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Restructuring and Other Charges - Segment (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2017
USD ($)
Restructuring and Other Charges  
Severance Costs $ 7,001
Contract Operations  
Restructuring and Other Charges  
Severance Costs 2,241
Aftermarket Services  
Restructuring and Other Charges  
Severance Costs 369
Corporate  
Restructuring and Other Charges  
Severance Costs $ 4,391