Consolidated Condensed Statements of Cash Flows (unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash flows from operating activities
Net loss	$ (4,578)	$ (11,242)
Non-cash items included in net loss
Depreciation and amortization	7,727	11,027
Gain on sale of property and equipment	(2,537)	(573)
Provision for losses on accounts receivable	(416)	465
Deferred income taxes	0	(1,662)
Deferred compensation	246	250
Postretirement benefits	4	(69)
Investment income	(332)	(359)
Change in operating assets and liabilities
Accounts receivable	2,388	(3,300)
Tires on equipment in use	(2,248)	(2,599)
Other current assets	(2,194)	1,072
Other assets	(43)	(411)
Accounts payable	(4,133)	(1,901)
Insurance and claims accruals	(2,648)	38
Accrued liabilities, payroll and other	(271)	(358)
Net cash used in operating activities	(9,035)	(9,622)
Cash flows from investing activities
Expenditures for property and equipment	(1,073)	(4,768)
Proceeds from sale of property and equipment	7,219	3,730
Cash distributions from investments	312	761
Net cash provided by (used in) investing activities	6,458	(277)
Cash flows from financing activities
Proceeds from borrowings under credit facility	50,656	70,048
Payments against borrowings under credit facility	(46,285)	(60,716)
Proceeds from notes payable and capital lease obligations	31	0
Repayments of notes payable and capital lease obligations	(951)	0
Income tax (expense) benefit of stock options and restricted stock	(92)	14
Proceeds from capital stock transactions, net	0	598
Purchases of treasury stock	(4)	(616)
Net cash provided by financing activities	3,355	9,328
Net increase (decrease) in cash and cash equivalents	778	(571)
Cash and cash equivalents at beginning of period	1,048	1,203
Cash and cash equivalents at end of period	1,826	632
Supplemental disclosure of cash flow information:
Interest paid	399	198
Stock options	$ 0	$ 582