds
96,660

 
42

 
(326
)
 
96,376

International government bonds
5,423

 
2

 
(15
)
 
5,410

Corporate commercial paper
4,898

 
—

 
—

 
4,898

Bank deposits
12,305

 
—

 
—

 
12,305

Repurchase agreements
173

 
—

 
—

 
173

Total available-for-sale investments
335,797

 
65

 
(872
)
 
334,990

Less amounts classified as cash equivalents
(143,498
)
 
—

 
—

 
(143,498
)
Short-term investments
$
192,299

 
$
65

 
$
(872
)
 
$
191,492
Contractual maturity of available-for-sale debt securities
The cost and estimated fair value of available-for-sale securities as of July 2, 2017, by contractual maturity, were as follows:
(in thousands)
Amortized
Cost
 
Estimated Fair
Value
Due in 1 year or less
$
106,516

 
$
106,505

Due in 1-2 years
59,650

 
59,527

Due in 2-5 years
110,126

 
109,587

Total investments in available-for-sale securities
$
276,292

 
$
275,619
Gross unrealized losses and fair value of investments in continuous loss position
The following table shows the gross unrealized losses and fair value of the Company’s investments with unrealized losses as of July 2, 2017, 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
$
58,957

 
$
(226
)
 
$
—

 
$
—

 
$
58,957

 
$
(226
)
Asset-backed securities
8,958

 
(19
)
 
—

 
—

 
8,958

 
(19
)
U.S. government treasuries and agencies securities
68,311

 
(509
)
 
—

 
—

 
68,311

 
(509
)
International government bonds
2,637

 
(13
)
 
—

 
—

 
2,637

 
(13
)
Total
$
138,863

 
$
(767
)
 
$
—

 
$
—

 
$
138,863

 
$
(767
)

The following table shows the gross unrealized losses and fair value of the Company’s investments with unrealized losses, as of April 2, 2017, 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
$
71,308

 
$
(326
)
 
$
—

 
$
—

 
$
71,308

 
$
(326
)
Asset-backed securities
11,294

 
(23
)
 
—

 
—

 
11,294

 
(23
)
U.S. government treasuries and agencies securities
55,497

 
(508
)
 
—

 
—

 
55,497

 
(508
)
International government bonds
2,634

 
(15
)
 
—

 
—

 
2,634

 
(15
)
Total
$
140,733

 
$
(872
)
 
$
—

 
$
—

 
$
140,733

 
$
(872
)