Quarterly report pursuant to Section 13 or 15(d)

COMMITMENTS AND CONTINGENCIES (Details)

v3.8.0.1
COMMITMENTS AND CONTINGENCIES (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2018
USD ($)
helicopter
Dec. 31, 2017
USD ($)
Loss Contingencies [Line Items]    
Number of helicopter purchase agreements cancelled | helicopter 2  
Penalties on cancellation $ 500  
Unfunded capital commitments 87,100  
Unfunded capital commitments payable 11,500  
Deposits paid 1,300  
Commitments eligible for termination 88,400  
Liquidated damages 2,200  
Other current assets   $ 3,250
Contingent Fees Sought by Former Tax Consultant | Pending Litigation    
Loss Contingencies [Line Items]    
Taxes, penalties and interest 600  
Employment-Related Litigation Matters | Pending Litigation    
Loss Contingencies [Line Items]    
Taxes, penalties and interest 200  
Unfavorable Regulatory Action | Brazilian Customs Authorities Claims | Pending Litigation    
Loss Contingencies [Line Items]    
Taxes, penalties and interest 1,100  
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 3,000  
Foreign Tax Authority | Foreign Tax Authority | Aeroleo | Other Litigation Matters    
Loss Contingencies [Line Items]    
Other current assets 9,800  
Foreign Tax Authority | State of Rio de Janeiro | Aeroleo    
Loss Contingencies [Line Items]    
Taxes, penalties and interest 500  
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 3  
Number of additional helicopters | helicopter 10  
AW169 Light Twin Helicopters    
Loss Contingencies [Line Items]    
Number of helicopters | helicopter 5