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Note 19 - Quarterly Results of Operations (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2015
Notes Tables |
Schedule of Quarterly Financial Information [Table Text Block] |
|  | 2015 |
|  | Three Months Ended |
|  | March 31 |  |  | June 30 |  |  | September 30 |  |  | December 31 |
|  | (in thousands, except per share data) |
Operating revenues |  | $ | 99,483 |  |  | $ | 108,033 |  |  | $ | 107,110 |  |  | $ | 102,424 |
Operating expenses and costs |  |  | 90,336 |  |  |  | 96,151 |  |  |  | 96,884 |  |  |  | 97,449 |
Operating income |  |  | 9,147 |  |  |  | 11,882 |  |  |  | 10,226 |  |  |  | 4,975 |
Non-operating income (loss) |  |  | 245 |  |  |  | 272 |  |  |  | (132 | ) |  |  | 1,131 |
Interest expense |  |  | 617 |  |  |  | 644 |  |  |  | 732 |  |  |  | 825 |
Income tax expense |  |  | 3,406 |  |  |  | 4,471 |  |  |  | 3,567 |  |  |  | 2,048 |
Net income |  | $ | 5,369 |  |  | $ | 7,039 |  |  | $ | 5,795 |  |  | $ | 3,233 |
Net income per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.72 |  |  | $ | 0.95 |  |  | $ | 0.81 |  |  | $ | 0.45 |
Diluted |  | $ | 0.72 |  |  | $ | 0.94 |  |  | $ | 0.80 |  |  | $ | 0.45 |
Average common shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 7,425 |  |  |  | 7,431 |  |  |  | 7,186 |  |  |  | 7,116 |
Diluted |  |  | 7,467 |  |  |  | 7,474 |  |  |  | 7,219 |  |  |  | 7,144 |
|  | 2014 |
|  | Three Months Ended |
|  | March 31 |  |  | June 30 |  |  | September 30 |  |  | December 31 |
|  | (in thousands, except per share data) |
Operating revenues |  | $ | 97,820 |  |  | $ | 104,343 |  |  | $ | 107,059 |  |  | $ | 101,715 |
Operating expenses and costs |  |  | 94,975 |  |  |  | 95,754 |  |  |  | 98,609 |  |  |  | 98,589 |
Operating income |  |  | 2,845 |  |  |  | 8,589 |  |  |  | 8,450 |  |  |  | 3,126 |
Non-operating income |  |  | 272 |  |  |  | 259 |  |  |  | 594 |  |  |  | 974 |
Interest expense |  |  | 862 |  |  |  | 743 |  |  |  | 632 |  |  |  | 660 |
Income tax expense |  |  | 898 |  |  |  | 3,160 |  |  |  | 3,355 |  |  |  | 1,308 |
Net income |  | $ | 1,357 |  |  | $ | 4,945 |  |  | $ | 5,057 |  |  | $ | 2,132 |
Net income per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.17 |  |  | $ | 0.62 |  |  | $ | 0.63 |  |  | $ | 0.27 |
Diluted |  | $ | 0.17 |  |  | $ | 0.62 |  |  | $ | 0.63 |  |  | $ | 0.27 |
Average common shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 7,985 |  |  |  | 7,992 |  |  |  | 7,993 |  |  |  | 7,988 |
Diluted |  |  | 8,033 |  |  |  | 8,035 |  |  |  | 8,032 |  |  |  | 8,027 |

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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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