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CASH, CASH EQUIVALENTS AND INVESTMENTS
 6 Months Ended
Jun. 30, 2018
Cash And Cash Equivalents [Abstract]  
CASH, CASH EQUIVALENTS AND INVESTMENTS

3.

CASH, CASH EQUIVALENTS AND INVESTMENTS:

The Company considers all highly liquid debt instruments purchased with an original maturity of three months or less to be cash equivalents. The Company classifies its remaining investments as available-for-sale. These securities are carried at fair market value, with unrealized gains and losses reported in shareholders’ equity. Gains or losses on securities sold are based on the specific identification method. Investments as of June 30, 2018 and December 31, 2017 consisted of the following (in thousands):

 

 

 

Amortized

 

 

Unrealized

 

 

Aggregate Fair

 

Investment Classification

 

Cost

 

 

Gains

 

 

(Losses)

 

 

Market Value

 

June 30, 2018

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Certificates of deposit

 

$

1,250

 

 

$

—

 

 

$

(1

)

 

$

1,249

 

Corporate bonds

 

 

204,396

 

 

 

2

 

 

 

(63

)

 

 

204,335

 

U.S. Government securities

 

 

173,093

 

 

 

—

 

 

 

(110

)

 

 

172,983

 

 

 

$

378,739

 

 

$

2

 

 

$

(174

)

 

$

378,567

 

December 31, 2017

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Certificates of deposit

 

$

1,296

 

 

$

1

 

 

$

(1

)

 

$

1,296

 

Corporate bonds

 

 

104,626

 

 

 

—

 

 

 

(252

)

 

 

104,374

 

U.S. Government securities

 

 

214,641

 

 

 

—

 

 

 

(139

)

 

 

214,502

 

 

 

$

320,563

 

 

$

1

 

 

$

(392

)

 

$

320,172

 

As of June 30, 2018 and December 31, 2017, there was $24.9 million of government securities and $17.9 million of corporate bonds included in cash equivalents in the consolidated balance sheet, respectively.