Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current assets
Cash and cash equivalents	$ 1,048	$ 1,203
Accounts receivable, net	43,450	41,921
Tires on equipment in use, net	5,968	5,982
Deferred income taxes	0	1,150
Equipment held for sale	3,437	0
Other current assets	7,868	6,575
Total current assets	61,771	56,831
Property and equipment, net	57,757	72,993
Deferred income taxes	1,009	0
Other assets	5,867	5,081
Total assets	126,404	134,905
Current liabilities
Accounts payable	30,339	27,443
Insurance and claims accruals	10,667	8,697
Accrued payroll and deferred compensation	4,047	5,032
Accrued liabilities	1,251	709
Current maturities of notes payable and capital lease obligations	1,936	0
Deferred income taxes	690	0
Total current liabilities	48,930	41,881
Long-term debt	19,888	5,689
Long-term notes payable and capital lease obligations	8,901	0
Deferred income taxes	0	3,153
Insurance and claims accruals	5,783	5,373
Total liabilities	83,502	56,096
Shareholders' equity
Common Stock, $1.50 par value per share; 75,000 shares authorized; 18,572 shares issued	27,858	27,858
Additional paid-in capital	427	1,353
Accumulated other comprehensive loss	(67)	0
Retained earnings	21,572	58,242
Total common shareholders' equity	49,790	87,453
Treasury stock (980 and 1,146 shares), at cost	(6,888)	(8,644)
Total shareholders' equity	42,902	78,809
Total liabilities and shareholders' equity	$ 126,404	$ 134,905