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Note 10 - Equity Method Investment (Details) (USD $) | 12 Months Ended |  | 0 Months Ended |  | 12 Months Ended |  |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | May 31, 2011 Based On 2011 Results [Member] Transport Enterprise Leasing, LLC [Member] | May 31, 2011 Based On 2012 Results [Member] Transport Enterprise Leasing, LLC [Member] | Dec. 31, 2013 Scenario, Forecast [Member] | Dec. 31, 2013 Transport Enterprise Leasing, LLC [Member] Services Provided [Member] | Dec. 31, 2012 Transport Enterprise Leasing, LLC [Member] Services Provided [Member] | Dec. 31, 2013 Transport Enterprise Leasing, LLC [Member] Reduction In TEI Investment [Member] | Dec. 31, 2012 Transport Enterprise Leasing, LLC [Member] Reduction In TEI Investment [Member] | May 31, 2011 Transport Enterprise Leasing, LLC [Member] | Dec. 31, 2013 Transport Enterprise Leasing, LLC [Member] | Dec. 31, 2012 Transport Enterprise Leasing, LLC [Member] | Dec. 31, 2011 Transport Enterprise Leasing, LLC [Member] | Dec. 31, 2013 Earnout [Member] | Dec. 31, 2012 Earnout [Member]
Note 10 - Equity Method Investment (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  |  |  |  |  | 49.00% | 49.00% |  |  |  |
Payments to Acquire Equity Method Investments |  |  |  |  |  |  |  |  |  |  | $ 1,500,000 |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High |  |  |  |  |  |  |  |  |  |  | 4,500,000 |  |  |  |  |
Business Combination, Contingent Consideration, Liability |  |  |  | 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Income (Loss) from Equity Method Investments | 2,750,000 | 1,875,000 | 675,000 |  | 2,400,000 |  |  |  |  |  |  | 2,800,000 | 1,900,000 | 700,000 |  |
Accrued Liabilities, Current | 28,185,000 | 27,884,000 |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 500,000
Option To Acquire Interest In Equity Method Investment, Percentage of Ownership |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |
Proceeds from Sale of Property, Plant, and Equipment | 51,930,000 | 57,525,000 | 65,318,000 |  |  |  |  |  |  |  |  | 16,000,000 | 8,600,000 |  |  |
Revenue from Related Parties |  |  |  |  |  |  | 2,400,000 | 2,100,000 |  |  |  |  |  |  |  |
Deferred Gain on Sale of Property |  |  |  |  |  |  |  |  | 800,000 | 800,000 |  | 100,000 | 200,000 |  |  |
Due from Related Parties |  |  |  |  |  |  |  |  |  |  |  | 1,900,000 | 800,000 |  |  |
Proceeds from Equity Method Investment, Dividends or Distributions | 65,000 | 316,000 | 241,000 |  |  |  |  |  |  |  |  | 100,000 | 300,000 | 200,000 |  |
Equity Method Investments | $ 8,737,000 | $ 6,133,000 |  |  |  |  |  |  |  |  |  | $ 8,700,000 | $ 6,100,000 |  |  |

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