Quarterly Financial Data |
| | | | | | | | | | | | | | | | | | | | First Quarter | | Second Quarter | | Third Quarter | | Fourth Quarter | Year Ended December 31, 2014 | | | | | | | (Thousands of dollars) | Revenues | | $ | 766,178 |
| | $ | 296,838 |
| | $ | 241,522 |
| | $ | 514,368 |
| Net margin | | $ | 259,836 |
| | $ | 176,493 |
| | $ | 166,452 |
| | $ | 224,176 |
| Operating income | | $ | 109,353 |
| | $ | 26,812 |
| | $ | 19,119 |
| | $ | 70,010 |
| Net income | | $ | 59,076 |
| | $ | 9,454 |
| | $ | 4,653 |
| | $ | 36,607 |
| Earnings per share | | | | | | | | | Basic | | $ | 1.13 |
| | $ | 0.18 |
| | $ | 0.09 |
| | $ | 0.70 |
| Diluted | | $ | 1.13 |
| | $ | 0.18 |
| | $ | 0.09 |
| | $ | 0.69 |
|
| | | | | | | | | | | | | | | | | | | | First Quarter | | Second Quarter | | Third Quarter | | Fourth Quarter | Year Ended December 31, 2013 | | | | | | | (Thousands of dollars) | Revenues | | $ | 635,933 |
| | $ | 311,608 |
| | $ | 219,725 |
| | $ | 522,686 |
| Net margin | | $ | 251,674 |
| | $ | 178,447 |
| | $ | 159,233 |
| | $ | 223,654 |
| Operating income | | $ | 101,838 |
| | $ | 39,307 |
| | $ | 14,189 |
| | $ | 65,014 |
| Net income | | $ | 53,492 |
| | $ | 14,951 |
| | $ | 434 |
| | $ | 30,318 |
| Earnings per share | | | | | | | | | Basic and diluted | | $ | 1.02 |
| | $ | 0.29 |
| | $ | 0.01 |
| | $ | 0.58 |
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