Note 2 - Significant Accounting Policies (Detail) - Property and Equipment (USD $) In Thousands, unless otherwise specified			12 Months Ended						12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Vehicles [Member] Minimum [Member]	Dec. 31, 2012 Vehicles [Member] Maximum [Member]	Dec. 31, 2012 Vehicles [Member]	Dec. 31, 2011 Vehicles [Member]	Dec. 31, 2012 Land [Member]	Dec. 31, 2011 Land [Member]	Dec. 31, 2012 Building and Building Improvements [Member] Minimum [Member]	Dec. 31, 2012 Building and Building Improvements [Member] Maximum [Member]	Dec. 31, 2012 Building and Building Improvements [Member]	Dec. 31, 2011 Building and Building Improvements [Member]	Dec. 31, 2012 Leasehold Improvements [Member] Minimum [Member]	Dec. 31, 2012 Leasehold Improvements [Member] Maximum [Member]	Dec. 31, 2012 Leasehold Improvements [Member]	Dec. 31, 2011 Leasehold Improvements [Member]	Dec. 31, 2012 Machinery and Equipment [Member] Minimum [Member]	Dec. 31, 2012 Machinery and Equipment [Member] Maximum [Member]	Dec. 31, 2012 Machinery and Equipment [Member]	Dec. 31, 2011 Machinery and Equipment [Member]	Dec. 31, 2012 Furniture and Fixtures [Member] Minimum [Member]	Dec. 31, 2012 Furniture and Fixtures [Member] Maximum [Member]	Dec. 31, 2012 Furniture and Fixtures [Member]	Dec. 31, 2011 Furniture and Fixtures [Member]	Dec. 31, 2012 Transportation Equipment [Member] Minimum [Member]	Dec. 31, 2012 Transportation Equipment [Member] Maximum [Member]	Dec. 31, 2012 Transportation Equipment [Member]	Dec. 31, 2011 Transportation Equipment [Member]	Dec. 31, 2012 Construction in Progress [Member]	Dec. 31, 2011 Construction in Progress [Member]
Property and equipment, gross							$ 69,965	$ 68,147			$ 174,953	$ 162,118			$ 24,710	$ 21,734			$ 40,581	$ 34,949			$ 39,993	$ 30,321			$ 40,103	$ 35,126	$ 6,605	$ 2,441
Estimated Life			2	8					31	39			2	39			5	20			3	15			2	15
Accumulated depreciation and amortization	(217,833)	(181,847)
Total	622,112	499,667
Lease and rental vehicles					$ 443,035	$ 326,678
Lease and rental vehicles			2	8					31	39			2	39			5	20			3	15			2	15