Property and Equipment (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
Dec. 31, 2017 |
|
| Property, Plant and Equipment [Line Items] | |||||
| Property and equipment, gross | $ 231,981 | $ 231,981 | $ 187,572 | ||
| Less accumulated depreciation | (24,662) | (24,662) | (13,451) | ||
| Property and equipment, net | 207,319 | 207,319 | 174,121 | ||
| Depreciation expense | 4,100 | $ 3,100 | 11,300 | $ 8,900 | |
| Land and buildings | |||||
| Property, Plant and Equipment [Line Items] | |||||
| Property and equipment, gross | 38,203 | 38,203 | 32,088 | ||
| Machinery and equipment | |||||
| Property, Plant and Equipment [Line Items] | |||||
| Property and equipment, gross | 172,290 | 172,290 | 141,995 | ||
| Construction in progress | |||||
| Property, Plant and Equipment [Line Items] | |||||
| Property and equipment, gross | $ 21,488 | $ 21,488 | $ 13,489 | ||