Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash	$ 867	$ 1,742
Accounts receivable:
Trade, less allowance for doubtful accounts of $333 in 2013 and $423 in 2012	65,287	64,491
Other	3,558	2,089
Inventories	1,324	1,790
Prepaid expenses and other current assets	16,267	15,415
Total current assets	87,303	85,527
Property and equipment:
Land and structures	31,512	31,478
Revenue equipment	373,392	362,007
Service, office and other equipment	15,583	14,770
Property and equipment, at cost	420,487	408,255
Accumulated depreciation and amortization	(172,826)	(164,641)
Property and equipment, net	247,661	243,614
Note receivable	1,966	1,979
Other assets	355	374
Total assets	337,285	331,494
Current liabilities:
Bank drafts payable	2,096	5,150
Trade accounts payable	26,352	22,484
Current portion of insurance and claims accruals	9,166	6,915
Accrued expenses	8,482	7,710
Note payable	453	1,352
Current maturities of long-term debt and capital leases	15,835	14,403
Deferred income taxes	645	1,304
Total current liabilities	63,029	59,318
Deferred gain	662	646
Long-term debt and capital leases, less current maturities	129,659	122,530
Deferred income taxes	34,634	35,953
Insurance and claims accruals, less current portion	3,699	3,617
Commitments and contingencies	0	0
Stockholders’ equity:
Preferred	0	0
Common Stock, $.01 par value; authorized 30,000,000 shares; issued 11,899,821 shares in 2013 and 11,770,265 shares in 2012	119	118
Additional paid-in capital	65,331	65,259
Retained earnings	61,895	65,767
Less treasury stock, at cost (1,355,715 shares in 2013 and 1,337,568 shares in 2012)	(21,743)	(21,714)
Total stockholders’ equity	105,602	109,430
Total liabilities and stockholders’ equity	337,285	331,494
Rights [Member]
Stockholders’ equity:
Preferred	$ 0	$ 0