Quarterly report pursuant to Section 13 or 15(d)

COMMITMENTS AND CONTINGENCIES (Details)

v3.7.0.1
COMMITMENTS AND CONTINGENCIES (Details)
 3 Months Ended
Mar. 31, 2017
USD ($)
helicopter
Mar. 31, 2016
USD ($)
Dec. 31, 2016
USD ($)
Loss Contingencies [Line Items]      
Unfunded capital commitments $ 117,000,000    
Unfunded capital commitments payable 16,200,000    
Deposits paid 1,300,000    
Commitments eligible for termination 103,500,000    
Liquidated damages 2,500,000    
Other current assets 3,779,000   $ 3,777,000
Utilized credits $ 0 $ 1,200,000  
AW189 Heavy Helicopters      
Loss Contingencies [Line Items]      
Number of helicopters | helicopter 5    
Number of additional helicopters | helicopter 10    
S92 Heavy Helicopters      
Loss Contingencies [Line Items]      
Number of helicopters | helicopter 2    
AW169 Light Twin Helicopters      
Loss Contingencies [Line Items]      
Number of helicopters | helicopter 5    
Foreign Tax Authority | Aeroleo      
Loss Contingencies [Line Items]      
Taxes, penalties and interest $ 200,000 $ 2,000,000  
Foreign Tax Authority | Aeroleo | Brazilian Tax Dispute with Respect to Certain Tax Credits      
Loss Contingencies [Line Items]      
Taxes, penalties and interest 2,400,000    
Foreign Tax Authority | Municipal Tax Authorities of Rio de Janeiro and Macae | Aeroleo      
Loss Contingencies [Line Items]      
Taxes, penalties and interest 7,400,000    
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 2,900,000    
Foreign Tax Authority | Foreign Tax Authority | Aeroleo | Other Litigation Matters      
Loss Contingencies [Line Items]      
Other current assets 8,900,000    
Foreign Tax Authority | State of Rio de Janeiro | Aeroleo      
Loss Contingencies [Line Items]      
Taxes, penalties and interest 400,000    
Installment payments 200,000    
Damages dismissed 1,600,000    
Pending Litigation | Contingent Fees Sought by Former Tax Consultant      
Loss Contingencies [Line Items]      
Taxes, penalties and interest 500,000    
Pending Litigation | Employment-Related Litigation Matters      
Loss Contingencies [Line Items]      
Taxes, penalties and interest 100,000    
Pending Litigation | Brazil Taxing Authorities | Tax Disputes over Tax Credits Applied to Offset Social Tax Liability      
Loss Contingencies [Line Items]      
Taxes, penalties and interest 300,000    
Unfavorable Regulatory Action | Pending Litigation | Brazilian Customs Authorities Claims      
Loss Contingencies [Line Items]      
Taxes, penalties and interest $ 900,000