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Summary of Significant Accounting Policies (Details) (USD $)
Sep. 30, 2014
Dec. 31, 2013
Retained earnings (Revised) $ 4,481,606,000 $ 4,304,664,000
Adjustment of opening balance | Revision of CTA
   
Retained earnings (Revised) 91,500,000  
Accumulated Other Comprehensive Income $ 91,500,000