Disclosures about Oil and Natural Gas Activities (Unaudited) - Standardized Measure of Discounted Future Net Cash Flows (Detail) - Predecessor - USD ($) $ in Thousands |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|---|---|---|---|---|
| Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Line Items] | ||||
| Future cash flows | $ 4,635,481 | $ 6,327,363 | $ 11,275,090 | |
| Future production costs | (1,998,001) | (2,670,692) | (3,605,107) | |
| Future development and abandonment costs | (1,147,390) | (1,536,063) | (1,726,955) | |
| Future income tax provisions | 0 | (89,999) | (1,487,121) | |
| Net future cash flows | 1,490,090 | 2,030,609 | 4,455,907 | |
| Less effect of 10% discount factor | (961,309) | (1,345,920) | (2,561,207) | |
| Standardized measure of discounted future net cash flows | $ 528,781 | $ 684,689 | $ 1,894,700 | $ 1,743,772 |