Restatement of Previously Issued Financial Statements - Schedule of Unaudited Condensed Consolidated Statements of Operations, Including Balances Originally Reported, Corrections and as Restated Balances (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Depreciation, depletion and amortization	$ 15,425	$ 11,974
Total expenses	27,152	18,779
Income (loss) from operations	9,540	(1,163)
Loss before income taxes	(19,645)	4,821
Income tax benefit (expense)	3,109	(1,703)
Net (loss) income attributable to common stockholders	$ (18,425)	$ 3,118
Net loss per common share
Basic	$ (0.75)	$ 0.14
Diluted	$ (0.75)	$ 0.14
As Previously Reported
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Depreciation, depletion and amortization	$ 15,563	$ 12,142
Total expenses	27,290	18,947
Income (loss) from operations	9,402	(1,331)
Loss before income taxes	(19,783)	4,653
Income tax benefit (expense)	3,131	(1,587)
Net (loss) income attributable to common stockholders	$ (18,541)	$ 3,066
Net loss per common share
Basic	$ (0.75)	$ 0.14
Diluted	$ (0.75)	$ 0.13
Correction
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Depreciation, depletion and amortization	$ (138)	$ (168)
Total expenses	(138)	(168)
Income (loss) from operations	138	168
Loss before income taxes	138	168
Income tax benefit (expense)	(22)	(116)
Net (loss) income attributable to common stockholders	$ 116	$ 52
Net loss per common share
Basic	$ 0.00	$ 0.00
Diluted	$ 0.00	$ 0.01