Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands |
Jun. 30, 2018 |
Dec. 31, 2017 |
|---|---|---|
| Property, Plant and Equipment [Line Items] | ||
| Property, plant and equipment, gross | $ 417,559 | $ 421,168 |
| Less: accumulated depreciation | (235,894) | (231,356) |
| Property, plant and equipment, net | 197,034 | 205,903 |
| Buildings and Related Structures [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Property, plant and equipment, gross | 70,194 | 69,958 |
| Machinery and Equipment [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Property, plant and equipment, gross | 302,207 | 308,713 |
| Others [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Property, plant and equipment, gross | 45,158 | 42,497 |
| Land [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Property, plant and equipment, net | $ 15,369 | $ 16,091 |