v2.4.0.8
Summary of Significant Accounting Policies (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Aircraft
Dec. 31, 2012
Summary of Significant Accounting Policies [Abstract]    
Short-term money market funds   $ 625,000
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]    
Estimated useful economic life of the STC (in years) 5 years  
Amortization method used for intangible assets straight-line method  
Future amortization expense for customer lists and other customer relationships [Abstract]    
2014 4,363,000  
2015 4,361,000  
2016 4,099,000  
2017 4,048,000  
2018 4,048,000  
Indefinite-lived intangible assets 24,500,000  
Long-lived assets held for sale [Abstract]    
Number of aircraft classified as current assets held for sale 6  
Goodwill [Line Items]    
Goodwill 128,121,000 120,029,000
Air Medical Services
   
Goodwill [Line Items]    
Goodwill 117,466,000  
United Rotorcraft
   
Goodwill [Line Items]    
Goodwill 495,000  
Tourism
   
Goodwill [Line Items]    
Goodwill $ 10,160,000  
Minimum
   
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]    
Estimated useful economic life of the STC (in years) 5 years  
Maximum
   
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]    
Estimated useful economic life of the STC (in years) 16 years  
Buildings, including hangars
   
Property, Plant and Equipment [Line Items]    
Useful life (in years) 40 years  
Estimated residual value (in hundredths) 10.00%  
Helicopters, including medical equipment | Minimum
   
Property, Plant and Equipment [Line Items]    
Useful life (in years) 8 years  
Estimated residual value (in hundredths) 10.00%  
Helicopters, including medical equipment | Maximum
   
Property, Plant and Equipment [Line Items]    
Useful life (in years) 25 years  
Estimated residual value (in hundredths) 25.00%  
Ground support equipment and rotables | Minimum
   
Property, Plant and Equipment [Line Items]    
Useful life (in years) 5 years  
Estimated residual value (in hundredths) 0.00%  
Ground support equipment and rotables | Maximum
   
Property, Plant and Equipment [Line Items]    
Useful life (in years) 10 years  
Estimated residual value (in hundredths) 10.00%  
Furniture and office equipment
   
Property, Plant and Equipment [Line Items]    
Estimated residual value (in hundredths) 0.00%  
Furniture and office equipment | Minimum
   
Property, Plant and Equipment [Line Items]    
Useful life (in years) 3 years  
Furniture and office equipment | Maximum
   
Property, Plant and Equipment [Line Items]    
Useful life (in years) 10 years