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CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Revenues: |  |  |  |
Net (loss) gain on natural gas, oil, and NGL derivatives | $ (9,663) | $ (22,860) | $ (96,737) | $ 141,588
Total revenues | 360,962 | 265,498 | 939,094 | 922,455
Costs and expenses: |  |  |  |
Lease operating expenses | 22,325 | 20,020 | 64,143 | 60,044
Production taxes | 9,348 | 5,419 | 23,861 | 14,464
Midstream gathering and processing | 78,913 | 69,372 | 214,546 | 176,258
Depreciation, depletion and amortization | 119,915 | 106,650 | 352,848 | 254,887
General and administrative | 15,848 | 13,065 | 42,955 | 37,922
Accretion expense | 1,037 | 456 | 3,056 | 1,148
Acquisition expense | 0 | 33 | 0 | 2,391
Total costs and expenses | 247,386 | 215,015 | 701,409 | 547,114
INCOME (LOSS) FROM OPERATIONS | 113,576 | 50,483 | 237,685 | 375,341
OTHER (INCOME) EXPENSE: |  |  |  |
Interest expense | 33,253 | 27,130 | 100,922 | 74,797
Interest income | (92) | (37) | (162) | (927)
Litigation settlement | 917 | 0 | 917 | 0
Insurance proceeds | 0 | 0 | (231) | 0
Gain on sale of equity method investments | (2,733) | 0 | (124,768) | (12,523)
(Income) loss from equity method investments, net | (12,858) | 2,737 | (35,282) | 33,468
Other income | (61) | (345) | (201) | (863)
Total other (income) expense | 18,426 | 29,485 | (58,805) | 93,952
INCOME (LOSS) BEFORE INCOME TAXES | 95,150 | 20,998 | 296,490 | 281,389
INCOME TAX EXPENSE (BENEFIT) | 0 | 2,763 | (69) | 2,763
NET INCOME (LOSS) | $ 95,150 | $ 18,235 | $ 296,559 | $ 278,626
NET INCOME PER COMMON SHARE: |  |  |  |
Basic (in usd per share) | $ 0.55 | $ 0.10 | $ 1.69 | $ 1.56
Diluted (in usd per share) | $ 0.55 | $ 0.10 | $ 1.68 | $ 1.56
Weighted average common shares outstanding - Basic (in shares) | 173,057,538 | 182,957,416 | 175,776,312 | 178,736,569
Weighted average common shares outstanding - Diluted (in shares) | 173,304,914 | 183,008,436 | 176,440,461 | 179,130,570
Natural gas sales |  |  |  |
Revenues: |  |  |  |
Revenue from contract with customer | $ 271,167 | $ 223,340 | $ 753,261 | $ 606,544
Oil and condensate sales |  |  |  |
Revenues: |  |  |  |
Revenue from contract with customer | 45,682 | 31,459 | 140,687 | 85,338
Natural gas liquid sales |  |  |  |
Revenues: |  |  |  |
Revenue from contract with customer | $ 53,776 | $ 33,559 | $ 141,883 | $ 88,985

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
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