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Fair Value of Financial Instruments (Tables)
9 Months Ended
Sep. 30, 2016
Fair Value of Financial Instruments [Abstract]  
Available-for-sale Securities

The following is a summary of available-for-sale securities:

 

 

 

 

 



 

 



September 30,

 

December 31,



2016

 

2015

Amortized cost

$

455,097 

 

$

1,040,850 

Gross unrealized gains (losses)

 

583 

 

 

(2,712)

Fair market value

$

455,680 

 

$

1,038,138 



Unrealized Gains (Losses) on Investments held in Rabbi Trust



 

 

 

 

 

 

 

 

 

 

 



 

 

 

 

 

 

 

 



Three months ended September 30,

 

Nine months ended September 30,



2016

 

2015

 

2016

 

2015

Unrealized gains (losses) on investments held in rabbi trust

$

391 

 

$

(1,000)

 

$

677 

 

$

(744)