Employee Benefit Plans (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| 401(k) Profit Sharing Plan | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Maximum employee deferral percentage of pre-tax salary | 100.00% | ||
| Contributions made during period | $ 1.1 | $ 1.0 | $ 0.3 |
| Group Registered Retirement Savings Plan | Canadian Air Crane Ltd | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Maximum employee deferral percentage of pre-tax salary | 18.00% | ||
| Contributions made during period | $ 0.1 | $ 0.1 | $ 0.1 |
| Maximum employer contribution as a percentage of employee's compensation | 2.50% | ||