Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2016

Commitments and Contingencies Disclosure [Abstract]

Schedules of Concentration of Risk, by Risk Factor

As of June 30, 2016, 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	8.9%
ATI	Air Line Pilots Association	6.6%