Long-term Debt - Summary of Assets Held under Capital Leases (Detail) - USD ($) $ in Thousands |
Dec. 31, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Schedule Of Capital Leases [Line Items] | ||
| Capital lease weighted average interest rate paid | 8.54% | |
| Total assets held under capital lease | $ 4,194 | $ 4,194 |
| Less: accumulated depreciation | (1,388) | (1,079) |
| Net assets under capital lease | 2,806 | 3,115 |
| Transportation equipment | ||
| Schedule Of Capital Leases [Line Items] | ||
| Total assets held under capital lease | $ 4,194 | $ 4,194 |