Variable Interest Entities (Details)
$ in Millions
3 Months Ended 12 Months Ended
Sep. 30, 2014
Dec. 31, 2015
USD ($)
VIE
Dec. 31, 2014
USD ($)
Primary Beneficiary      
Variable Interest Entity [Line Items]      
Number of variable interest entities | VIE   2  
EuAC      
Variable Interest Entity [Line Items]      
Variable interest entity, ownership interest percentage   49.00%  
VIE assets   $ 3.1  
VIE liabilities     $ 1.3
EuAC | Grupo Inaer      
Variable Interest Entity [Line Items]      
Ownership interest percentage by noncontrolling owners   49.00%  
EuAC | Fiduciaria Centro Nord (FCN)      
Variable Interest Entity [Line Items]      
Ownership interest percentage by noncontrolling owners   2.00%  
Costa Do Sol      
Variable Interest Entity [Line Items]      
VIE assets   $ 4.2  
VIE liabilities     $ 2.1
Costa Do Sol | Preferred Non-voting Stock      
Variable Interest Entity [Line Items]      
Variable interest entity, ownership interest percentage 100.00%    
Costa Do Sol | Common Voting Stock      
Variable Interest Entity [Line Items]      
Variable interest entity, ownership interest percentage 20.00%    
Costa Do Sol | Common Voting Stock | Air Amozonia Employee      
Variable Interest Entity [Line Items]      
Variable interest entity, ownership interest percentage 80.00%