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Supplemental Gas Data (unaudited) Producing Wells, Developed Acreage and Undeveloped Acreage (Details) a in Thousands | Dec. 31, 2019 a well | Jun. 30, 2017 well
--- | --- | ---
Gross |  |
Producing Gas Wells (including Gob Wells) | well | 6,512,000 | 12
Producing Oil Wells | well | 151,000 |
Proved Developed Acreage | 337,700 |
Proved Undeveloped Acreage | 28,916 |
Unproved Acreage | 5,192,777 |
Total Acreage | 5,559,393 |
Net |  |
Producing Gas Wells (including Gob Wells) | well | 4,510,000 |
Producing Oil Wells | well | 0 |
Proved Developed Acreage | 337,700 |
Proved Undeveloped Acreage | 28,916 |
Unproved Acreage | 3,868,533 |
Total Acreage | 4,235,149 |

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- Definition Area assigned to productive oil and gas wells with working interest ownership. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1208 -Paragraph (a) + Details
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- Definition Leased area with working interest ownership on which oil and gas wells have not been drilled or completed that would permit production of economic quantities of oil and gas. Excludes area of undrilled acreage held by production under terms of lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1208 -Paragraph (b) + Details
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