This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 23
-URI http://asc.fasb.org/extlink&oid=73531572&loc=d3e1043-128460

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues
Revenues									$ 2,443,066	$ 1,865,045	$ 2,066,337
Operating expenses
Cost of revenues (excluding depreciation)									2,054,627	1,636,339	1,787,368
Operating expense (excluding depreciation)									202,019	166,216	141,621
Depreciation, depletion, and amortization									45,989	31,617	19,918
Impairment expense									0	0	9,639
General and administrative expense (excluding depreciation)									46,078	42,073	44,271
Acquisition and integration expense									395	5,294	2,006
Total operating expenses									2,349,108	1,881,539	2,004,823
Operating income (loss)	$ 21,602	$ 26,716	$ 16,451	$ 29,189	$ 28,325	$ (21,784)	$ (3,313)	$ (19,719)	93,958	(16,494)	61,514
Other income (expense)
Interest expense and financing costs, net									(31,632)	(28,506)	(20,156)
Loss on termination of financing agreements									(8,633)	0	(19,669)
Other income (expense), net									914	(98)	(291)
Change in value of common stock warrants									(1,674)	2,962	(3,664)
Change in value of contingent consideration									0	10,770	(18,450)
Equity earnings (losses) from Laramie Energy, LLC									18,369	(22,381)	(55,983)
Total other income (expense), net									(22,656)	(37,253)	(118,213)
Income (loss) before income taxes									71,302	(53,747)	(56,699)
Income tax benefit									1,319	7,912	16,788
Net income (loss)	$ 19,005	$ 18,824	$ 7,006	$ 27,786	$ 13,687	$ (27,761)	$ (13,088)	$ (18,673)	$ 72,621	$ (45,835)	$ (39,911)
Income (loss) per share
Basic (USD per share)	$ 0.41	$ 0.41	$ 0.15	$ 0.60	$ 0.30	$ (0.67)	$ (0.32)	$ (0.46)	$ 1.58	$ (1.08)	$ (1.06)
Diluted (USD per share)	$ 0.41	$ 0.41	$ 0.15	$ 0.58	$ 0.30	$ (0.67)	$ (0.32)	$ (0.46)	$ 1.57	$ (1.08)	$ (1.06)
Weighted-average number of shares outstanding
Basic (in shares)									45,543	42,349	37,678
Diluted (in shares)									45,583	42,349	37,678