Note 10 - Equity Method Investment (Detail) - TEL’s Summarized Financial Information (Transport Enterprise Leasing, LLC [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Transport Enterprise Leasing, LLC [Member]
Current Assets	$ 6,898	$ 3,805
Non-current Assets	21,150	11,255
Current Liabilities	9,988	5,136
Non-current Liabilities	13,670	8,739
Total Equity	4,390	1,185
Revenue	53,459	31,070
Operating Expenses	48,382	29,426
Operating Income	5,077	1,644
Net Income	$ 3,850	$ 1,331