Commitments and Contingencies - Devaluation and Other Contingencies (Details) employee in Thousands	Feb. 28, 2016 USD ($) seat	Mar. 31, 2016 employee
Other Commitments
Entity number of employees | employee		84
Percentage of employees represented by unions under collective bargaining agreements		18.00%
Shuttle America
Other Commitments
Line of credit loan commitment | $	$ 75,000,000
Embraer 170/175
Other Commitments
Number of seats in plane | seat	50