Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2015

Commitments and Contingencies Disclosure [Abstract]

Schedules of Concentration of Risk, by Risk Factor

As of June 30, 2015, the flight crewmember employees of ABX and ATI were represented by the labor unions listed below:

Airline	Labor Agreement Unit	Percentage of the Company’s Employees
ABX	International Brotherhood of Teamsters	11.4%
ATI	Air Line Pilots Association	5.8%