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Restructuring and Other Charges - Segments (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2016
Restructuring and Other Charges    
Severance Costs $ 2,268 $ 9,269
Contract Operations    
Restructuring and Other Charges    
Severance Costs 675 2,916
Aftermarket Services    
Restructuring and Other Charges    
Severance Costs 432 801
Other    
Restructuring and Other Charges    
Severance Costs $ 1,161 $ 5,552