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Quarterly Data (Unaudited) | 12 Months Ended
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Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract] |
Supplementary financial information-quarterly data (Unaudited) | Supplementary Financial Information Quarterly Data (Unaudited) The following unaudited information shows selected items by quarter for the years 2014 and 2013:
| First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter |
| (In thousands, except per share amounts)
2014 |  |  |  |
Operating revenues | $ | 1,042,853 |  | $ | 1,094,046 |  | $ | 1,370,455 |  | $ | 1,163,204 |
Operating expenses | 939,949 |  | 995,112 |  | 1,193,690 |  | 1,053,582 |
Operating income | 102,904 |  | 98,934 |  | 176,765 |  | 109,622 |
Income from continuing operations | 56,184 |  | 52,780 |  | 102,118 |  | 80,079 |
Income (loss) from discontinued operations, net of tax | (45 | ) | 547 |  | 3 |  | 2,672 |
Net income attributable to the Company | 56,662 |  | 54,106 |  | 103,209 |  | 84,256 |
Earnings per common share - basic: |  |  |  |  |  |  |
Earnings before discontinued operations | .30 |  | .28 |  | .53 |  | .42 |
Discontinued operations, net of tax | — |  | — |  | — |  | .01 |
Earnings per common share - basic | .30 |  | .28 |  | .53 |  | .43 |
Earnings per common share - diluted: |  |  |  |  |  |  |
Earnings before discontinued operations | .30 |  | .28 |  | .53 |  | .42 |
Discontinued operations, net of tax | — |  | — |  | — |  | .01 |
Earnings per common share - diluted | .30 |  | .28 |  | .53 |  | .43 |
Weighted average common shares outstanding: |  |  |  |  |  |  |
Basic | 189,820 |  | 192,060 |  | 193,949 |  | 194,136 |
Diluted | 190,432 |  | 192,659 |  | 194,300 |  | 194,219 |
2013 |  |  |  |  |  |  |  |
Operating revenues | $ | 931,604 |  | $ | 1,060,595 |  | $ | 1,285,782 |  | $ | 1,184,423 |
Operating expenses | 827,073 |  | 969,217 |  | 1,135,909 |  | 1,037,306 |
Operating income | 104,531 |  | 91,378 |  | 149,873 |  | 147,117 |
Income from continuing operations | 56,592 |  | 46,392 |  | 84,550 |  | 91,348 |
Loss from discontinued operations, net of tax | (77 | ) | (59 | ) | (118 | ) | (58 | )
Net income attributable to the Company | 56,515 |  | 46,512 |  | 84,456 |  | 91,450 |
Earnings per common share - basic: |  |  |  |  |  |  |  |
Earnings before discontinued operations | .30 |  | .25 |  | .45 |  | .48 |
Discontinued operations, net of tax | — |  | — |  | — |  | — |
Earnings per common share - basic | .30 |  | .25 |  | .45 |  | .48 |
Earnings per common share - diluted: |  |  |  |  |  |  |  |
Earnings before discontinued operations | .30 |  | .24 |  | .44 |  | .48 |
Discontinued operations, net of tax | — |  | — |  | — |  | — |
Earnings per common share - diluted | .30 |  | .24 |  | .44 |  | .48 |
Weighted average common shares outstanding: |  |  |  |  |  |  |  |
Basic | 188,831 |  | 188,831 |  | 188,831 |  | 188,929 |
Diluted | 189,222 |  | 189,463 |  | 189,638 |  | 189,766 |
Notes:
• | First quarter 2014 reflects an unrealized loss on commodity derivatives of $4.3 million (after tax). First quarter 2013 reflects an unrealized loss on commodity derivatives of $3.7 million (after tax).
• | Second quarter 2014 reflects an unrealized loss on commodity derivatives of $3.3 million (after tax). Second quarter 2013 reflects an impairment of coalbed natural gas gathering assets of $9.0 million (after tax) and an unrealized gain on commodity derivatives of $8.2 million (after tax). For more information, see Note 1.
• | Third quarter 2014 reflects an unrealized gain on commodity derivatives of $18.1 million (after tax). Third quarter 2013 reflects an unrealized loss on commodity derivatives of $7.9 million (after tax).
• | Fourth quarter 2014 reflects a MEPP withdrawal liability of $8.4 million (after tax) and an unrealized gain on commodity derivatives of $4.1 million (after tax). Fourth quarter 2013 reflects a net benefit of $1.5 million (after tax) related to natural gas gathering operations litigation and an unrealized loss on commodity derivatives of $500,000 (after tax). For more information, see Notes 16 and 19.
Certain Company operations are highly seasonal and revenues from and certain expenses for such operations may fluctuate significantly among quarterly periods. Accordingly, quarterly financial information may not be indicative of results for a full year.

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- Definition The entire disclosure for the quarterly financial data in the annual financial statements. The disclosure may include a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income or loss before extraordinary items and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e765-108305 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e725-108305 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=35737889&loc=d3e1280-108306 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section G -Subsection 1 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 302 -Paragraph a + Details
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