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CASH, CASH EQUIVALENTS AND INVESTMENTS (Tables)
 6 Months Ended
Jun. 30, 2016
Cash And Cash Equivalents [Abstract]  
Schedule of Cash, Cash Equivalents and Investments

Investments as of June 30, 2016 and December 31, 2015 consisted of the following (in thousands):

 

 

 

Amortized

 

 

Unrealized

 

 

Aggregate Fair

 

Investment Classification

 

Cost

 

 

Gains

 

 

(Losses)

 

 

Market Value

 

June 30, 2016

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Certificates of deposit

 

$

10,626

 

 

$

9

 

 

$

(2

)

 

$

10,633

 

Corporate bonds

 

 

234,222

 

 

 

12

 

 

 

(53

)

 

 

234,181

 

U.S. Government bonds

 

 

17,498

 

 

 

—

 

 

 

(262

)

 

 

17,236

 

 

 

$

262,346

 

 

$

21

 

 

$

(317

)

 

$

262,050

 

December 31, 2015

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Certificates of deposit

 

$

11,532

 

 

$

3

 

 

$

(14

)

 

$

11,521

 

Corporate bonds

 

 

233,848

 

 

 

—

 

 

 

(139

)

 

 

233,709

 

U.S. Government bonds

 

 

54,953

 

 

 

1

 

 

 

(16

)

 

 

54,938

 

 

 

$

300,333

 

 

$

4

 

 

$

(169

)

 

$

300,168