Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands |
Sep. 30, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Property, Plant and Equipment [Line Items] | ||
| Property, plant and equipment, gross | $ 378,019 | $ 349,821 |
| Less: accumulated depreciation | (198,191) | (172,546) |
| Property, plant and equipment, net | 195,553 | 191,985 |
| Buildings and Related Structures [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Property, plant and equipment, gross | 71,205 | 66,487 |
| Machinery and Equipment [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Property, plant and equipment, gross | 274,311 | 256,259 |
| Vehicles and Others [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Property, plant and equipment, gross | 32,503 | 27,075 |
| Land [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Property, plant and equipment, net | $ 15,725 | $ 14,710 |