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Noncontrolling Interests (Details)
3 Months Ended
Mar. 31, 2017
Robtec [Member]  
Business Acquisition [Line Items]  
Acquired ownership percentage 70.00%
Acquisition date Nov. 25, 2014
Easyway [Member]  
Business Acquisition [Line Items]  
Acquired ownership percentage 65.00%
Acquisition date Apr. 02, 2016