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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

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- Definition Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_WriteOffOfDeferredDebtIssuanceCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration