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Quarterly Data (Tables) | 12 Months Ended
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Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract] |
Quarterly financial data | The following unaudited information shows selected items by quarter for the years 2020 and 2019:
| First Quarter | Second Quarter | Third Quarter | Fourth Quarter
| (In thousands, except per share amounts)
2020 |  |  |  |
Operating revenues | $ | 1,197,373 |  | $ | 1,362,928 |  | $ | 1,587,289 |  | $ | 1,385,160 |
Operating expenses | 1,140,303 |  | 1,224,674 |  | 1,383,578 |  | 1,239,270 |
Operating income | 57,070 |  | 138,254 |  | 203,711 |  | 145,890 |
Income from continuing operations | 25,539 |  | 99,842 |  | 153,015 |  | 112,131 |
Income (loss) from discontinued operations, net of tax | (409) |  | (139) |  | 63 |  | 163 |
Net income | 25,130 |  | 99,703 |  | 153,078 |  | 112,294 |
Earnings per share - basic: |  |  |  |
Income from continuing operations | .13 |  | .50 |  | .76 |  | .56 |
Discontinued operations, net of tax | — |  | — |  | — |  | — |
Earnings per share - basic | .13 |  | .50 |  | .76 |  | .56 |
Earnings per share - diluted: |  |  |  |
Income from continuing operations | .13 |  | .50 |  | .76 |  | .56 |
Discontinued operations, net of tax | — |  | — |  | — |  | — |
Earnings per share - diluted | .13 |  | .50 |  | .76 |  | .56 |
Weighted average common shares outstanding: |  |  |  |
Basic | 200,440 |  | 200,522 |  | 200,522 |  | 200,522 |
Diluted | 200,456 |  | 200,539 |  | 200,619 |  | 200,923 |
2019 |  |  |  |
Operating revenues | $ | 1,091,191 |  | $ | 1,303,573 |  | $ | 1,563,799 |  | $ | 1,378,213 |
Operating expenses | 1,026,973 |  | 1,206,262 |  | 1,374,329 |  | 1,247,992 |
Operating income | 64,218 |  | 97,311 |  | 189,470 |  | 130,221 |
Income from continuing operations | 41,089 |  | 63,145 |  | 136,128 |  | 94,804 |
Income (loss) from discontinued operations, net of tax | (163) |  | (1,320) |  | 1,509 |  | 261 |
Net income | 40,926 |  | 61,825 |  | 137,637 |  | 95,065 |
Earnings per share - basic: |  |  |  |
Income from continuing operations | .21 |  | .32 |  | .68 |  | .47 |
Discontinued operations, net of tax | — |  | (.01) |  | .01 |  | — |
Earnings per share - basic | .21 |  | .31 |  | .69 |  | .47 |
Earnings per share - diluted: |  |  |  |
Income from continuing operations | .21 |  | .32 |  | .68 |  | .47 |
Discontinued operations, net of tax | — |  | (.01) |  | .01 |  | — |
Earnings per share - diluted | .21 |  | .31 |  | .69 |  | .47 |
Weighted average common shares outstanding: |  |  |  |
Basic | 196,401 |  | 198,270 |  | 199,343 |  | 200,383 |
Diluted | 196,414 |  | 198,287 |  | 199,383 |  | 200,478 |

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121640914&loc=d3e1280-108306 + Details
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