Consolidated Segment Data (Tables)
3 Months Ended
Mar. 31, 2014
Consolidated Segment Data [Abstract]  
Summary of selected information in segment structure presented in following tables

   
Three Months Ended
 
   
2014
   
2013
 
   
Petrochemical
   
Rubber
   
Total
   
Petrochemical
   
Rubber
   
Total
 
   
($'000)
   
($'000)
   
($'000)
   
($'000)
   
($'000)
   
($'000)
 
   
(Unaudited)
   
(Unaudited)
   
(Unaudited)
   
(Unaudited)
   
(Unaudited)
   
(Unaudited)
 
Revenue
  $ 195,678     $ 6,216     $ 201,894     $ 181,593     $ 27,961     $ 209,554  
Income (loss) from operations
  $ 4,174     $ (831 )   $ 3,343     $ (337 )   $ 6,022     $ 5,685  
Total assets
  $ 874,280     $ 97,942     $ 972,222     $ 675,823     $ 93,253     $ 769,076