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CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (USD $) In Thousands, except Share data | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2011 | Sep. 30, 2010 | Sep. 30, 2011 | Sep. 30, 2010
Operating revenues: |  |  |  |
Electric, natural gas distribution and pipeline and energy services | $ 212,848 | $ 223,602 | $ 964,866 | $ 956,025
Construction services, natural gas and oil production, construction materials and contracting, and other | 939,333 | 902,321 | 2,019,877 | 1,911,119
Total operating revenues | 1,152,181 | 1,125,923 | 2,984,743 | 2,867,144
Operating expenses: |  |  |  |
Fuel and purchased power | 17,357 | 15,283 | 48,784 | 45,300
Purchased natural gas sold | 50,102 | 51,243 | 396,326 | 382,376
Operation and maintenance: |  |  |  |
Electric, natural gas distribution and pipeline and energy services | 69,475 | 95,367 | 207,465 | 226,788
Construction services, natural gas and oil production, construction materials and contracting, and other | 767,519 | 732,998 | 1,663,927 | 1,563,640
Depreciation, depletion and amortization | 88,897 | 84,841 | 256,861 | 245,066
Taxes, other than income | 39,410 | 37,229 | 131,591 | 123,421
Total operating expenses | 1,032,760 | 1,016,961 | 2,704,954 | 2,586,591
Operating income | 119,421 | 108,962 | 279,789 | 280,553
Earnings from equity method investments | 826 | 2,528 | 2,260 | 6,970
Other income | 1,282 | 1,740 | 5,090 | 6,929
Interest expense | 19,589 | 20,944 | 61,642 | 61,950
Income before income taxes | 101,940 | 92,286 | 225,497 | 232,502
Income taxes | 37,840 | 31,276 | 73,632 | 80,783
Income from continuing operations | 64,100 | 61,010 | 151,865 | 151,719
Income (loss) from discontinued operations, net of tax (Note 9) | (126) | 0 | 154 | 0
Net income | 63,974 | 61,010 | 152,019 | 151,719
Dividends on preferred stocks | 171 | 172 | 514 | 513
Earnings on common stock | $ 63,803 | $ 60,838 | $ 151,505 | $ 151,206
Earnings per common share - basic: |  |  |  |
Earnings before discontinued operations | $ 0.34 | $ 0.32 | $ 0.80 | $ 0.80
Discontinued operations, net of tax | $ 0.00 | $ 0.00 | $ 0.00 | $ 0.00
Earnings per common share -- basic | $ 0.34 | $ 0.32 | $ 0.80 | $ 0.80
Earnings per common share - diluted: |  |  |  |
Earnings before discontinued operations | $ 0.34 | $ 0.32 | $ 0.80 | $ 0.80
Discontinued operations, net of tax | $ 0.00 | $ 0.00 | $ 0.00 | $ 0.00
Earnings per common share -- diluted | $ 0.34 | $ 0.32 | $ 0.80 | $ 0.80
Dividends per common share | $ 0.1625 | $ 0.1575 | $ 0.4875 | $ 0.4725
Weighted average common shares outstanding -- basic | 188,794 | 188,170 | 188,753 | 188,088
Weighted average common shares outstanding -- diluted | 188,797 | 188,338 | 188,760 | 188,268

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