Condensed Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 28,823	$ 23,127
Accounts receivable, net of allowance of $1,856 in 2019 and $1,985 in 2018	158,367	151,093
Drivers' advances and other receivables, net of allowance of $648 in 2019 and $626 in 2018	12,166	16,675
Inventory and supplies	4,142	4,067
Prepaid expenses	15,022	11,579
Assets held for sale	4,372	2,559
Income taxes receivable	1,788	1,109
Other short-term assets	934	1,435
Total current assets	225,614	211,644
Property and equipment, at cost	723,263	638,770
Less: accumulated depreciation and amortization	(212,060)	(188,175)
Net property and equipment	511,203	450,595
Goodwill	42,518	41,598
Other intangibles, net	31,077	32,538
Other assets, net	41,117	37,149
Total assets	851,529	773,524
Current liabilities:
Checks outstanding in excess of bank balances	1,610	1,857
Accounts payable	24,754	22,101
Accrued expenses	29,513	49,503
Current maturities of long-term debt	37,794	28,710
Current portion of finance lease obligations	6,797	5,374
Current portion of operating lease obligations	14,117
Current portion of insurance and claims accrual	18,084	19,787
Total current liabilities	132,669	127,332
Long-term debt	208,848	166,635
Long-term portion of finance lease obligations	30,820	35,119
Long-term portion of operating lease obligations	24,921
Insurance and claims accrual	18,811	22,193
Deferred income taxes	80,920	77,467
Other long-term liabilities	2,855	1,636
Total liabilities	499,844	430,382
Commitments and contingent liabilities
Stockholders' equity:
Additional paid-in-capital	141,337	142,177
Accumulated other comprehensive (loss) income	(918)	204
Retained earnings	211,070	200,566
Total stockholders' equity	351,685	343,142
Total liabilities and stockholders' equity	851,529	773,524
Common Class A [Member]
Stockholders' equity:
Common stock	172	171
Common Class B [Member]
Stockholders' equity:
Common stock	$ 24	$ 24