Nature of operations and summary of significant accounting policies--Property and Equipment (Detail) - Predecessor
|
12 Months Ended |
Dec. 31, 2016 |
|---|
| Furniture and Fixtures |
|
| Property Plant And Equipment [Line Items] |
|
| Property and equipment, useful life |
10 years
|
| Automobiles and Trucks |
|
| Property Plant And Equipment [Line Items] |
|
| Property and equipment, useful life |
5 years
|
| Machinery and Equipment | Minimum |
|
| Property Plant And Equipment [Line Items] |
|
| Property and equipment, useful life |
10 years
|
| Machinery and Equipment | Maximum |
|
| Property Plant And Equipment [Line Items] |
|
| Property and equipment, useful life |
20 years
|
| Office and Computer Equipment | Minimum |
|
| Property Plant And Equipment [Line Items] |
|
| Property and equipment, useful life |
5 years
|
| Office and Computer Equipment | Maximum |
|
| Property Plant And Equipment [Line Items] |
|
| Property and equipment, useful life |
10 years
|
| Building and Improvements | Minimum |
|
| Property Plant And Equipment [Line Items] |
|
| Property and equipment, useful life |
10 years
|
| Building and Improvements | Maximum |
|
| Property Plant And Equipment [Line Items] |
|
| Property and equipment, useful life |
40 years
|