Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Additional Information (Detail)

v3.7.0.1
Commitments and Contingencies - Additional Information (Detail)
$ in Millions
3 Months Ended
Mar. 31, 2017
USD ($)
bbl
Commitments and Contingencies Disclosure [Line Items]  
Long-term Purchase Commitment, Minimum Volume Required | bbl 8,000
Marketing Agreement 10
Asset Retirement Obligation $ 2.7
Legal Reserve  
Commitments and Contingencies Disclosure [Line Items]  
Reserve established for contingency matters 0.1
Crude Oil Gathering And Transportation Services  
Commitments and Contingencies Disclosure [Line Items]  
Contractual obligation, balance of 2015 7.3
Contractual Obligation, Due in Third Year 10.4
Contractual Obligation, Due in Fourth Year 11.7
Contractual Obligation, Due 2020 through 2025 13.0
Contractual Obligation, Due 2026 7.4
Contractual Obligation, Due 2027 through 2030 3.8
Contractual Obligation, Due 2031 2.2
Contract Drilling [Member]  
Commitments and Contingencies Disclosure [Line Items]  
Contractual Obligation $ 2.7