Note 9 - Income Taxes (Detail) - Deferred Tax Assets and Liabilities (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Allowance for doubtful accounts	$ 662	$ 657
Insurance and claims	11,950	10,766
Net operating loss carryovers	16,978	31,031
Capital loss carryover related to Transplace		251
Other	5,607	6,085
Valuation allowance	(299)	(550)
Total deferred tax assets	34,898	48,240
Property and equipment	(76,748)	(83,651)
Other	(291)	(34)
Prepaid expenses	(3,054)	(2,842)
Total deferred tax liabilities	(80,093)	(86,527)
Net deferred tax liability	$ (45,195)	$ (38,287)