v2.4.0.8
Employee Benefit Plans (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Defined Contribution Plans [Line Items]      
Employee contribution rate, maximum (in hundredths) 60.00%    
Employee contribution, IRS maximum $ 17,500    
Employee contribution, IRS maximum, age 50 or older 23,000    
Employer discretionary match based on employee contributions (in hundredths) 70.00%    
Employer discretionary match based on gross pay (in hundredths) 8.00%    
Employer contributions $ 10,793,000 $ 9,372,000 $ 7,033,000
OF Air Holdings Corporation
     
Defined Contribution Plans [Line Items]      
Employee contribution rate, maximum (in hundredths) 50.00%    
Employer discretionary match based on employee contributions (in hundredths) 25.00%    
Employer discretionary match based on gross pay (in hundredths) 2.00%