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Investments (Tables)
 12 Months Ended
Jun. 28, 2015
Investments, Debt and Equity Securities [Abstract]  
Summary of Short-term Investments by Type
The following table summarizes short-term investments (in thousands): 
 
June 29, 2014
 
Amortized
Cost
 
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses
 
Estimated
Fair Value
Municipal bonds

$291,869

 

$2,323

 

($12
)
 

$294,180

Corporate bonds
200,177

 
2,283

 
(114
)
 
202,346

U.S. agency securities
18,994

 
141

 
—

 
19,135

Non-U.S. certificates of deposit
352,928

 
—

 
—

 
352,928

Non-U.S. government securities
7,025

 
28

 
—

 
7,053

Total short-term investments

$870,993

 

$4,775

 

($126
)
 

$875,642

The following table summarizes short-term investments (in thousands):
 
June 28, 2015
 
Amortized
Cost
 
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses
 
Estimated
Fair Value
Municipal bonds

$194,123

 

$988

 

($341
)
 

$194,770

Corporate bonds
152,831

 
832

 
(158
)
 
153,505

U.S. agency securities
—

 
—

 
—

 
—

Non-U.S. certificates of deposit
225,206

 
—

 
—

 
225,206

Non-U.S. government securities
—

 
—

 
—

 
—

Total short-term investments

$572,160

 

$1,820

 

($499
)
 

$573,481
Summary of Gross Unrealized Losses and Fair Value of Short-term Investments by Type and Length of Time
The following table presents the gross unrealized losses and estimated fair value of the Company’s short-term investments, aggregated by investment type and the length of time that individual securities have been in a continuous unrealized loss position (in thousands, except numbers of securities):
 
June 29, 2014
 
Less than 12 Months
 
Greater than 12 Months
 
Total
 
Fair Value
 
Unrealized
Loss
 
Fair Value
 
Unrealized
Loss
 
Fair Value
 
Unrealized
Loss
Municipal bonds

$7,906

 

($8
)
 

$1,520

 

($4
)
 

$9,426

 

($12
)
Corporate bonds
15,696

 
(31
)
 
13,049

 
(83
)
 
28,745

 
(114
)
Total

$23,602

 

($39
)
 

$14,569

 

($87
)
 

$38,171

 

($126
)
Number of securities with an unrealized loss
 
 
13

 
 
 
7

 
 
 
20

The following table presents the gross unrealized losses and estimated fair value of the Company’s short-term investments, aggregated by investment type and the length of time that individual securities have been in a continuous unrealized loss position (in thousands, except numbers of securities): 
 
June 28, 2015
 
Less than 12 Months
 
Greater than 12 Months
 
Total
 
Fair Value
 
Unrealized
Loss
 
Fair Value
 
Unrealized
Loss
 
Fair Value
 
Unrealized
Loss
Municipal bonds

$53,204

 

($341
)
 

$—

 

$—

 

$53,204

 

($341
)
Corporate bonds
46,636

 
(143
)
 
1,812

 
(15
)
 
48,448

 
(158
)
Total

$99,840

 

($484
)
 

$1,812

 

($15
)
 

$101,652

 

($499
)
Number of securities with an unrealized loss
 
 
54

 
 
 
1

 
 
 
55
Contractual Maturities of Short-term Investments by Type
The contractual maturities of short-term investments at June 28, 2015 were as follows (in thousands): 
 
Within One
Year
 
After One,
Within Five
Years
 
After Five,
Within Ten
Years
 
After Ten
Years
 
Total
Municipal bonds

$12,575

 

$147,470

 

$34,725

 

$—

 

$194,770

Corporate bonds
28,422

 
94,582

 
30,501

 
—

 
153,505

Non-U.S. certificates of deposit
225,206

 
—

 
—

 
—

 
225,206

Total short-term investments

$266,203

 

$242,052

 

$65,226

 

$—

 

$573,481