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Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Operating revenues: |  |  |  |
Electric, natural gas distribution and pipeline and energy services | $ 227,442 | $ 204,455 | $ 651,565 | $ 599,533
Exploration and production, construction materials and contracting, construction services and other | 833,153 | 763,507 | 1,340,633 | 1,221,236
Total operating revenues | 1,060,595 | 967,962 | 1,992,198 | 1,820,769
Operating expenses: |  |  |  |
Fuel and purchased power | 18,169 | 15,193 | 39,777 | 33,613
Purchased natural gas sold | 70,255 | 58,411 | 269,442 | 243,839
Operation and maintenance: |  |  |  |
Electric, natural gas distribution and pipeline and energy services | 76,627 | 52,717 | 142,730 | 121,115
Exploration and production, construction materials and contracting, construction services and other | 661,495 | 623,347 | 1,055,511 | 999,497
Depreciation, depletion and amortization | 95,289 | 83,627 | 188,850 | 169,007
Taxes, other than income | 47,382 | 42,953 | 99,979 | 90,928
Total operating expenses | 969,217 | 876,248 | 1,796,289 | 1,657,999
Operating income | 91,378 | 91,714 | 195,909 | 162,770
Earnings (loss) from equity method investments | (7) | 385 | (319) | 1,637
Other income | 1,436 | 1,249 | 2,677 | 2,349
Interest expense | 21,427 | 17,650 | 42,300 | 37,089
Income before income taxes | 71,380 | 75,698 | 155,967 | 129,667
Income taxes | 24,988 | 26,691 | 52,983 | 44,769
Income from continuing operations | 46,392 | 49,007 | 102,984 | 84,898
Income (loss) from discontinued operations, net of tax | (59) | 5,106 | (136) | 5,006
Net income | 46,333 | 54,113 | 102,848 | 89,904
Net loss attributable to noncontrolling interest | (179) | 0 | (179) | 0
Dividends declared on preferred stocks | 171 | 171 | 342 | 343
Earnings on common stock | $ 46,341 | $ 53,942 | $ 102,685 | $ 89,561
Earnings per common share - basic: |  |  |  |
Earnings before discontinued operations | $ 0.25 | $ 0.26 | $ 0.54 | $ 0.45
Discontinued operations, net of tax | $ 0.00 | $ 0.03 | $ 0.00 | $ 0.02
Earnings per common share - basic | $ 0.25 | $ 0.29 | $ 0.54 | $ 0.47
Earnings per common share - diluted: |  |  |  |
Earnings before discontinued operations | $ 0.24 | $ 0.26 | $ 0.54 | $ 0.45
Discontinued operations, net of tax | $ 0.00 | $ 0.03 | $ 0.00 | $ 0.02
Earnings per common share - diluted | $ 0.24 | $ 0.29 | $ 0.54 | $ 0.47
Dividends declared per common share | $ 0.1725 | $ 0.1675 | $ 0.3450 | $ 0.3350
Weighted average common shares outstanding - basic | 188,831 | 188,831 | 188,831 | 188,821
Weighted average common shares outstanding - diluted | 189,463 | 189,107 | 189,460 | 189,096

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- Definition The net amount of other income and expense amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income (expense) recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) net gains or losses on securities, (d) unusual costs, (e) gains or losses on foreign exchange transactions, and (f) miscellaneous other income and expense items. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.9) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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