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Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
Revenues |  |  |  |
Total revenues | $ 831,229 | $ 867,720 | $ 2,412,023 | $ 2,536,848
Expenses |  |  |  |
Total expenses | 741,130 | 776,018 | 2,168,897 | 2,289,924
Operating income (loss) |  |  |  |
Total operating income | 90,099 | 91,702 | 243,126 | 246,924
Interest expense-other than on deposit liabilities and other bank borrowings | (20,304) | (20,020) | (59,705) | (58,758)
Allowance for borrowed funds used during construction | 498 | 688 | 1,626 | 2,451
Allowance for equity funds used during construction | 1,255 | 1,611 | 4,030 | 5,548
Income before income taxes | 71,548 | 73,981 | 189,077 | 196,165
Income taxes | 22,841 | 25,804 | 65,157 | 69,926
Net income | 48,707 | 48,177 | 123,920 | 126,239
Preferred stock dividends of subsidiaries | 471 | 471 | 1,417 | 1,417
Net income for common stock | 48,236 | 47,706 | 122,503 | 124,822
Basic earnings per common share (in dollars per share) | $ 0.49 | $ 0.49 | $ 1.24 | $ 1.29
Diluted earnings per common share (in dollars per share) | $ 0.48 | $ 0.49 | $ 1.23 | $ 1.29
Dividends per common share (in dollars per share) | $ 0.31 | $ 0.31 | $ 0.93 | $ 0.93
Weighted-average number of common shares outstanding (in shares) | 99,204 | 97,157 | 98,670 | 96,674
Net effect of potentially dilutive shares (in shares) | 614 | 361 | 620 | 423
Adjusted weighted-average shares (in shares) | 99,818 | 97,518 | 99,290 | 97,097
Electric utility |  |  |  |
Revenues |  |  |  |
Total revenues | 766,115 | 801,095 | 2,216,076 | 2,340,257
Expenses |  |  |  |
Total expenses | 694,201 | 726,276 | 2,030,071 | 2,146,688
Operating income (loss) |  |  |  |
Total operating income | 71,914 | 74,819 | 186,005 | 193,569
Income before income taxes | 57,373 | 61,268 | 144,212 | 154,976
Income taxes | 19,058 | 22,395 | 51,777 | 58,429
Net income | 38,315 | 38,873 | 92,435 | 96,547
Preferred stock dividends of subsidiaries | 498 | 498 | 1,496 | 1,496
Net income for common stock | 37,817 | 38,375 | 90,939 | 95,051
Bank |  |  |  |
Revenues |  |  |  |
Total revenues | 65,058 | 66,596 | 195,841 | 196,569
Expenses |  |  |  |
Total expenses | 42,223 | 44,974 | 126,550 | 130,161
Operating income (loss) |  |  |  |
Total operating income | 22,835 | 21,622 | 69,291 | 66,408
Income before income taxes | 22,808 | 21,627 | 69,265 | 66,964
Income taxes | 7,532 | 7,419 | 23,915 | 22,690
Net income | 15,276 | 14,208 | 45,350 | 44,274
Net income for common stock | 15,276 | 14,208 | 45,350 | 44,274
Other |  |  |  |
Revenues |  |  |  |
Total revenues | 56 | 29 | 106 | 22
Expenses |  |  |  |
Total expenses | 4,706 | 4,768 | 12,276 | 13,075
Operating income (loss) |  |  |  |
Total operating income | (4,650) | (4,739) | (12,170) | (13,053)
Income before income taxes | (8,633) | (8,914) | (24,400) | (25,775)
Income taxes | (3,749) | (4,010) | (10,535) | (11,193)
Net income | (4,884) | (4,904) | (13,865) | (14,582)
Preferred stock dividends of subsidiaries | (27) | (27) | (79) | (79)
Net income for common stock | $ (4,857) | $ (4,877) | $ (13,786) | $ (14,503)

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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 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 2: 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 3: 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 4: 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 5: 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 6: 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 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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