Quarterly report pursuant to Section 13 or 15(d)

COMMITMENTS AND CONTINGENCIES (Details)

v3.7.0.1
COMMITMENTS AND CONTINGENCIES (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2017
USD ($)
helicopter
Jun. 30, 2017
USD ($)
helicopter
Jun. 30, 2016
USD ($)
Dec. 31, 2016
USD ($)
Loss Contingencies [Line Items]        
Unfunded capital commitments $ 114,800 $ 114,800    
Unfunded capital commitments payable 7,200 7,200    
Deposits paid 1,300 1,300    
Commitments eligible for termination 110,600 110,600    
Liquidated damages 2,600 2,600    
Other current assets 0 0   $ 3,777
Utilized credits     $ 1,700  
Contingent Fees Sought by Former Tax Consultant | Pending Litigation        
Loss Contingencies [Line Items]        
Taxes, penalties and interest   500    
Employment-Related Litigation Matters | Pending Litigation        
Loss Contingencies [Line Items]        
Taxes, penalties and interest   100    
Unfavorable Regulatory Action | Brazilian Customs Authorities Claims | Pending Litigation        
Loss Contingencies [Line Items]        
Taxes, penalties and interest   900    
Foreign Tax Authority | Aeroleo | Brazilian Tax Dispute with Respect to Certain Tax Credits        
Loss Contingencies [Line Items]        
Taxes, penalties and interest   2,300    
Foreign Tax Authority | Municipal Tax Authorities of Rio de Janeiro and Macae | Aeroleo        
Loss Contingencies [Line Items]        
Taxes, penalties and interest   7,200    
Foreign Tax Authority | Foreign Tax Authority | Aeroleo | Brazilian Tax Dispute with Respect to Employer Social Security Contributions        
Loss Contingencies [Line Items]        
Taxes, penalties and interest   2,900    
Foreign Tax Authority | Foreign Tax Authority | Aeroleo | Other Litigation Matters        
Loss Contingencies [Line Items]        
Other current assets 9,300 9,300    
Foreign Tax Authority | State of Rio de Janeiro | Aeroleo        
Loss Contingencies [Line Items]        
Taxes, penalties and interest $ 400      
Installment payments   (200)    
Damages dismissed   1,600    
Brazil Taxing Authorities | Tax Disputes over Tax Credits Applied to Offset Social Tax Liability | Pending Litigation        
Loss Contingencies [Line Items]        
Taxes, penalties and interest   $ 300    
AW189 Heavy Helicopters        
Loss Contingencies [Line Items]        
Number of helicopters | helicopter 5 5    
Number of additional helicopters | helicopter 10 10    
S92 Heavy Helicopters        
Loss Contingencies [Line Items]        
Number of helicopters | helicopter 1 1    
AW169 Light Twin Helicopters        
Loss Contingencies [Line Items]        
Number of helicopters | helicopter 5 5