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Investment in Global (Tables)
9 Months Ended
Sep. 30, 2014
Investments, Debt and Equity Securities [Abstract]  
Market Value of Investment in Global

   September 30, 2014  December 31, 2013
           
Shares of Global Stock Held by HKN   12,805    12,462 
           
Closing Price of Global Stock  £0.46   £0.94 
           
Foreign Currency Exchange Rate   1.6220    1.6574 
           
Market Value of Investment in Global  $9,450   $19,312 

  

Gross Unrealized Losses on Investments in Unrealized Loss Position

   September 30, 2014
   Less Than 12 Months  12 Months or Greater  Total
   Fair Value  Unrealized Loss  Fair Value  Unrealized Loss  Fair Value  Unrealized Loss
Available for sale securities:                              
Investment in Global  $9,450   $(1,463)  $—     $—     $9,450   $(1,463)
Total  $9,450   $(1,463)  $—     $—     $9,450   $(1,463)