Consolidated Condensed Balance Sheets (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Current assets
Cash and cash equivalents	$ 632	$ 1,203
Accounts receivable, net	44,756	41,921
Tires on equipment in use, net	6,704	5,982
Deferred income taxes	1,150	1,150
Other current assets	4,582	6,575
Total current assets	57,824	56,831
Property and equipment, net	69,221	72,993
Other assets	4,990	5,081
Total assets	132,035	134,905
Current liabilities
Accounts payable	28,290	27,443
Insurance and claims accruals	8,733	8,697
Accrued payroll and deferred compensation	4,286	5,032
Accrued liabilities	780	709
Total current liabilities	42,089	41,881
Long-term debt	15,021	5,689
Deferred income taxes	1,491	3,153
Insurance and claims accruals	5,375	5,373
Total liabilities	63,976	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	143	1,353
Accumulated other comprehensive loss	(69)	0
Retained earnings	47,000	58,242
Total common shareholders' equity	74,932	87,453
Treasury stock (974 and 1,146 shares), at cost	(6,873)	(8,644)
Total shareholders' equity	68,059	78,809
Total liabilities and shareholders' equity	$ 132,035	$ 134,905