Property, Plant and Equipment and Inventory - Summary of Inventory (Detail) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
Dec. 31, 2015 |
|
| Property, Plant and Equipment [Abstract] | |||||
| Depreciation expense | $ 7,300 | $ 5,200 | $ 19,481 | $ 15,797 | |
| Raw materials and supplies | 26,022 | 26,022 | $ 23,604 | ||
| Work-in-process | 8,966 | 8,966 | 8,763 | ||
| Finished goods | 204,910 | 204,910 | 31,196 | ||
| Less: obsolescence reserve | (7,911) | (7,911) | (3,658) | ||
| Total | $ 231,987 | $ 231,987 | $ 59,905 | ||