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Costs Incurred for Property Acquisition, Exploration and Development (Tables) | 9 Months Ended
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Sep. 30, 2019
Extractive Industries [Abstract] |
Costs Incurred for Property Acquisition, Exploration and Development |
|  | Nine Months Ended September 30, 2019 |  |  | Year Ended December 31, 2018 |
|  | (in thousands) |
Acquisitions: |  |  |  |  |  |  |  |
Acreage purchases |  | $ | 31,582 |  |  | $ | 62,390 |
Oil and gas properties |  |  | — |  |  |  | 1,683 |
Development |  |  | 541,455 |  |  |  | 834,552 |
Exploration: |  |  |  |  |  |  |  |
Drilling |  |  | — |  |  |  | 1,380 |
Expense |  |  | 25,961 |  |  |  | 32,196 |
Stock-based compensation expense |  |  | 1,372 |  |  |  | 1,921 |
Gas gathering facilities: |  |  |  |  |  |  |  |
Development |  |  | 3,127 |  |  |  | 10,218 |
Subtotal |  |  | 603,497 |  |  |  | 944,340 |
Asset retirement obligations |  |  | 812 |  |  |  | 28,826 |
Total costs incurred |  | $ | 604,309 |  |  | $ | 973,166 |
(a) | Includes costs incurred whether capitalized or expensed.

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- Definition Tabular disclosure of the aggregate of costs (whether the costs are capitalized or charged to expense at the time they are incurred ) incurred for the year in oil and gas property acquisition, exploration and development activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62059-109447 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 55 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=34713648&loc=d3e63042-109448 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62014-109447 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62038-109447 + Details
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