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           Consolidated Statements of Cash Flows (Parenthetical) (7% Exchangeable Senior Subordinated Notes due 2014 [Member]) 
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           Sep. 30, 2014 
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           Dec. 31, 2013 
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           Sep. 30, 2013 
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           7% Exchangeable Senior Subordinated Notes due 2014 [Member] 
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| Interest rate on instrument | 7.00% | [1],[2] | 7.00% | [1],[2] | 7.00% | ||||
          
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