Summary of Significant Accounting Policies - Property, Plant and Equipment (Details) |
12 Months Ended |
|---|---|
Dec. 31, 2016 | |
| Automobiles and trucks | |
| Estimated useful lives | |
| Estimated useful lives | 5 years |
| Computers and office equipment | |
| Estimated useful lives | |
| Estimated useful lives | 5 years |
| Office furniture and fixtures | |
| Estimated useful lives | |
| Estimated useful lives | 7 years |
| Machinery and equipment | Minimum | |
| Estimated useful lives | |
| Estimated useful lives | 5 years |
| Machinery and equipment | Maximum | |
| Estimated useful lives | |
| Estimated useful lives | 30 years |
| Leasehold improvements | |
| Estimated useful lives | |
| Estimated useful lives | 30 years |
| Buildings and improvements | Minimum | |
| Estimated useful lives | |
| Estimated useful lives | 30 years |
| Buildings and improvements | Maximum | |
| Estimated useful lives | |
| Estimated useful lives | 40 years |