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Marketable Securities (Tables)
9 Months Ended
Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]  
Schedule of Available-for-sale Securities
The following tables show the Company’s available-for-sale securities’ adjusted cost, gross unrealized gains, gross unrealized losses and fair value by significant investment category as of September 30, 2017 and December 31, 2016, respectively:
 
 
As of September 30, 2017
Marketable Securities:
 
Adjusted Cost
 
Unrealized Gains
 
Unrealized Losses
 
Fair Value
 
 
 
 
 
 
 
 
 
Equity securities
 
$
438

 
$
26

 
$
(10
)
 
$
454

Money market funds
 
44,311

 
1

 

 
44,312

Corporate bonds
 
19,014

 
84

 
(112
)
 
18,986

Government securities - U.S.
 
11,220

 
21

 
(108
)
 
11,133

Government securities - Non-U.S.
 
70

 

 
(1
)
 
69

Other fixed-income securities
 
3,212

 

 
(5
)
 
3,207

Total
 
$
78,265

 
$
132

 
$
(236
)
 
$
78,161

 
 
As of December 31, 2016
Marketable Securities:
 
Adjusted Cost
 
Unrealized Gains
 
Unrealized Losses
 
Fair Value
 
 
 
 
 
 
 
 
 
Equity securities
 
$
3,689

 
$
409

 
$
(65
)
 
$
4,033

Corporate bonds
 
57,871

 
89

 
(612
)
 
57,348

Government securities - U.S.
 
43,049

 
515

 
(750
)
 
42,814

Government securities - Non-U.S.
 
247

 

 
(14
)
 
233

Other fixed-income securities
 
10,281

 
221

 
(31
)
 
10,471

Other securities
 
81

 

 

 
81

Total
 
$
115,218


$
1,234


$
(1,472
)

$
114,980

 
Schedule of Contractual Maturity Dates
The following table summarizes the estimated fair value of our investments in marketable debt securities, accounted for as available-for-sale securities and classified by the contractual maturity date of the securities as of September 30, 2017:
 
 
Maturities
Marketable Debt Securities:
 
Less than 1 Year
 
1-5 Years
 
5-10 Years
 
Greater than 10 Years
 
Total
 
 
 
 
 
 
 
 
 
 
 
Corporate bonds
 
1,361

 
16,219

 
1,136

 
270

 
18,986

Government securities - U.S.
 
172

 
8,547

 
348

 
2,066

 
11,133

Government securities - Non-U.S.
 

 

 
69

 

 
69

Other fixed-income securities
 

 
2,473

 
734

 

 
3,207

Total
 
$
1,533

 
$
27,239

 
$
2,287

 
$
2,336

 
$
33,395