Commitments and Contingencies - Additional Information (Detail) $ in Thousands	2 Months Ended	8 Months Ended	9 Months Ended	12 Months Ended
	Sep. 12, 2016 USD ($)	Sep. 12, 2016 USD ($)	Sep. 30, 2016 USD ($) bbl	Dec. 31, 2010 USD ($)
Commitments and Contingencies Disclosure [Line Items]
Reorganization items, Settlements related to contract amendments	$ 2,550	$ 2,550
Long-term Purchase Commitment, Minimum Volume Required | bbl			8,000
Crude Oil Gathering Agreement			15
Marketing Agreement			10
Asset Retirement Obligation	2,700	$ 2,700	$ 2,700
Legal Reserve
Commitments and Contingencies Disclosure [Line Items]
Reserve established for contingency matters			100	$ 900
Crude Oil Gathering And Transportation Services
Commitments and Contingencies Disclosure [Line Items]
Reorganization items, Settlements related to contract amendments	$ 300
Contractual obligation, balance of 2015			9,600
Contractual Obligation, Due in Third Year			10,400
Contractual Obligation, Due in Fourth Year			11,700
Contractual Obligation, Due 2020 through 2025			13,000
Contractual Obligation, Due 2026			7,400
Contractual Obligation, Due 2027 through 2030			3,800
Contractual Obligation, Due 2031			2,200
Contractual obligation, annual			$ 3,900
Original Volume Required [Domain]
Commitments and Contingencies Disclosure [Line Items]
Long-term Purchase Commitment, Minimum Volume Required | bbl			15,000
Original Term [Domain]
Commitments and Contingencies Disclosure [Line Items]
Crude Oil Gathering Agreement			10