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Segment Information (Tables) | 12 Months Ended
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Dec. 31, 2012
Schedule of Segment Reporting Information by Segment | The following table presents information about our reportable segments.
For the Years Ended December 31, |  | 2012 |  |  | 2011 |  |  | 2010 |
(in thousands) |  |  |  |  |  |  |  |  |
Operating Revenues, Unaffiliated Customers |  |  |  |  |  |  |  |  |  |  |  |
Regulated Energy |  | $ | 245,042 |  |  | $ | 255,405 |  |  | $ | 268,830 |
Unregulated Energy |  |  | 130,020 |  |  |  | 149,586 |  |  |  | 146,430 |
Other |  |  | 17,440 |  |  |  | 13,036 |  |  |  | 12,286 |
Total operating revenues, unaffiliated customers |  | $ | 392,502 |  |  | $ | 418,027 |  |  | $ | 427,546 |
Intersegment Revenues (1) |  |  |  |  |  |  |  |  |  |  |  |
Regulated Energy |  | $ | 1,166 |  |  | $ | 1,368 |  |  | $ | 1,104 |
Unregulated Energy |  |  | 3,029 |  |  |  | — |  |  |  | 363 |
Other |  |  | 917 |  |  |  | 793 |  |  |  | 856 |
Total intersegment revenues |  | $ | 5,112 |  |  | $ | 2,161 |  |  | $ | 2,323 |
Operating Income |  |  |  |  |  |  |  |  |  |  |  |
Regulated Energy |  | $ | 46,999 |  |  | $ | 43,911 |  |  | $ | 43,267 |
Unregulated Energy |  |  | 8,355 |  |  |  | 9,619 |  |  |  | 8,150 |
Other |  |  | 1,281 |  |  |  | 175 |  |  |  | 513 |
Operating Income |  |  | 56,635 |  |  |  | 53,705 |  |  |  | 51,930 |
Other income |  |  | 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 |
Depreciation and Amortization |  |  |  |  |  |  |  |  |  |  |  |
Regulated Energy |  | $ | 18,653 |  |  | $ | 16,512 |  |  | $ | 14,680 |
Unregulated Energy |  |  | 3,420 |  |  |  | 3,229 |  |  |  | 3,569 |
Other and eliminations |  |  | 437 |  |  |  | 412 |  |  |  | 287 |
Total depreciation and amortization |  | $ | 22,510 |  |  | $ | 20,153 |  |  | $ | 18,536 |
Capital Expenditures |  |  |  |  |  |  |  |  |  |  |  |
Regulated Energy |  | $ | 69,056 |  |  | $ | 37,104 |  |  | $ | 41,898 |
Unregulated Energy |  |  | 3,969 |  |  |  | 2,432 |  |  |  | 2,764 |
Other |  |  | 5,185 |  |  |  | 4,895 |  |  |  | 2,293 |
Total capital expenditures |  | $ | 78,210 |  |  | $ | 44,431 |  |  | $ | 46,955 |
(1) | All significant intersegment revenues are billed at market rates and have been eliminated from consolidated revenues.
At December 31, |  | 2012 |  |  | 2011 |
Identifiable Assets |  |  |  |  |  |  |  |
Regulated Energy |  | $ | 615,438 |  |  | $ | 565,563 |
Unregulated Energy |  |  | 79,287 |  |  |  | 107,916 |
Other |  |  | 39,021 |  |  |  | 35,587 |
Total identifiable assets |  | $ | 733,746 |  |  | $ | 709,066 |

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8736-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8813-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27, 28 -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 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8906-108599 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8721-108599 + Details
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