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Business Combinations Wuxi Acquisition (Details)
$ in Thousands, ¥ in Millions
Sep. 30, 2015
USD ($)
Dec. 31, 2014
USD ($)
May. 27, 2014
CNY (¥)
May. 27, 2014
USD ($)
Business Acquisition [Line Items]        
Goodwill | $ $ 414,121 $ 405,522    
Wuxi [Member]        
Business Acquisition [Line Items]        
Business Acquisition, Percentage of Voting Interests Acquired     100.00% 100.00%
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net     ¥ 73.3 $ 11,943
Business Acquisition, Fair Value Of Net Assets Acquired Excluding Goodwill     15.6  
Goodwill     ¥ 57.7