v3.5.0.2

Commitments and Contingencies - Additional Information (Detail) $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2016 USD ($) Aircraft Land_Parcel | Dec. 31, 2015 Aircraft | Dec. 31, 2014 Aircraft
Long-term Purchase Commitment [Line Items] |  |  |
Number of aircrafts delivered | Aircraft |  | 1 |
Total aircraft deposits | $ 2.7 |  |
Aggregate estimated probable liability environmental matters | $ 0.2 |  |
Number of parcels of land exists | Land_Parcel | 2 |  |
Aggregate commitments under operating leases | $ 268.3 |  |
Operational lease payable | 25.1 |  |
Lease commitment for aircraft | 254.5 |  |
Facility lease commitments | 13.8 |  |
2016 [Member] |  |  |
Long-term Purchase Commitment [Line Items] |  |  |
Aggregate purchase price for aircraft | 67.8 |  |
2017 [Member] |  |  |
Long-term Purchase Commitment [Line Items] |  |  |
Aggregate purchase price for aircraft | 55.7 |  |
2018 [Member] |  |  |
Long-term Purchase Commitment [Line Items] |  |  |
Aggregate purchase price for aircraft | 127.0 |  |
2019 [Member] |  |  |
Long-term Purchase Commitment [Line Items] |  |  |
Aggregate purchase price for aircraft | 150.4 |  |
2020 [Member] |  |  |
Long-term Purchase Commitment [Line Items] |  |  |
Aggregate purchase price for aircraft | 22.7 |  |
Heavy Aircraft [Member] |  |  |
Long-term Purchase Commitment [Line Items] |  |  |
Option to purchase additional number of aircrafts | Aircraft |  |  | 6
Number of aircraft orders cancelled previously scheduled for delivery | Aircraft |  | 4 |
Aggregate purchase price for aircraft | $ 26.7 |  |
Number of aircraft purchased | Aircraft | 1 |  |

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