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Summary of Significant Accounting Policies - Additional Information 4 (Detail) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) Segment Customer $ / shares shares	Dec. 31, 2015 USD ($) Customer shares	Dec. 31, 2014 USD ($) Customer shares	Sep. 06, 2016 $ / shares
Operations And Summary Of Significant Accounting Policies [Line Items]
Number of operating segments | Segment	1
General and administrative expenses reimbursements of overhead costs	$ 12,400	$ 13,900	$ 13,200
Performance multiplier, minimum	0.00%
Performance multiplier, maximum	200.00%
Warrants for Common Stock exercise price | $ / shares	$ 0.01			$ 0.01
Interest costs, capitalized during period	$ 0	$ 900	$ 10,200
Interest paid in-kind	11,860
Convertible Notes
Operations And Summary Of Significant Accounting Policies [Line Items]
Interest paid in-kind	$ 11,860
Restricted Stock
Operations And Summary Of Significant Accounting Policies [Line Items]
Shares of unvested restricted stock outstanding | shares	354,986	314,048	241,505
Major Oil and Natural Gas Purchaser
Operations And Summary Of Significant Accounting Policies [Line Items]
Number of major customers of oil and gas sales | Customer	4	2	2
Major Oil and Natural Gas Purchaser One
Operations And Summary Of Significant Accounting Policies [Line Items]
Percentage accounted of oil and gas sales	42.00%	52.00%	53.00%
Major Oil and Natural Gas Purchaser Two
Operations And Summary Of Significant Accounting Policies [Line Items]
Percentage accounted of oil and gas sales	17.00%	25.00%	35.00%
Major Oil and Natural Gas Purchaser Three
Operations And Summary Of Significant Accounting Policies [Line Items]
Percentage accounted of oil and gas sales	14.00%
Major Oil and Natural Gas Purchaser Four
Operations And Summary Of Significant Accounting Policies [Line Items]
Percentage accounted of oil and gas sales	12.00%

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Exercise price per share or per unit of warrants or rights outstanding.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(4))
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Amount of interest capitalized during the period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Allowance for Funds Used during Construction
-URI http://asc.fasb.org/extlink&oid=6504829

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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Interest paid other than in cash for example by issuing additional debt securities. As a noncash item, it is added to net income when calculating cash provided by or used in operations using the indirect method.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)-(ii)
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