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Statement of Changes in Shareholders' Deficit (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Statement of Changes in Shareholders' Deficit [Abstract]      
Shareholders’ deficit - opening balance $ (16,919) $ (8,199) $ (11,435)
Net (loss) / gain from operations (54,148) 481 (2,907)
Adjustment of redeembable Shares to redemption value 70,513 (9,201) 6,143
Shareholders’ deficit - closing balance $ (554) $ (16,919) $ (8,199)