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Summary of Bank Borrowings and Capital Lease Obligations Additional Information (Details)
 9 Months Ended 12 Months Ended
Sep. 30, 2013
Dec. 31, 2012
Bank Borrowings And Capital Lease Obligations [Abstract]    
Capital Lease Minimum Interest Rate 5.30% 5.30%
Capital Lease Maximum Interest Rate 73.30% 73.30%
Capital Lease Latest Maturity Date 2016 2016