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Investments (Tables)
12 Months Ended
Dec. 31, 2015
Investments Debt And Equity Securities [Abstract]  
Schedule of Fair Value of Available-for-Sale Investments by Type of Security

As of December 31, 2015, the fair value of available-for-sale investments by type of security was as follows:

 

 

 

December 31, 2015

 

 

 

Amortized

Cost

 

 

Gross

Unrealized Gain

 

 

Gross

Unrealized Loss

 

 

Fair

Value

 

Investments:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Commercial Paper

 

$

64,733

 

 

$

87

 

 

$

 

 

$

64,820

 

Corporate Bonds

 

 

46,538

 

 

 

 

 

 

(48

)

 

 

46,490

 

Government Securities

 

 

15,823

 

 

 

 

 

 

(4

)

 

 

15,819

 

Treasury Bonds

 

 

4,022

 

 

 

 

 

 

(2

)

 

 

4,020

 

 

 

$

131,116

 

 

$

87

 

 

$

(54

)

 

$

131,149