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Investments (Tables)
 3 Months Ended
Sep. 27, 2015
Investments, Debt and Equity Securities [Abstract]  
Summary of Short-term Investments by Type
The following tables summarize short-term investments (in thousands):
 
 
September 27, 2015
 
 
Amortized    
Cost
 
Gross Unrealized    
Gains
 
Gross
Unrealized    
Losses
 
Estimated Fair 
Value
Municipal bonds
 

$192,470

 

$1,650

 

($91
)
 

$194,029

Corporate bonds
 
158,116

 
1,174

 
(130
)
 
159,160

Non-U.S. certificates of deposit
 
195,524

 
—

 
—

 
195,524

Total short-term investments
 

$546,110

 

$2,824

 

($221
)
 

$548,713

 
 
 
 
 
 
 
 
 
 
 
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

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

 
—

 
—

 
225,206

Total short-term investments
 

$572,160

 

$1,820

 

($499
)
 

$573,481
Summary of Gross Unrealized Losses and Estimated Fair Value of Short-term Investments, Aggregated by Investment Type and Length of Time
The following tables present 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):
 
 
September 27, 2015
 
 
Less than 12 Months
 
Greater than 12 Months
 
Total
 
 
Fair Value
 
Unrealized Loss
 
Fair Value
 
Unrealized Loss
 
Fair Value
 
Unrealized Loss
Municipal bonds
 

$25,072

 

($91
)
 

$—

 

$—

 

$25,072

 

($91
)
Corporate bonds
 
47,248

 
(117
)
 
1,795

 
(13
)
 
49,043

 
(130
)
Total
 

$72,320

 

($208
)
 

$1,795

 

($13
)
 

$74,115

 

($221
)
Number of securities with an unrealized loss
 
 
 
36

 
 
 
1

 
 
 
37

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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 as of September 27, 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

$12,772

 

$146,232

 

$35,025

 

$—

 

$194,029

Corporate bonds
33,732

 
92,471

 
32,957

 
—

 
159,160

Non-U.S. certificates of deposit
195,524

 
—

 
—

 
—

 
195,524

Total short-term investments

$242,028

 

$238,703

 

$67,982

 

$—

 

$548,713