v3.3.1.900
Commitments and Contingencies - Additional Information (Detail)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
USD ($)
Aircraft
Land_Parcel
Dec. 31, 2014
USD ($)
Aircraft
Dec. 31, 2013
USD ($)
Long-term Purchase Commitment [Line Items]      
Aircraft and real estate rental expense $ 53,718 $ 52,698 $ 49,460
Aggregate amount of guarantees and bonds $ 1,100    
Number of aircrafts delivered | Aircraft 1    
Total aircraft deposits $ 3,568 8,305  
Aggregate estimated probable liability environmental matters $ 200    
Number of parcels of land exists | Land_Parcel 2    
Affiliated Entity [Member]      
Long-term Purchase Commitment [Line Items]      
Aircraft and real estate rental expense $ 0 $ 500 $ 600
2016 [Member]      
Long-term Purchase Commitment [Line Items]      
Aggregate purchase price for aircraft 67,800    
2017 [Member]      
Long-term Purchase Commitment [Line Items]      
Aggregate purchase price for aircraft 55,700    
2018 [Member]      
Long-term Purchase Commitment [Line Items]      
Aggregate purchase price for aircraft 127,000    
2019 [Member]      
Long-term Purchase Commitment [Line Items]      
Aggregate purchase price for aircraft 150,400    
2020 [Member]      
Long-term Purchase Commitment [Line Items]      
Aggregate purchase price for aircraft 22,700    
Heavy Aircraft [Member]      
Long-term Purchase Commitment [Line Items]      
Aggregate purchase price for aircraft $ 17,700    
Number of aircraft purchased | Aircraft 1    
Option to purchase additional number of aircrafts | Aircraft   6  
Number of aircraft orders cancelled previously scheduled for delivery | Aircraft 4