Other Intangible Assets, net - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Cost of Sales | |||
| Finite-Lived Intangible Assets [Line Items] | |||
| Amortization expense for intangible assets | $ 3.5 | $ 2.4 | $ 1.8 |
| Commercial Aviation Services | Customer Relationships | |||
| Finite-Lived Intangible Assets [Line Items] | |||
| Useful life (in years) | 2 years | ||
| Commercial Aviation Services | Customer Relationships | Change in amortization period | |||
| Finite-Lived Intangible Assets [Line Items] | |||
| Useful life (in years) | 2 years | 9 years | |
| Amortization expense for intangible assets | $ 1.0 | ||
| Amortization (in dollars per share) | $ 0.05 | ||