Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Common Class A [Member]
Stockholders' equity:
Common stock	$ 170	$ 170
Common Class B [Member]
Stockholders' equity:
Common stock	24	24
Cash and cash equivalents	3,690	4,490
Accounts receivable, net of allowance of $1,689 in 2016 and $1,857 in 2015	75,124	112,669
Drivers' advances and other receivables, net of allowance of $1,118 in 2016 and $1,005 in 2015	7,341	8,779
Inventory and supplies	4,189	4,004
Prepaid expenses	6,974	8,678
Assets held for sale	$ 1,325	25,626
Income taxes receivable		8,591
Total current assets	$ 98,643	172,837
Property and equipment, at cost	603,894	596,071
Less: accumulated depreciation and amortization	(153,394)	(142,022)
Net property and equipment	450,500	454,049
Other assets, net	20,388	19,831
Total assets	569,531	646,717
Checks outstanding in excess of bank balances	3,776	4,698
Accounts payable	8,818	12,272
Accrued expenses	23,651	30,143
Current maturities of long-term debt	27,056	39,395
Current portion of capital lease obligations	3,917	4,031
Current portion of insurance and claims accrual	17,500	17,134
Other short-term liabilities	15,995	18,549
Total current liabilities	100,713	126,222
Long-term debt	146,864	196,057
Long-term portion of capital lease obligations	10,224	10,547
Insurance and claims accrual	21,396	22,300
Deferred income taxes	71,027	76,981
Other long-term liabilities	12,207	12,450
Total liabilities	$ 362,431	$ 444,557
Commitments and contingent liabilities
Additional paid-in-capital	$ 138,280	$ 139,968
Treasury stock at cost; 89,855 and 149,498 shares as of March 31, 2016 and December 31, 2015, respectively	(1,959)	(3,408)
Accumulated other comprehensive loss	(16,162)	(17,544)
Retained earnings	86,747	82,950
Total stockholders' equity	207,100	202,160
Total liabilities and stockholders' equity	$ 569,531	$ 646,717