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The option to acquire ownership interest in the equity method investment pursuant to the agreement, percentage of ownership interest.

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Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.

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Amount of liability recognized arising from contingent consideration in a business combination.

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Amount of gain on the sale of property that does not qualify for gain recognition as of the balance sheet date.

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For an unclassified balance sheet, amounts due from related parties including affiliates, employees, joint ventures, officers and stockholders, immediate families thereof, and pension funds.

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This item represents disclosure of the amount of dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporation; these investments are accounted for under the equity method of accounting. This element excludes distributions that constitute a return of investment, which are classified as investing activities.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

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The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

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Note 10 - Equity Method Investment (Details) (USD $)	12 Months Ended			0 Months Ended	1 Months Ended	20 Months Ended
Note 10 - Equity Method Investment (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	May 31, 2011	May 31, 2011	Dec. 31, 2012
Note 10 - Equity Method Investment (Details) [Line Items]
Income (Loss) from Equity Method Investments	$ 3,730,000	$ 2,750,000	$ 1,875,000
Accrued Liabilities, Current	39,470,000us-gaap_AccruedLiabilitiesCurrent	28,185,000us-gaap_AccruedLiabilitiesCurrent
Proceeds from Sale of Property, Plant, and Equipment	78,776,000	51,930,000	57,525,000
Proceeds from Equity Method Investment, Dividends or Distributions	307,000	65,000	316,000
Equity Method Investments	12,192,000us-gaap_EquityMethodInvestments	8,737,000us-gaap_EquityMethodInvestments
Services Provided [Member] \| Transport Enterprise Leasing, LLC [Member]
Note 10 - Equity Method Investment (Details) [Line Items]
Revenue from Related Parties	2,700,000	2,400,000
Based On 2011 Results [Member] \| Transport Enterprise Leasing, LLC [Member]
Note 10 - Equity Method Investment (Details) [Line Items]
Business Combination, Contingent Consideration, Liability				1,000,000	1,000,000
Based On 2012 Results [Member] \| Transport Enterprise Leasing, LLC [Member]
Note 10 - Equity Method Investment (Details) [Line Items]
Income (Loss) from Equity Method Investments				2,400,000
Scenario, Forecast [Member]
Note 10 - Equity Method Investment (Details) [Line Items]
Option To Acquire Interest In Equity Method Investment, Percentage of Ownership	100.00%
Transport Enterprise Leasing, LLC [Member] \| Reduction In TEI Investment [Member]
Note 10 - Equity Method Investment (Details) [Line Items]
Deferred Gain on Sale of Property	800,000	800,000
Transport Enterprise Leasing, LLC [Member]
Note 10 - Equity Method Investment (Details) [Line Items]
Equity Method Investment, Ownership Percentage	49.00%			49.00%	49.00%
Payments to Acquire Equity Method Investments					1,500,000	4,900,000
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High				4,500,000	4,500,000
Income (Loss) from Equity Method Investments	3,700,000	2,800,000	1,900,000
Proceeds from Sale of Property, Plant, and Equipment	14,000,000	16,000,000
Deferred Gain on Sale of Property	100,000	100,000
Due from Related Parties	2,200,000	1,900,000
Proceeds from Equity Method Investment, Dividends or Distributions	300,000	100,000	300,000
Equity Method Investments	12,200,000	8,700,000
Earnout [Member]
Note 10 - Equity Method Investment (Details) [Line Items]
Accrued Liabilities, Current	$ 0