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Note 14 - Accumulated Other Comprehensive (Loss) Income (Tables) | 12 Months Ended
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Dec. 31, 2014
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
|  | 2014 |  |  | 2013 |  |  | 2012 |  |
(Losses) gains on cash flow hedges |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commodity derivative contracts |  | $ | (3,141 | ) |  | $ | 643 |  |  | $ | 5,031 |  |  | Fuel expense
|  |  | 1,206 |  |  |  | (247 | ) |  |  | (1,932 | ) |  | Income tax expense
|  | $ | (1,935 | ) |  | $ | 396 |  |  | $ | 3,099 |  |  | 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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