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SELECTED CONSOLIDATED QUARTERLY FINANCIAL DATA (UNAUDITED) (Tables) | 12 Months Ended
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Dec. 31, 2015
SELECTED CONSOLIDATED QUARTERLY FINANCIAL DATA (UNAUDITED) [Abstract] |
Quarterly Unaudited Consolidated Statements of Operations | The following table is derived from quarterly unaudited consolidated statements of operations for the years ended December 31, 2015 and 2014. Quarterly basic and diluted per share amounts do not add to the full year total due to rounding.
|  | First Quarter |  |  | Second Quarter |  |  | Third Quarter |  |  | Fourth Quarter |
In thousands (except per share data) |  | 2015 |  |  | 2014 |  |  | 2015 |  |  | 2014 |  |  | 2015 |  |  | 2014 |  |  | 2015 |  |  | 2014 |
Operating revenues |  | $ | 17,962 |  |  | $ | 16,900 |  |  | $ | 19,536 |  |  | $ | 17,891 |  |  | $ | 20,776 |  |  | $ | 19,595 |  |  | $ | 18,750 |  |  | $ | 18,079 |
Operating income |  | $ | 3,672 |  |  | $ | 3,146 |  |  | $ | 4,985 |  |  | $ | 3,649 |  |  | $ | 5,394 |  |  | $ | 5,331 |  |  | $ | 3,531 |  |  | $ | 3,920 |
Net income applicable to common stock |  | $ | 2,538 |  |  | $ | 2,083 |  |  | $ | 3,233 |  |  | $ | 1,962 |  |  | $ | 3,699 |  |  | $ | 3,317 |  |  | $ | 1,835 |  |  | $ | 2,144 |
Income per common share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.28 |  |  | $ | 0.24 |  |  | $ | 0.36 |  |  | $ | 0.22 |  |  | $ | 0.41 |  |  | $ | 0.37 |  |  | $ | 0.21 |  |  | $ | 0.24 |
Diluted |  | $ | 0.28 |  |  | $ | 0.23 |  |  | $ | 0.36 |  |  | $ | 0.22 |  |  | $ | 0.41 |  |  | $ | 0.37 |  |  | $ | 0.21 |  |  | $ | 0.24 |

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- Definition Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=51825399&loc=d3e1280-108306 + Details
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