Note 19 - Asset Impairment (Details) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Note 19 - Asset Impairment (Details) [Line Items]
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 327,193,000	$ 259,551,000
Disposal Group, Including Discontinued Operation, Liabilities, Current	6,160,000
Air Transportation Equipment [Member] \| Truck Segment [Member]
Note 19 - Asset Impairment (Details) [Line Items]
Impairment of Long-Lived Assets Held-for-use	3,400,000
Property, Plant and Equipment, Gross		9,900,000
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment		3,900,000
Disposal Group, Including Discontinued Operation, Liabilities, Current		1,000,000
Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent		$ 6,200,000

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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Amount classified as liabilities attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.

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Amount classified as liabilities attributable to disposal group held for sale or disposed of, expected to be disposed of beyond one year or the normal operating cycle, if longer.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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