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Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2012 | Mar. 31, 2011
Operating revenues: |  |
Electric, natural gas distribution and pipeline and energy services | $ 395,081 | $ 477,481
Exploration and production, construction materials and contracting, construction services and other | 457,726 | 424,324
Total operating revenues | 852,807 | 901,805
Operating expenses: |  |
Fuel and purchased power | 18,420 | 16,954
Purchased natural gas sold | 185,428 | 244,686
Operation and maintenance: |  |
Electric, natural gas distribution and pipeline and energy services | 68,401 | 67,963
Exploration and production, construction materials and contracting, construction services and other | 376,146 | 359,797
Depreciation, depletion and amortization | 85,380 | 84,674
Taxes, other than income | 47,975 | 49,665
Total operating expenses | 781,750 | 823,739
Operating income (loss) | 71,057 | 78,066
Earnings from equity method investments | 1,253 | 484
Other income | 1,098 | 1,900
Interest expense | 19,439 | 22,017
Income before income taxes | 53,969 | 58,433
Income taxes | 18,079 | 15,904
Income from continuing operations | 35,890 | 42,529
Income (loss) from discontinued operations, net of tax | (100) | 448
Net income | 35,790 | 42,977
Dividends declared on preferred stocks | 171 | 171
Earnings on common stock | $ 35,619 | $ 42,806
Earnings (loss) per common share - basic: |  |
Earnings Before Discontinued Operations | $ 0.19 | $ 0.22
Discontinued Operations, Net of Tax | $ 0.00 | $ 0.01
Earnings Per Common Share - Basic | $ 0.19 | $ 0.23
Earnings (loss) per common share - diluted: |  |
Earnings Before Discontinued Operations | $ 0.19 | $ 0.22
Discontinued Operations, Net of Tax | $ 0.00 | $ 0.01
Earnings Per Common Share - Diluted | $ 0.19 | $ 0.23
Dividends declared per common share (in dollars per share) | $ 0.1675 | $ 0.1625
Weighted average common shares outstanding - basic | 188,811 | 188,671
Weighted average common shares outstanding - diluted | 189,182 | 188,815

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