Summary of Bank Borrowings and Capital Lease Obligations Additional Information (Details)	6 Months Ended
	Jun. 30, 2013	Jun. 30, 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