Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Accounts Payable [Member]
Supplemental disclosure of non-cash investing activities:
Purchases of revenue equipment included in accounts payable	$ 8,422,000	$ 3,635,000
Net income and Comprehensive income	7,132,000	2,733,000
Depreciation and amortization	29,951,000	33,395,000
Provision for doubtful accounts	360,000	798,000
Deferred income taxes, net	(7,931,000)	(3,625,000)
Share-based compensation	802,000	246,000
Gain on disposal of assets, net	(5,766,000)	$ (824,000)
Loss on extinguishment of debt	750,000
Change in vacation policy	(1,383,000)
Asset valuation reserve	281,000	$ (35,000)
Other	(6,000)
Accounts receivable	14,077,000	(10,066,000)
Inventories and prepaid expenses	1,132,000	(2,013,000)
Accounts payable and accrued liabilities	18,513,000	16,264,000
Insurance and claims accruals	1,248,000	1,203,000
Other long-term assets and liabilities	(374,000)
Net cash provided by operating activities	58,786,000	38,076,000
Capital expenditures	(45,000,000)	(34,577,000)
Proceeds from sale of property and equipment	31,212,000	12,882,000
Proceeds from operating sale leaseback	7,975,000
Change in other assets, net		19,000
Net cash used by investing activities	(5,813,000)	(21,676,000)
Borrowings under long-term debt	112,237,000	48,938,000
Payments on long-term debt	(132,356,000)	(49,560,000)
Payments on capitalized lease obligations	(25,658,000)	(12,840,000)
Net change in bank drafts payable	(3,422,000)	(1,860,000)
Excess tax benefit from exercise of stock options	837,000
Principal payments on note payable	(896,000)	(1,023,000)
Purchase of common stock	(4,702,000)
Proceeds from capital sale leaseback	3,156,000
Net (payments) or proceeds on stock based awards	(242,000)	18,000
Net cash used in financing activities	(51,046,000)	(16,327,000)
Increase in cash	1,927,000	73,000
Beginning of period	205,000	14,000
End of period	2,132,000	87,000
Interest	1,623,000	2,574,000
Income taxes	$ 2,996,000	$ 407,000