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Note 9 - Equity Method Investment (Detail) - TEL’s Summarized Financial Information (Transport Enterprise Leasing, LLC [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Transport Enterprise Leasing, LLC [Member]
Current Assets	$ 8,795	$ 6,898
Non-current Assets	24,111	21,150
Current Liabilities	1,413	9,988
Non-current Liabilities	26,092	13,670
Total Equity	5,401	4,390
Revenue	10,328	13,283
Operating Expenses	9,020	12,582
Operating Income	1,308	698
Net Income	$ 1,011	$ 500

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