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Restructuring and Other Charges - Segments (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2016
Restructuring and Other Charges    
Restructuring charges $ 4,030 $ 13,299
Other    
Restructuring and Other Charges    
Restructuring charges 3,210 8,762
Contract Operations | Operating segments    
Restructuring and Other Charges    
Restructuring charges 508 3,424
Aftermarket Services | Operating segments    
Restructuring and Other Charges    
Restructuring charges $ 312 $ 1,113