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Note 14 - Accumulated Other Comprehensive Income (Tables) | 12 Months Ended
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Dec. 31, 2013
Disclosure Text Block [Abstract] |
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] |
Details about AOCI Components |  | Amount Reclassified from AOCI for the years ended December 31, |  | Affected Line Item in the Statement of Operations |
|  | 2013 |  | 2012 |  | 2011 |  |
Gains on cash flow hedges |  |  |  |  |  |  |  |
Commodity derivative contracts |  | $ 643 |  | $ 5,031 |  | $ 3,126 |  | Fuel expense
|  | (247) |  | (1,932) |  | (1,200) |  | Income tax expense
|  | $ 396 |  | $ 3,099 |  | $ 1,926 |  | Net of tax

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- Definition Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss). + References No definition available. + Details
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