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Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Operating Revenues |  |  |
Regulated Energy | $ 246,208 | $ 256,226 | $ 269,438
Unregulated Energy | 133,049 | 149,586 | 146,793
Other | 13,245 | 12,215 | 11,315
Total operating revenues | 392,502 | 418,027 | 427,546
Operating Expenses |  |  |
Regulated energy cost of sales | 111,402 | 128,111 | 145,207
Unregulated energy and other cost of sales | 101,957 | 118,787 | 116,098
Operations | 82,387 | 79,810 | 77,227
Maintenance | 7,423 | 7,449 | 7,484
Depreciation and amortization | 22,510 | 20,153 | 18,536
Other taxes | 10,188 | 10,012 | 11,064
Total operating expenses | 335,867 | 364,322 | 375,616
Operating Income | 56,635 | 53,705 | 51,930
Other income, net of other expenses | 271 | 906 | 195
Interest charges | 8,747 | 9,000 | 9,146
Income Before Income Taxes | 48,159 | 45,611 | 42,979
Income taxes | 19,296 | 17,989 | 16,923
Net Income | $ 28,863 | $ 27,622 | $ 26,056
Weighted Average Common Shares Outstanding: |  |  |
Basic | 9,586,144 | 9,555,799 | 9,474,554
Diluted | 9,671,507 | 9,651,058 | 9,582,374
Earnings Per Share of Common Stock: |  |  |
Basic | $ 3.01 | $ 2.89 | $ 2.75
Diluted | $ 2.99 | $ 2.87 | $ 2.73
Cash Dividends Declared Per Share of Common Stock | $ 1.440 | $ 1.365 | $ 1.305

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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1448-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 8 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 07-4 -Paragraph 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 171 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Weighted-Average Number of Common Shares Outstanding -URI http://asc.fasb.org/extlink&oid=6528421 + Details
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