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Note 11 - Other Comprehensive Income ("OCI") (Tables) | 9 Months Ended
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Sep. 30, 2016
Notes Tables |
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] |
Details about OCI Components |  | Amount Reclassified from OCI for the three months ended September 30, 201 6 |  |  | Amount Re classified from OCI for the nine months ended September 30, 201 6 |  | Affected Line Item in the Statement of Operations
Losses on cash flow hedges |  |  |  |  |  |  |  |  |
Commodity derivative contracts |  | $ | 4,009 |  |  | $ | 13,125 |  | Fuel expense
|  |  | (1,543 | ) |  |  | (5,053 | ) | Income tax benefit
|  | $ | 2,466 |  |  | $ | 8,072 |  | Net of tax
Interest rate swap contract |  | $ | 136 |  |  | $ | 421 |  | Interest expense
|  |  | (53 | ) |  |  | (162 | ) | Income tax benefit
|  | $ | 83 |  |  | $ | 259 |  | Net of tax

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