Summary of Significant Accounting Policies - Summary of Reconciliation of Amounts in Previously Reported Consolidated Financial Statements - Statement of Operations and Comprehensive Income (Loss) (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Quantifying Misstatement In Current Year Financial Statements [Line Items]
Production and ad valorem taxes	$ 1,931	$ 2,563
Total operating expenses	87,632	100,214
Operating loss	14,231	(50,608)
Loss before income taxes	26,847	(44,994)
Net loss	$ 26,847	$ (45,534)
Basic and diluted loss per share		$ (0.20)
As Reported [Member]
Quantifying Misstatement In Current Year Financial Statements [Line Items]
Production and ad valorem taxes		$ (2,284)
Total operating expenses		95,367
Operating loss		(45,761)
Loss before income taxes		(40,147)
Net loss		$ (40,687)
Basic and diluted loss per share		$ (0.18)
Adjustment [Member]
Quantifying Misstatement In Current Year Financial Statements [Line Items]
Production and ad valorem taxes		$ 4,847
Total operating expenses		4,847
Operating loss		(4,847)
Loss before income taxes		(4,847)
Net loss		$ (4,847)
Basic and diluted loss per share		$ (0.02)