Income Taxes - Rate Reconciliation (Detail) - Predecessor |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Effective Tax Rate Reconciliation [Line Items] | |||
| Federal statutory rate | 35.00% | 35.00% | 35.00% |
| State income taxes, net of federal benefit | 4.10% | 3.10% | 2.60% |
| Statutory depletion | 0.00% | 0.00% | (0.20%) |
| Valuation allowance | (39.00%) | (26.50%) | 0.00% |
| Other, net | (0.10%) | 0.10% | (0.10%) |
| Effective tax rate | 0.00% | 11.70% | 37.30% |