Consolidated Statements of Cash Flows (Unaudited) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Operating activities
Net loss	$ (4,474,000)	$ (14,431,000)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	33,399,000	33,571,000
Provision for doubtful accounts		81,000
Deferred income taxes	(2,071,000)	(7,947,000)
Stock-based compensation	220,000	166,000
Gain on disposal of assets, net	(1,444,000)	(1,756,000)
Deferred gain	(2,000)	(6,000)
Changes in operating assets and liabilities:
Accounts receivable	(5,085,000)	(6,874,000)
Inventories and prepaid expenses	(260,000)	(161,000)
Trade accounts payable and accrued expenses	820,000	5,766,000
Insurance and claims accruals	5,617,000	4,265,000
Net cash provided by operating activities	26,720,000	12,674,000
Investing activities:
Purchases of property and equipment	(10,095,000)	(19,235,000)
Proceeds from sale of property and equipment	10,508,000	15,601,000
Change in other assets	40,000	(34,000)
Net cash provided by (used in) investing activities	453,000	(3,668,000)
Financing activities
Borrowings under long-term debt	73,277,000	164,738,000
Principal payments on long-term debt	(83,468,000)	(154,486,000)
Principal payments on capitalized lease obligations	(13,749,000)	(18,590,000)
Principal payments on note payable	(1,352,000)	(1,370,000)
Net decrease in bank drafts payable	(3,615,000)	(1,309,000)
Net cash used in financing activities	(28,907,000)	(11,017,000)
Decrease in cash	(1,734,000)	(2,011,000)
Cash:
Beginning of period	1,742,000	2,659,000
End of period	8,000	648,000
Cash paid during the period for:
Interest	2,860,000	3,171,000
Supplemental disclosure of non-cash investing activities:
Liability incurred for leases on revenue equipment	27,602,000	24,934,000
Accounts Payable [Member]
Supplemental disclosure of non-cash investing activities:
Capital Expenditures Incurred but Not yet Paid	2,610,000	4,305,000
Long-term Debt [Member]
Supplemental disclosure of non-cash investing activities:
Capital Expenditures Incurred but Not yet Paid	$ 301,000	$ 233,000