Condensed Consolidated Balance Sheets (USD $)	Sep. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 17,234,000	$ 9,263,000
Accounts receivable, net of allowance of $1,923 in 2014 and $1,736 in 2013	78,837,000	81,242,000
Drivers' advances and other receivables, net of allowance of $1,366 in 2014 and $1,337 in 2013	6,063,000	5,356,000
Inventory and supplies	4,504,000	4,718,000
Prepaid expenses	9,790,000	10,418,000
Assets held for sale	2,459,000	7,073,000
Deferred income taxes	4,564,000	5,234,000
Income taxes receivable	1,156,000	146,000
Total current assets	124,607,000	123,450,000
Property and equipment, at cost	452,535,000	462,376,000
Less: accumulated depreciation and amortization	(120,871,000)	(132,768,000)
Net property and equipment	331,664,000	329,608,000
Other assets, net	13,892,000	13,364,000
Total assets	470,163,000	466,422,000
Current liabilities:
Checks outstanding in excess of bank balances		2,918,000
Accounts payable	9,604,000	8,322,000
Accrued expenses	31,018,000	28,185,000
Current maturities of long-term debt	36,277,000	44,070,000
Current portion of capital lease obligations	5,402,000	8,732,000
Current portion of insurance and claims accrual	16,025,000	17,151,000
Total current liabilities	98,326,000	109,378,000
Long-term debt	169,296,000	169,491,000
Long-term portion of capital lease obligations	12,234,000	13,186,000
Insurance and claims accrual	20,939,000	13,601,000
Deferred income taxes	61,303,000	59,077,000
Other long-term liabilities	5,568,000	1,329,000
Total liabilities	367,666,000	366,062,000
Stockholders' equity:
Additional paid-in-capital	89,112,000	88,620,000
Treasury stock at cost; 851,012 shares and 909,387 shares as of September 30, 2014 and December 31, 2013, respectively	(11,725,000)	(12,319,000)
Accumulated other comprehensive (loss) income	(2,379,000)	833,000
Retained earnings	27,320,000	23,057,000
Total stockholders' equity	102,497,000	100,360,000
Total liabilities and stockholders' equity	470,163,000	466,422,000
Common Class A [Member]
Stockholders' equity:
Common stock	145,000	145,000
Common Class B [Member]
Stockholders' equity:
Common stock	$ 24,000	$ 24,000