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Restructuring Charges (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Restructuring Cost and Reserve [Line Items]        
Restructuring charges $ 0 $ 0 $ 0 $ 39
Restructuring Reserve [Roll Forward]        
Restructuring charges $ 0 $ 0 $ 0 $ 39