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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 $ (368,762) $ (301,078) $ (186,817)
Net loss for the period (131,104) 14,523 10,873
Adjustment of redeemable Shares to redemption value 499,866 (82,207) (125,134)
Shareholders’ deficit - closing balance $ 0 $ (368,762) $ (301,078)