| Quarterly Financial Data |
QUARTERLY FINANCIAL DATA (UNAUDITED) | | | | | | | | | | | | | | | | | | | | | | First Quarter | | Second Quarter | | Third Quarter | | Fourth Quarter | | Total | | (Thousands of Dollars, Except Per Unit Data) | 2011: | | | | | | | | | | Revenues | $ | 1,234,616 |
| | $ | 1,589,184 |
| | $ | 1,824,350 |
| | $ | 1,927,105 |
| | $ | 6,575,255 |
| Operating income | $ | 55,731 |
| | $ | 117,351 |
| | $ | 92,977 |
| | $ | 47,935 |
| | $ | 313,994 |
| Net income | $ | 28,516 |
| | $ | 92,605 |
| | $ | 70,281 |
| | $ | 30,199 |
| | $ | 221,601 |
| Net income per unit applicable to limited partners | $ | 0.30 |
| | $ | 1.27 |
| | $ | 0.92 |
| | $ | 0.30 |
| | $ | 2.78 |
| Cash distributions per unit applicable to limited partners | $ | 1.075 |
| | $ | 1.095 |
| | $ | 1.095 |
| | $ | 1.095 |
| | $ | 4.360 |
| | | | | | | | | | | 2010: | | | | | | | | | | Revenues | $ | 945,529 |
| | $ | 1,124,941 |
| | $ | 1,138,379 |
| | $ | 1,194,212 |
| | $ | 4,403,061 |
| Operating income | $ | 39,773 |
| | $ | 102,030 |
| | $ | 90,290 |
| | $ | 70,464 |
| | $ | 302,557 |
| Net income | $ | 19,703 |
| | $ | 99,422 |
| | $ | 68,310 |
| | $ | 51,535 |
| | $ | 238,970 |
| Net income per unit applicable to limited partners | $ | 0.19 |
| | $ | 1.43 |
| | $ | 0.90 |
| | $ | 0.65 |
| | $ | 3.19 |
| Cash distributions per unit applicable to limited partners | $ | 1.065 |
| | $ | 1.065 |
| | $ | 1.075 |
| | $ | 1.075 |
| | $ | 4.280 |
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