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Note 11 - Accumulated Other Comprehensive Income (Tables) | 6 Months Ended
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Jun. 30, 2013
Accumulated Other Comprehensive Income [Abstract] |
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] |
Details about AOCI Components |  | Amount Reclassified from AOCI for the three months ended September 30, 2013 |  |  | Amount Reclassified from AOCI for the nine months ended September 30, 2013 |  | Affected Line Item in the Statement of Operations
Gains on cash flow hedges |  |  |  |  |  |  |  |  |
Commodity derivative contracts |  | $ | 310 |  |  | $ | 309 |  | Fuel expense
|  |  | 119 |  |  |  | 119 |  | Income tax expense
|  | $ | 191 |  |  | $ | 190 |  | Net of tax

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- Definition Tabular disclosure of the net gain (loss) and net prior service cost or credit recognized in other comprehensive income (loss) for the period for pension plans and/or other employee benefit plans, and reclassification adjustments of other comprehensive income (loss) for the period, as those amounts, including amortization of the net transition asset or obligation, are recognized as components of net periodic benefit cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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