CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenues
Revenues	$ 605,253	$ 377,812
Operating expenses
Cost of revenues (excluding depreciation)	501,289	342,388
Operating expense (excluding depreciation)	50,348	38,177
Depreciation, depletion, and amortization	11,260	5,095
General and administrative expense	12,914	11,200
Acquisition and integration expense	253	671
Total operating expenses	576,064	397,531
Operating income (loss)	29,189	(19,719)
Other income (expense)
Interest expense and financing costs, net	(8,942)	(4,613)
Other income, net	130	46
Change in value of common stock warrants	(689)	1,644
Change in value of contingent consideration	0	6,176
Equity earnings (losses) from Laramie Energy, LLC	8,746	(1,871)
Total other income (expense), net	(755)	1,382
Income (loss) before income taxes	28,434	(18,337)
Income tax expense	(648)	(336)
Net income (loss)	$ 27,786	$ (18,673)
Earnings (loss) per share
Income (loss) per common share, basic (USD per share)	$ 0.60	$ (0.46)
Income (loss) per common share, diluted (USD per share)	$ 0.58	$ (0.46)
Weighted-average number of shares outstanding
Basic (in shares)	45,476	40,974
Diluted (in shares)	51,865	40,974