Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Operating activities
Net loss	$ (3,872,000)	$ (8,359,000)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	21,767,000	22,335,000
Provision for doubtful accounts	(90,000)	127,000
Deferred income taxes	(1,978,000)	(4,492,000)
Stock-based compensation	44,000	86,000
Gain on disposal of assets, net	(819,000)	(1,266,000)
Deferred gain	16,000	(4,000)
Changes in operating assets and liabilities:
Accounts receivable	(2,175,000)	(7,162,000)
Inventories and prepaid expenses	(387,000)	(983,000)
Trade accounts payable and accrued expenses	3,281,000	6,490,000
Insurance and claims accruals	3,045,000	2,182,000
Net cash provided by operating activities	18,832,000	8,954,000
Investing activities:
Purchases of property and equipment	(7,209,000)	(7,839,000)
Proceeds from sale of property and equipment	5,149,000	11,727,000
Change in other assets	32,000	(110,000)
Net cash (used in) provided by investing activities	(2,028,000)	3,778,000
Financing activities
Borrowings under long-term debt	126,956,000	98,628,000
Principal payments on long-term debt	(130,147,000)	(93,528,000)
Principal payments on capitalized lease obligations	(10,536,000)	(16,007,000)
Principal payments on note payable	(899,000)	(912,000)
Net (decrease) increase in bank drafts payable	(3,053,000)	(2,942,000)
Net cash used in financing activities	(17,679,000)	(14,761,000)
Decrease in cash	(875,000)	(2,029,000)
Cash:
Beginning of period	1,742,000	2,659,000
End of period	867,000	630,000
Cash paid during the period for:
Interest	1,905,000	2,038,000
Supplemental disclosure of non-cash investing activities:
Liability incurred for leases on revenue equipment	21,989,000	16,484,000
Accounts Payable [Member]
Supplemental disclosure of non-cash investing activities:
Capital Expenditures Incurred but Not yet Paid	1,359,000	7,051,000
Long-term Debt [Member]
Supplemental disclosure of non-cash investing activities:
Capital Expenditures Incurred but Not yet Paid	$ 295,000	$ 233,000