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Investment in Affiliate (Tables)
 9 Months Ended
Sep. 30, 2015
Investment in Affiliate [Abstract]  
Schedule of Changes in Investment in Affiliate

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  

As of September 30,

 

As of December 31,

 

  

2015

  

2014

 

  

(in thousands)

Investment at beginning of year

  

$
164,700 

  

$
485,401 

Equity in earnings

  

 

 —

  

 
34,949 

Impairment

  

 

 —

  

 
(355,650)

Investment at end of period

  

$
164,700 

  

$
164,700