Commitments and Contingencies - Schedule of Future Aircraft Operating Leases (Details)	Dec. 31, 2013 aircraft
Operating Leased Assets [Line Items]
2014	11
2015	14
2016	17
2017	20
2018	11
2019	13
2020	13
2021	18
Total future aircraft to be received	117
Airbus 320 | Airbus
Operating Leased Assets [Line Items]
2014	11
2015	11
2016	5
2017	10
Total future aircraft to be received	37
Airbus A320 NEO | Airbus
Operating Leased Assets [Line Items]
2018	6
2019	8
2020	13
2021	18
Total future aircraft to be received	45
Airbus A320 NEO | Third-Party Lessor
Operating Leased Assets [Line Items]
2015	1
2016	4
Total future aircraft to be received	5
Airbus A321 | Airbus
Operating Leased Assets [Line Items]
2015	2
2016	8
2017	10
2018	5
Total future aircraft to be received	25
Airbus A321 NEO | Airbus
Operating Leased Assets [Line Items]
2019	5
Total future aircraft to be received	5